Quantum chaos focuses on the quantum manifestations of classical chaos. A characteristic of classical chaos is the exponential sensitivity of the dynamics with respect to infinitesimal changes in the initial conditions. Thus, to classify classical dynamics it is sufficient to follow phase space trajectories starting infinitesimally close to each other and to determine the evolution of their distances with respect to each other with time. Because of the uncertainty relation, this is no longer possible in the corresponding quantum system.

One important aspect of quantum chaos is the understanding of features of the classical dynamics in terms of the fluctuation properties in the energy spectra of closed quantum systems or of the fluctuations exhibited by the scattering matrix elements describing open ones. The fluctuation properties are predicted to be universal, that is, to be the same for systems belonging to the same universality class and exhibiting the same chaotic behavior in the corresponding classical dynamics and to be describable by random matrix theory. Furthermore, random-matrix models that had been developed for the scattering matrix associated with compound-nuclear reactions have been shown to be applicable to quantum-chaotic scattering processes.

A second important aspect within the field of quantum chaos concerns the semiclassical approach. In this context, one of the most important achievements was the periodic orbit theory pioneered by Gutzwiller, which led to understanding the impact of the classical dynamics on the properties of the quantum system in terms of purely classical quantities.

The focus of research within the field of quantum chaos has been extended to relativistic quantum systems and to many-body quantum systems with focus on random matrix theory and the semiclassical approach. In distinction to single-particle systems, many-body systems like atomic nuclei do not have a classical analogue. In recent years different measures of chaos and models have been developed. Here, a prominent model is the Sachdev-Ye-Kitaev model which serves as a paradigm for the study of quantum chaos in strongly interacting many-body systems.

The school is aimed at PhD students, post-docs and outstanding master students and the first part will provide a survey of single- and many-body quantum chaos and applications based on random-matrix theory and the semiclassical approach. The second part of the school will focus on current aspects of research in the context of many-body quantum chaos.

There is no registration fee and limited funds are available for travel and local expenses.

Organizers:

• Hilda Cerdeira (IFT-UNESP, Brazil)
• Barbara Dietz-Pilatus (Institute for Basic Science (IBS), Republic of Korea)

List of participants: Updated on August 24, 2023

Satisfaction Survey: Here

Announcement:

Online application is now closed

Download program: updated – August 28

Friday (August 25), 11:30:

• 1. Ju-Yeon Gyhm: The Quantum Fisher Information of many-body systems
• 2. Ricardo Batista do Carmo: Quantization in Chaotic Billiards With Discrete Rotational Symmetry
• 3. Tiago Araújo de Paula Lima: Classical and Quantum Elliptical Billiards: Mixed Phase Space and Short Correlations in Singlets and Doublets
• 4. Pedro Henrique Santos Bento: Quantum transport in chaotic cavities with tunnel barriers
• 5. Washington Santos: Incoherent transport due to electron-electron interaction in disordered graphene nanoribbons
• 6. Ivana Ribeiro: Thermodynamic uncertainty relations in mesoscopic devices

Friday (August 25), 15:00:

• 7. Alessandra Chioquetta: Quantum many-body scars on the PXP model and beyond
• 8. Leonard Logaric: Weak Ergodicity Breaking in Dual Unitary Circuits
• 9. David Villasenor: Chaos in a dissipative spin-boson model
• 10. Miguel de Jesús González Martínez: Multifractal aspects of the Quantum Kicked Top model
• 11. WILLIAM ESTEBAN SALAZAR ESTRADA: On a matrix ensemble for arbitrary complex quantum systems
• 12. Gastón Scialchi: Quantum chaos in Krylov space

Format: 12 Min talk + 3 Minutes Questions

2023-08-21

• 09:30 - Barbara Dietz (Institute for Basic Science (IBS), Republic of Korea): Non-Relativistic and Relativistic Quantum Chaos Class 01 of 03
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• 11:30 - Thomas Guhr (University of Duisburg-Essen, Germany): Random Matrix Theory Applications from Single to Many-Body Quantum Chaos Class 01 of 03
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  • Additional info

2023-08-22

• 09:30 - Barbara Dietz ( Institute for Basic Science (IBS), Republic of Korea): Non-Relativistic and Relativistic Quantum Chaos Class 02 of 03
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• 11:30 - Martin Sieber ( University of Bristol, UK): Semiclassical Theory Approach in Quantum Chaos Class 01 of 03
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2023-08-23

• 09:30 - Martin Sieber ( University of Bristol, UK): Semiclassical Theory Approach in Quantum Chaos Class 02 of 03
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• 11:30 - Thomas Guhr (University of Duisburg-Essen, Germany): Random Matrix Theory Applications from Single to Many-Body Quantum Chaos Class 02 of 03
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• 14:00 - Barbara Dietz (BS Center for Theoretical Physics of Complex Systems): Experiments with Superconducting Microwave ResonatorsSimulating Artificial Graphene
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2023-08-24

• 09:30 - Barbara Dietz ( Institute for Basic Science (IBS), Republic of Korea): Non-Relativistic and Relativistic Quantum Chaos Class 03 of 03
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• 11:30 - Thomas Guhr (University of Duisburg-Essen, Germany): Random Matrix Theory Applications from Single to Many-Body Quantum Chaos Class 03 of 03
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  • Additional info

2023-08-25

• 09:30 - Martin Sieber (University of Bristol, UK): Semiclassical Theory Approach in Quantum Chaos Class 03 of 03

2023-08-28

• 09:30 - Juan Diego Urbina (University Regensburg, Institute for Theoretical Physics, Germany): The Semiclassical Approach to Discrete Quantum Fields and Many-Body Interference in Fock Space - Class 01 of 03
• 11:30 - Juan Diego Urbina (University Regensburg, Institute for Theoretical Physics, Germany): The Semiclassical Approach to Discrete Quantum Fields and Many-Body Interference in Fock Space - Class 02 of 03
• 15:00 - Horacio Pastawsk (Universidad Nacional de Córdoba-CONICET, Argentina): Dynamical Quantum Chaos in Many-Body Systems: An experimental quest for the origin of irreversibility from Loschmidt Echoes to Out of Time Order Correlators - Class 01 of 03
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  • Additional info

2023-08-29

• 09:30 - Juan Diego Urbina (University Regensburg, Institute for Theoretical Physics, Germany): The Semiclassical Approach to Discrete Quantum Fields and Many-Body Interference in Fock Space - Class 03 of 03
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• 11:30 - Horacio Pastawsk (Universidad Nacional de Córdoba-CONICET, Argentina): Dynamical Quantum Chaos in Many-Body Systems: An experimental quest for the origin of irreversibility from Loschmidt Echoes to Out of Time Order Correlators - Class 02 of 03

2023-08-30

• 09:30 - Dario Rosa (Institute for Basic Science (IBS), Republic of Korea): Aspects of Many-Body Quantum Chaos - Class 01 of 03
• 11:30 - Alexander Altland (University of Cologne, Germany): Quantum Chaos in the SYK model - Class 01 of 03
• 14:00 - Gabriel Carlo (CNEA-CONICET): Majorization-optimized quantum machine learning
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  • Attachment

2023-08-31

• 09:30 - Horacio Pastawsk (Universidad Nacional de Córdoba-CONICET, Argentina): Dynamical Quantum Chaos in Many-Body Systems: An experimental quest for the origin of irreversibility from Loschmidt Echoes to Out of Time Order Correlators - Class 03 of 03
• 11:30 - Alexander Altland (University of Cologne, Germany): Quantum Chaos in the SYK model - Class 02 of 03
• 15:00 - Dario Rosa (Institute for Basic Science (IBS), Republic of Korea): Aspects of Many-Body Quantum Chaos - Class 02 of 03

2023-09-01

• 09:30 - Dario Rosa (Institute for Basic Science (IBS), Republic of Korea): Aspects of Many-Body Quantum Chaos - Class 03 of 03
• 11:30 - Alexander Altland (University of Cologne, Germany): Quantum Chaos in the SYK model - Class 03 of 03

• Adair Campos Uscanga (Universidad Veracruzana): The Efficient Coherent Basis in quantum chaos and the importance of choosing the correct basis
• Felipe Gewers (Instituto de Física da Universidade de São Paulo – IFUSP): Development of a quantum channel between rubidium atoms D1 line and telecommunications’ L-band
• Gaspar Aníbal Gonzalez Acosta (Facultad de Ciencias Exactas/Universidad Nacional de La Plata): Classical Limit, Quantum Border and Energy
• Guilherme Ilario Correr (Instituto de Física de São Carlos – Universidade de São Paulo): Characterization of parameterized quantum circuits using tools from quantum information theory
• JESUS ALFONSO SEGURA LANDA (Universidad Veracruzana): Resonances in the kicked LMG model
• Joaquim de Miranda Telles de Miranda (Centro Brasileiro de Pesquisas Físicas): Subsystem trace distances of random states
• Maedeh Rezaei (Institute for Theoretical physics University of Cologne-THP): Investigating Gravity as a Quantum Chaotic System
• Maika MATOGAWA: Bistability of Chiral Lasing States in an Asymmetric 2D Microcavity Laser
• Martin Daniel Jimenez (Instituto de Física Enrique Gaviola, Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina): Two interacting fermionic pairs in a one-dimensional trap: a composite-boson approach
• Pablo Daniel Bergamasco (National Atomic Energy Commission – CNEA): Quantum Lyapunov exponent in dissipative systems
• Viani Suhail Morales Guzmán (Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México): A Comment on “Algebraic approach to the Tavis-Cummings model with three modes of oscillation” [J. Math. Phys. 59, 073506 (2018) ]
• Weihua Zhang (Institute for Basic Science and Lanzhou University): Thermalization Universality Class Transition Induced by Disorder’

 

The posters will be on display from the August 21 to September 1 on mezzanine level.
For details about the poster presentation, please, look at the correspondent Additional Information topic.

 

BOARDING PASS: All participants, whose travel has been provided or will be reimbursed by ICTP-SAIFR, should bring the boarding pass  upon registration. The return boarding pass (PDF, if online check-in, scan or picture, if physical) should be sent to secretary@ictp-saifr.org by e-mail.

COVID-19: Brazilians and foreigners no longer have to present proof of vaccination before entering the country.

Visa information: Nationals from several countries in Latin America and Europe are exempt from tourist visa. Nationals from Australia, Canada, Japan and USA are exempt from tourist visa until October 1st, 2023. Please check here which nationals need a tourist visa to enter Brazil.

Accommodation: Participants, whose accommodation will be provided by the institute, will stay at The Universe Flat. Hotel recommendations are available here

How to reach the Institute: The school will be held at ICTP South American Institute, located at IFT-UNESP, which is across the street from a major bus and subway terminal (Terminal Barra Funda). The address which is closer to the entrance of the IFT-UNESP building is R. Jornalista Aloysio Biondi, 120 – Barra Funda, São Paulo. The easiest way to reach us is by subway or bus, please find instructions here.

Poster presentation: Participants who are presenting a poster MUST BRING A BANNER PRINTED. The banner size should be at most 1 m (width) x 1,5 m (length). We do not accept A4 or A3 paper. Click here to see what a banner looks like: http://designplast.ind.br/produtos/detalhe/impressao-digital/banner/119/9

In order to extend the reach and diversity of its annual March Meeting, the American Physical Society has developed a pilot program of APS Satellite Meetings. In 2022, these satellite meetings were held in Africa and Asia, and in 2023, the satellite meetings will also include Latin America through the ICTP South American Institute for Fundamental Research (ICTP-SAIFR). As part of the virtual March Meeting from March 20-22, 2023, ICTP-SAIFR will be organizing three 2-hour sessions broadcast live to all participants of the APS Virtual March Meeting, as well as a session for student/postdoc presentations. Graduate students and postdocs can apply until March 6 to give oral presentations or posters at the student-postdoc session using the registration form below.

The sessions on March 20 from 14:00-21:00 will be held in-person in the IFT-UNESP auditorium and the session on March 21 from 19:00-21:00 will be held online. Registered participants of the Satellite Meeting can also request to attend other online sessions of the APS Virtual March Meeting which will be broadcast both in the IFT auditorium and online if there is sufficient interest. The complete schedule of sessions of the APS Virtual March Meeting can be found on the APS March Meeting webpage

Registered participants can either attend sessions in the IFT-UNESP auditorium or attend sessions online. To help accomplish the goal of extending the reach and diversity of the March Meeting, there is no registration fee for in-person or online participation in the APS/ICTP-SAIFR Satellite Meeting.

​Session Date/Time/Place: March 20, 14:00 – 16:00 (Brazil time), IFT auditorium
Chair: Alexandre Reily Rocha (IFT-UNESP, Brazil)

Live streaming: https://www.youtube.com/watch?v=zdSeO3tnsM4

14:00-14:30 Gustavo Martini Dalpian (Universidade Federal do ABC): Tuning spin splittings in 2D compounds

14:30-15:00 Luis Gregorio Dias (Universidade de São Paulo): Emergent parafermionic zero modes in fermionic systems

15:00-15:30 Eric Andrade (Universidade de São Paulo): Perturbing the Kitaev model

15:30-16:00 Márcio Sampaio (Universidade Federal do ABC): Enhancing molecular dynamics simulations of aqueous systems with deep neural network force fields

16:30 Graciele Martins Arvelos (UFABC): Vibrational properties of water layer adsorbed on Au(111) under a bias potential

16:45 Enésio Marinho Jr. (IFT-UNESP): Photovoltaic efficiency of bulk transition metal dichalcogenides by ab-initio  excited-state methods

17:00 Sabari Subramaniyan (IFT-UNESP): Study of quantum turbulence in dipolar BECs by circularly moving laser

17:15 Mariana Storrer (UFPR): Theory-Independent Context Incompatibility

17:30 Lucas Medeiros Ruela (IFGW/Unicamp): Fabrication and Measurement of Transmon-Type Superconducting Qubit

17:45 Alessandro Silva Santana (IFGW/Unicamp): Quantum entanglement characterization using metamaterial circuits

18:00 Arthur Oliveira (Unicamp – IMECC): State-independent contextuality in a multiple observers setup

• William de Castilho (IFUSP): Spherical model with Dzyaloshinskii- Moriya interactions
• Cristhian David Hinostroza Vargas Machuca (IFUSP): Thermal stability of the β-phase in the topological insulator Bi4I4
• Laura Freneda de Oliveira (UNESP): Dynamic multipolar polarizabilities of hydrogen-like atoms: a second order varionational perturbative method in the description of the Ba+
• Lui Zuccherelli de Paula (IFUSP): Sistema de dois qubits sob medição quântica contínua acoplados a banhos térmicos

​Session Date/Time/Place: March 20, 19:00 – 21:00 (Brasilia time), IFT auditorium
Chair: Marcelo Terra Cunha (Unicamp, Brazil)

Live streaming: https://www.youtube.com/watch?v=zdSeO3tnsM4

​Session Date/Time: March 21, 19:00 – 21:00 (Brasilia time), online
Chair: Marcus Aguiar (Unicamp, Brazil)

Live streaming: https://www.youtube.com/watch?v=3TLeBq2RdUA

Presentation 1: 19:30 – 20:00 
Tiago Pereira (USP São Carlos, Brazil): Coherence resonance in networks 
Abstract: Complex networks are abundant in nature and many share an importante structural property: they contain a few nodes that are abnormally highly connected (hubs). Some of these hubs are called influencers because they couple strongly to the network and play fundamental dynamical and structural roles. Strikingly, despite the abundance of networks with influencers, little is known about their response to stochastic forcing. Here, for oscillatory dynamics on influencer networks, we show that subjecting influencers to an optimal intensity of noise can result in enhanced network synchronization. This new network dynamical effect, which we call coherence resonance in influencer networks, emerges from a synergy between network structure and stochasticity and is highly nonlinear, vanishing when the noise is too weak or too strong.

Presentation 2: 20:00 – 20:30 
Gonzalo Marcelo Ramírez-Ávila (IIF, La Paz, Bolivia): Firefly behavior and its dynamical richness: from synchronization to oscillation death 
Fireflies are fascinating insects from a physical viewpoint. Thus, numerous physical phenomena are involved in the understanding of their flashing. Firefly synchronization is the first observed natural phenomenon displaying such behavior in large ensembles. Nowadays, it constitutes a paradigmatic example of synchronization associated in several firefly species with mating behavior. Interestingly, in terms of functionality, male synchronization is only the first step in the courtship, followed by a response from the females. The explanation of both mating steps can be described in terms of dynamical systems modeling whose equations are obtained from experimental results of the interaction of some automata denominated as electronic fireflies or, more technically, light-controlled oscillators (LCOs). A review of the principal attempts to build models that explain how and why fireflies synchronize is given in [1, 2]. The talk explains the experimental aspects related to LCOs, the construction of the model and its application to describe the phenomena of male synchronization, and the female response to synchronization. Furthermore, the oscillation death phenomenon in strongly coupled fireflies is also described.
[1] G.M. Ramírez-Ávila, J. Kurths, J.L. Deneubourg, Fireflies: A Paradigm in Synchronization, in: M. Edelman, E.E.N. Macau, M.A.F. Sanjuan (Eds.) Chaotic, Fractional, and Complex Dynamics: New Insights and Perspectives, Springer International Publishing, Cham, 2018, pp. 35-64.
[2] G.M. Ramírez-Ávila, J. Kurths, S. Depickère, J.-L. Deneubourg, Modeling Fireflies Synchronization, in: E.E.N. Macau (Ed.) A Mathematical Modeling Approach from Nonlinear Dynamics to Complex Systems, Springer International Publishing, Cham, 2019, pp. 131-156.

Presentation 3: 20:30 – 21:00 
Sergio R. Lopes (UFPR, Brazil): The role of local dynamics in the phase synchronization process of a network
Abstract: Partial phase synchronization, also reported as neuron cooperation, is a pivotal behavior of the brain and related to its main features, such as memory.  The excess or even the lack of phase synchronization are associated with brain disorders like epilepsy and Parkinson’s disease. These diseases may be related to malfunctioning of the synchronization process of the neurons, triggered by changes of the local dynamics of the neurons influenced by parameters such as the ion-channel conductance. In fact, it is common the use of drugs to block or activate specific channels, changing the conductance and bringing the synchronization process to some desired behavior.  We report here how individual characteristics of the local dynamics of the neurons, such as their linear stability, when coupled in a network may be a fundamental player in the phase synchronization process as a function of the coupling strength. Global and small-world topologies are considered. For both coupling schemes, the effects of the local dynamics are clear, inducing early or retarding the occurrence of partial phase synchronization of the network when the coupling strength is varied. In this scenario,  we discuss the effect of the local dynamics of the neuron, showing it may be of fundamental importance to understand and control the process of the network phase synchronization. The study also brings useful information to the general understanding of network-phase-synchronization processes.

Presentation 4: 21:00 – 21:30
Francisco Rodrigues (USP São Carlos, Brazil): Prediction and inference in complex systems
Abstract: Complex systems are made up of discrete parts that interact and form a network. The functioning and evolution of these systems depend on the network’s structure. For example, infectious diseases spread due to the connections between individuals. Our brain synchronizes according to the structure of connections between neurons. Since network structure affects these dynamic processes, we can use statistics and machine learning methods to make predictions and inferences about dynamic variables. In this talk, we will discuss how to predict dynamic processes, such as epidemics and synchronization, and infer the influence of the network on such processes.

Announcement:

Registration deadline is now closed

Poster presentation: Participants who are presenting a poster MUST BRING A BANNER PRINTED. The banner size should be at most 1 m (width) x 1,5 m (length). We do not accept A4 or A3 paper. Click here to see what a banner looks like: http://designplast.ind.br/produtos/detalhe/impressao-digital/banner/119/9

How to reach the Institute: The program will be held at ICTP South American Institute, located at IFT-UNESP, which is across the street from a major bus and subway terminal (Terminal Barra Funda). The address which is closer to the entrance of the IFT-UNESP building is R. Jornalista Aloysio Biondi, 120 – Barra Funda, São Paulo. The easiest way to reach us is by subway or bus, please find instructions here.

In this minicourse, I will give an introduction to phase transitions in the early universe and how they may produce stochastic gravitational waves which could be detected at current and future observatories.  After describing the dynamics of cosmological phase transitions and the quantities which control the production of gravitational waves, I will present several concrete particle-physics models and discuss their discovery prospects at gravitational-wave observatories.

Dates:

Times:  10:30 am to 12:00 pm

Lectures 1&2: Introduction: Phase transitions in the early universe and how they can source gravitational waves. Effective potential and thermal corrections in quantum field theory. Bubble nucleation during first-order phase transitions. Quantities that control the production of gravitational waves and resulting spectra.

Lectures 3&4: Overview of current and future gravitational-wave observatories. A simple model with a first-order phase transition: A nearly-conformal scalar. Thermal effective potential, dynamics of the phase transition, supercooling and gravitational-wave signals.

Lectures 5&6: The electroweak phase transition. Overview of ways to make it first-order. One model in detail: A scalar coupled to the Higgs. Different possibilities for the phase-transition dynamics in this model.

Lectures 7&8: Detour: Randall-Sundrum and composite Higgs models as solutions to the hierarchy problem. Phase transitions in Randall-Sundrum models and their dual conformal field theories are typically strongly first-order. Two-field phase transitions in composite Higgs models.

There is no registration fee and everybody is welcome to participate.

Lecturer:

• Benedict von Harling (IFAE-Barcelona, Spain)

Organizers:

• Rogerio Rosenfeld (ICTP-SAIFR/IFT-UNESP, Brazil)
• Riccardo Sturani ((ICTP-SAIFR/IFT-UNESP, Brazil)

Poster:

2023-02-10

• 10:30 - Benedict von Harling (IFAE-Barcelona): Minicourse on Cosmological Phase Transitions and Gravitational Waves - Class 1 of 7

2023-02-13

• 10:30 - Benedict von Harling (IFAE-Barcelona): Minicourse on Cosmological Phase Transitions and Gravitational Waves - Class 2 of 7

2023-02-15

• 10:30 - Benedict von Harling (IFAE-Barcelona): Minicourse on Cosmological Phase Transitions and Gravitational Waves - Class 3 of 7

2023-02-17

• 10:30 - Benedict von Harling (IFAE-Barcelona): Minicourse on Cosmological Phase Transitions and Gravitational Waves - Class 4 of 7

2023-02-27

• 10:30 - Benedict von Harling (IFAE-Barcelona): Minicourse on Cosmological Phase Transitions and Gravitational Waves - Class 5 of 7

2023-03-01

• 10:30 - Benedict von Harling (IFAE-Barcelona): Minicourse on Cosmological Phase Transitions and Gravitational Waves - Class 6 of 7

2023-03-03

• 10:30 - Benedict von Harling (IFAE-Barcelona): Minicourse on Cosmological Phase Transitions and Gravitational Waves - Class 7 of 7

COVID-19: Fully vaccinated Brazilians and foreigners are now exempt from presenting proof of a COVID-19 test with a negative or non-detectable result. You are only required to present proof of vaccination, printed or electronically. See requirements for travelling to Brazil at https://www.latam.com/en_un/experience/coronavirus/government-restrictions/ To enter the IFT-UNESP building, you may be required to show a Covid vaccination certificate.

Visa information: Nationals from several countries in Latin America and Europe, Australia, Canada, Japan and USA are exempt from tourist visa. Please check here which nationals need a tourist visa to enter Brazil.

Hotel recommendation: http://www.ictp-saifr.org/hotel-recommendations-2.

How to reach the Institute: The minicourse will be held at ICTP South American Institute, located at IFT-UNESP, which is across the street from a major bus and subway terminal (Terminal Barra Funda). The address which is closer to the entrance of the IFT-UNESP building is R. Jornalista Aloysio Biondi, 120 – Barra Funda, São Paulo. The easiest way to reach us is by subway or bus, please find instructions here.

The last decades have seen much progress in Condensed Matter Physics. On one hand, there were experimental discoveries of several novel materials displaying exotic behavior, such as unconventional superconductivity, fractional statistics, and topologically nontrivial phases. On the other hand, there was tremendous progress in engineering artificial systems like optical lattices, Rydberg atoms, and Floquet systems, establishing the field of Quantum Simulators. Besides being a proxy to interesting Condensed Matter systems, the Quantum Simulators also have access to the dynamics of the system, bringing exciting new possibilities and challenges to study many-body systems with an unprecedented degree of control. Overall, many of the most interesting properties arise from strong interactions between their constituents, with growing evidence of the key role played by inhomogeneities, frustration, and topological aspects of the matter.

In this workshop, we bring together experts working in this challenging and rapidly evolving field of Strongly Correlated Electronic Systems, to present their experimental and theoretical progress. This will allow for a vigorous exchange of ideas and hopefully stimulate exciting new collaborations between the participants.

Topics of the workshop include:
1. In and out of equilibrium disordered metals and insulators
2. Frustrated magnets, spin liquids, and topological insulators
3. Correlated and topological superconductors

This activity is a natural continuation of a workshop organized in 2018. Last but not least, the event also celebrates Prof. Eduardo Miranda’s 60th Birthday, honoring his contributions to the field and to the Brazilian Physics community.

There is no registration fee.

Organizers:

• Eric Andrade (IF-USP, Brazil)
• José Hoyos (IFSC-USP, Brazil)
• Victor Quito (Iowa State University and Ames National Lab, USA)

List of Participants: Updated on June 27, 2023

Satisfaction Survey: Click HERE

Talks:

• Gabriel Aeppli (ETH Zürich, EPF Lausanne and Paul Scherrer Institute, Switzerland): Mapping artificial and natural intelligence
• Carol Aguiar (UFMG, Brazil): Quench dynamics of the Kondo effect
• Amir Caldeira (UNICAMP, Brazil): Effective momentum-momentum coupling in a correlated electronic system: the diamagnetism of benzene.
• Vanuildo S. Carvalho (UFG, Brazil): Multipolar spin liquid in an exactly solvable model for J = 3/2 moments
• Claudio Chamon (Boston University, USA): Designing Topological Quantum Matter
• Wei Chen (PUC-Rio, Brazil): Unification of topological invariants and topological markers
• Mucio Continentino (CBPF, Brazil): Hybridization induced superconductivity in non-interacting chains
• Natanael Costa (UFRJ, Brazil): The effects of randomness to charge-ordered systems
• Luis Gregório Dias (USP, Brazil): Emergent parafermionic zero modes in fermionic systems
• Vlad Dobrosavljević (NHMFL & FSU, USA): Disorder-dominated quantum criticality in moiré bilayers
• Rafael Fernandes (University of Minnesota, USA): Inhomogeneous time-reversal symmetry-breaking in the superconducting state of Sr2RuO4
• Rebecca Flint (lowa State University and Ames National Laboratory, USA): Mobile Majorana Zero Modes in two-channel Kondo lattices
• Rafael S. Freitas (USP, Brazil): Structural disorder and magnetic properties of geometrically frustrated magnets
• Elena Gati (Max Planck Institute for Chemical Physics of Solids, Germany): Strain tuning of correlated (frustrated) magnets
• Wei Ku (Shanghai Jiaotong University, China): Robustness of geometric frustration-induced localization and realization of homogeneous quantum Bose metal
• Caio Lewenkopf (UFF, Brazil): Topological phase transitions in strongly disordered and amorphous systems
• Tobias Micklitz (CBPF, Brazil): Observation of Topological Quantum Criticality
• Eduardo Miranda (UNICAMP, Brazil): The domain wall between a Mott insulator and a metal is an anomalous metal
• Rajesh Narayanan (IIT-Madras, India): A Cloaked Griffiths phase in a low dimensional superconductor
• Willian Natori (Institute Laue Langevin, France): An exact chiral amorphous spin liquid
• Eduardo Novais (Universidade Federal do ABC): Spectrum of Entanglement as a Dimensional Reduction Tool for studying Topological Insulators
• Thereza Paiva (UFRJ, Brazil): Effects of lattice geometry on thermopower properties of the repulsive Hubbard model
• Rodrigo Pereira (IIP & UFRN, Brazil): Boundary modes in fracton models
• Dragana Popovic (NHMFL & FSU, USA): Nonequilibrium transport and thermalization in strongly disordered 2D electron systems
• Victor Quito (Iowa State University and Ames National Lab, USA): Unique signatures of electronic nematic liquids via nonlinear spectroscopy
• Srinivas Raghu (Stanford, USA): New insights on the quantum Hall transition problem
• Daniel Reyes (Instituto Militar de Engenharia, Brazil): Incommensurate charge density wave on multiband intermetallic systems
• Judit Romhanyi (UC Irvine, USA): Band-topology of triplet excitations
• Raimundo Rocha dos Santos (UFRJ, Brazil): Phase diagram for the extended Hubbard model on a square lattice
• Hana Schiff (UC Irvine, USA): Spin groups for weak spin-orbit coupling materials
• Eduardo Silva-Neto (Yale, USA): Broken Symmetry States and Mysterious Superconductivity in Tetragonal Fe(Se,S)
• Y. Soh (Paul Scherrer Institute, Switzerland): Flat band and Weyl physics in ferromagnetic kagome lattices
• Matheus Sousa (PUC-RJ, Brazil): Seeing topological charges by naked eyes
• Thaís Victa Trevisan (UC Berkeley, USA): Nonlinear Hall effect induced by a quantum metric dipole in antiferromagnetic heterostructures
• Oskar Vafek (NHMFL & FSU, USA): Interacting Hofstadter spectrum of twisted bilayer graphene
• Matthias Vojta (TU-Dresden, Germany): Emergence of mesoscale quantum phase transitions in a ferromagnet
• Thomas Vojta (Missouri S&T, USA): Controlling the stripe order in a diluted frustrated magnet

Posters:

Session 1 – Wednesday, June 21th at 15:40

• Patrícia de Assis Almeida (Universidade Federal de Uberlândia, Brazil): Quantum impurity with 2/3 local moment in 1D quantum wires: an NRG study
• João Victor Ferreira Alves (IFUSP, Brazil): Indirect Exchange Interaction in Topological Semimetals
• Maykon Vinicius Monteiro de Araujo (Federal University of Piauí, Brazil): The Hubbard Model on Anisotropic Triangular Lattice
• Lauro Barreto Braz (Instituto de Física de São Paulo, Brazil): Interplay of Charge and Spin Fluctuations for the onset of Superconductivity in Magic-Angle Twisted Bilayer Graphene
• Moallison Ferreira Cavalcante (Federal University of Minas Gerais, Brazil): Raman Response of the Charge Density Wave in Cuprate Superconductors
• Willdauany Cristina (Universidade Federal do Rio de Janeiro – UFRJ, Brazil): Entanglement and quantum phase transitions: geometrical aspects in strongly correlated systems
• Gabriel Capelo Domingues (Universidade de São Paulo – Inistituto de Física de São Carlos, Brazil): Magnetization processes in frustrated magnets
• Wiliam da Silva Oliveira (Universidade Federal do Rio de Janeiro): PROPERTIES OF THE ATTRACTIVE HUBBARD MODEL IN OPTICAL LATTICES.
• Joao Armando Sandron Galdino (Universidade de São Paulo, Brazil): Quantum phase transitions on aperiodic Potts chains
• Washington F. dos Santos (IFT-UNESP, Brazil): Simulations of single-electron transistors based on carbon nanotube-graphene nanoribbon junctions
• Alan Costa dos Santos (UFSCAR, Brazil): Generation of Maximally Entangled Long-Lived States with Giant Atoms in a Waveguide

Session 2 – Thursday, June 22th at 15:50

• Marco Antônio Habitzreuter (Instituto de Física, Universidade Federal do Rio Grande do Sul, Brazil): Water-like density anomaly in the extended Hubbard model
• Diana Heredia (Universidad De Investigación De Tecnología Experimental Yachay, Ecuador): Carbon nanotube synthesis and decoration with magnetite nanoparticles
• Vishnu Pulloor Kuttanikkad (Indian Institute of Technology Madras, India): Analysis of Critical Behaviour and Amplitude Modes near the Superfluid Transition in an Amorphous Lattice
• David Fernando Porlles López (Pontifícia Universidade Católica do Rio de Janeiro, Brazil): Quantum geometry of singlet superconductors
• Lucas Oliveira (PUC-RJ, Brazil): Entanglement in the Frustrated Heisenberg Model
• Fabrizio Oliviero (Universidade Federal do Rio Grande do Norte): Network construction of gapless chiral spin liquid
• Luan de Souza Silva (Universidade de São Paulo): Time evolution of time-dependent Green’s functions in quantum systems with neural networks
• Matthew Stern (University of California, Irvine): Band-topology of triplon modes and nontrivial surface states in KCuCl3
• Victor Velasco (Instituto de Física – Universidade Federal do Rio de Janeiro): The role of networks of oxygen puddles in cuprates: rise and fall of superconductivity
• Mario Malcolms (Max Planck Institute for Solid State Research, Germany): The role of non-local correlations in the half-filled triangular lattice Hubbard model
• Moallison Ferreira Cavalcante (Federal University of Minas Gerais, Brazil): Quench dynamics of the Kondo effect: transport across an impurity coupled to interacting wires

Announcement:

Online registration is now closed

School Program: PDF updated on June 19, 2023

2023-06-19

• 09:00 - Caio Lewenkopf (UFF , Brazil): Topological phase transitions in strongly disordered and amorphous systems
  • Attachment
• 09:40 - Thaís Victa Trevisan (UC Berkeley, USA): Nonlinear Hall effect induced by a quantum metric dipole in antiferromagnetic heterostructures
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• 10:20 - Matheus Sousa (PUC-RJ, Brazil): Seeing topological charges by naked eyes
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• 11:00 - Y. Soh (Paul Scherrer Institute, Switzerland): Flat band and Weyl physics in ferromagnetic kagome lattices
• 11:40 - Wei Chen (PUC-Rio, Brazil): Unification of topological invariants and topological markers
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• 14:10 - Thomas Vojta (Missouri S&T, USA): Controlling the stripe order in a diluted frustrated magnet
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• 14:50 - Rajesh Narayanan (IIT-Madras, India): A Cloaked Griffiths phase in a low dimensional superconductor
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• 15:50 - Rafael S. Freitas (USP , Brazil): Structural disorder and magnetic properties of geometrically frustrated magnets
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• 16:30 - Willian Natori (Institute Laue Langevin, France): An exact chiral amorphous spin liquid
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2023-06-20

• 09:00 - Thereza Paiva (UFRJ, Brazil): Effects of lattice geometry on thermopower properties of the repulsive Hubbard model
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• 09:40 - Raimundo Rocha dos Santos (UFRJ, Brazil): Phase diagram for the extended Hubbard model on a square lattice
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• 10:20 - Daniel Reyes (Instituto Militar de Engenharia, Brazil): Incommensurate charge density wave on multiband intermetallic systems
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• 14:10 - Matthias Vojta (TU-Dresden, Germany): Emergence of mesoscale quantum phase transitions in a ferromagnet
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• 14:50 - Wei Ku (Shanghai Jiaotong University, China): Robustness of geometric frustration-induced localization and realization of homogeneous quantum Bose metal
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• 15:50 - Oskar Vafek (NHMFL & FSU, USA): Interacting Hofstadter spectrum of twisted bilayer graphene
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2023-06-21

• 09:00 - Vlad Dobrosavljević (NHMFL & FSU, USA): Disorder-dominated quantum criticality in moiré bilayers
• 09:40 - Carol Aguiar (UFMG , Brazil): Quench dynamics of the Kondo effect
  • Attachment
• 10:40 - Victor Quito (Iowa State University and Ames National Lab, USA): Unique signatures of electronic nematic liquids via nonlinear spectroscopy
• 11:40 - Amir Caldeira (UNICAMP, Brazil): Effective momentum-momentum coupling in a correlated electronic system: the diamagnetism of benzene.
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• 14:00 - Gabriel Aeppli (ETH Zürich, EPF Lausanne and Paul Scherrer Institute, Switzerland): Mapping artificial and natural intelligence
  • Abstract

2023-06-22

• 08:00 - Program at: https://www.ictp-saifr.org/qm2023/ (ICTP - SAIFR): Workshop on Strong Electron Correlations in Quantum Materials: Inhomogeneities, Frustration, and Topology
  • Abstract
• 09:00 - Eduardo Miranda (UNICAMP, Brazil): The domain wall between a Mott insulator and a metal is an anomalous metal
• 09:40 - Srinivas Raghu (Stanford University, USA): New insights on the quantum Hall transition problem
• 10:20 - Natanael Costa (UFRJ, Brazil): Natanael Costa (UFRJ, Brazil): TBA
• 11:00 - Dragana Popovic (NHMFL & FSU, USA): (NHMFL & FSU, USA): Nonequilibrium transport and thermalization in strongly disordered 2D electron systems
  • Attachment
• 11:40 - Tobias Micklitz (CBPF, Brazil): Tobias Micklitz (CBPF, Brazil): Observation of Topological Quantum Criticality
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• 14:10 - Claudio Chamon (Boston University, USA): Designing Topological Quantum Matter
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• 14:50 - Rodrigo Pereira (IIP & UFRN, Brazil): Rodrigo Pereira (IIP & UFRN, Brazil): Boundary modes in fracton models
  • Attachment

2023-06-23

• 09:00 - Rebecca Flint (lowa State University and Ames National Laboratory, USA): Mobile Majorana Zero Modes in two-channel Kondo lattices
• 09:40 - Judit Romhanyi (UC Irvine, USA): Band-topology of triplet excitations
• 10:20 - Hana Schiff (UC Irvine, USA): Spin groups for weak spin-orbit coupling materials
• 11:40 - Mucio Continentino (CBPF, Brazil): Hybridization induced superconductivity in non-interacting chains
• 14:10 - Eduardo Novais (Universidade Federal do ABC): Spectrum of Entanglement as a Dimensional Reduction Tool for studying Topological Insulators
• 15:10 - Luis Gregório Dias (USP, Brazil): Emergent parafermionic zero modes in fermionic systems
• 15:50 - Vanuildo S. Carvalho (UFG, Brazil): Multipolar spin liquid in an exactly solvable model for J = 3/2 moments

Workshop Registration:  ALL participants should register. The registration will be on June 19 (Monday) at the Institute from 08:00 am to 09:00 am.

BOARDING PASS: All participants, whose travel has been provided or will be reimbursed by ICTP-SAIFR, should bring the boarding pass upon registration. The return boarding pass (PDF, if online check-in, scan or picture, if physical) should be sent to secretary@ictp-saifr.org by e-mail.

Visa information: Nationals from several countries in Latin America and Europe are exempt from tourist visa. Nationals from Australia, Canada, Japan and USA are exempt from tourist visa until October 1st, 2023. Please check here which nationals need a tourist visa to enter Brazil.

COVID-19: Brazilians and foreigners do neither have  to present proof of vaccination, nor a medical certificatewith a negative test result before entering the country. 

Poster presentation: Participants who are presenting a poster MUST BRING A BANNER PRINTED. The banner size should be at most: 1,5m x 1m. We do not accept A4 or A3 paper. Click here to see what a banner looks like:  http://designplast.ind.br/produtos/detalhe/impressao-digital/banner/119/9. Due to the number of posters, there will be two sessions. Please, check the website (https://www.ictp-saifr.org/qm2023/ )  to see your slot. 

Accommodation: Participants, whose accommodation will be provided by the institute, will stay at The Universe Flat. Hotel recommendations are available here

How to reach the Institute: The school will be held at ICTP South American Institute, located at IFT-UNESP, which is across the street from a major bus and subway terminal (Terminal Barra Funda). The address which is closer to the entrance of the IFT-UNESP building is R. Jornalista Aloysio Biondi, 120 – Barra Funda, São Paulo. The easiest way to reach us is by subway or bus, please find instructions here.

 

 

Quantum technologies has become a very hot topic in recent years, but it is necessary to understand what we mean by quantum technologies. It is true that quantum theory is behind a huge part of contemporary technological developments (e.g., lasers, semiconductors, and photoelectric conversion). However, the true non-classicality of quantum theory usually does not play a role in the vast majority of uses of such technologies. When we talk about quantum technologies, we are talking about things like using non-classical states of light or matter to make better sensors, or using the intrinsic randomness of quantum theory to generate keys for secure communication, and also applying quantum interference to speed up some computations. Those are the prototypical examples of the main areas of Quantum Sensing, Quantum Communication, and Quantum Computation.

The goal of this workshop is to mark the completion and launching of a Roadmap for Quantum Technologies in São Paulo, but also reaching Brazil and Latin America. We believe our state, country and region fulfill the conditions to host many active players in the production of Quantum Technologies, being much more than consumers in the Quantum Technologies global ecosystem currently under construction.

Due to the format and goals of this event, we are only encouraging the participation of members of our community (academia and industry) willing to engage and enrich our roadmap. The application form is available here. There is no registration fee, and the organizing committee will evaluate each application based on the aforementioned criteria. There will also be science outreach sessions during the program which will be open to the general public. 

Organizers:

Since August 2020 a group of scientists has committed to regular discussions towards the implementation of an initiative on Quantum Technologies, starting from São Paulo, and then intertwining with groups in other regions of Brazil and Latin America. The core contributors to this initiative are:

• Ben-Hur Viana Borges (USP-SC)
• Celso Villas-Boas (UFSCar)
• Cristiane de Morais Smith (Utrecht University, Netherlands)
• Fernando Brandão (Caltech, USA)
• Frederico Brito (USP-SC)
• Gustavo Wiederhecker (Unicamp)
• Marcelo Terra Cunha (Unicamp)
• Paulo Nussenzveig (USP)
• Philippe Courteille (USP-SC)

The workshop will span three weeks:

• During weeks 1 and 2, each day will be dedicated to discuss individual aspects of quantum technologies that are most relevant to our research context. Each morning will focus on brainstorming each topic, while the afternoons will focus on adapting the roadmap draft to incorporate the vibrant ideas discussed during the morning sessions. The following aspects will be discussed:
  • 30 Jan, Quantum Initiatives Around the World
    • Special guest: Tatjana Wilk (Munich Center Quantum Science and Technology)
  • 31 Jan, State of the Art in São Paulo
    • Special guest: Carlos Henrique de Brito Cruz (Elsevier), Remote presentation.
  • 01 Feb, Quantum Sensing
    • Special guests: Rainer Blatt  (Innsbruck) and  Philippe Bouyer (CNRS, Institut d’Optique)
  • 02 Feb, Quantum Communication
    • Special guest: Simon Groblacher (TU Delft)
    • Open doors science outreach event with Dr. Christiane de Morais Smith, in Portuguese (Utrecht University)
  • 03 Feb, Quantum Computing
    • Special guest:  Matthias Steffen (IBM), Remote presentation
  • 06 Feb, Perspectives for Agriculture
    • Special guest:  Débora Milori, Embrapa Instrumentação
  • 07 Feb, Perspectives for Health
    • Special guest:  Osvaldo Novais (IFSC-USP)
  • 08 Feb, The need for Quantum Education and Dissemination
    • Special guest: Sabine Righetti (Agência Bori, BR)
  • 09 Feb, The role of agencies
    • Special guests: Dr. Denise Caldwell (NSF, remote participation), Hugo Aguilaniu (Serrapilheira), Luiz Eugênio Mello (FAPESP), Sergio Rezende Machado (UFPE)
    • Open doors science outreach event (TBD)
  • 10  Feb, The role of companies
    • Special guests: Dr. Alberto Paridisi (CPqD), Dr. Dario Thober (Von Braun Labs)
• During week 3, a team of international advisors will gather to discuss and wrap up the core document prepared over the course of weeks 1 and 2.
• An overall assessment of the event will be released during a press conference held in the afternoon of the last day of the event, Feb. 16.

• Alexia Auffeves (CNRS, France)
• Alberto Paradisi (CPQD, Brazil)
• Artur Ekert (University of Oxford, UK)
• Bárbara Amaral (IFUSP, Brazil)
• Carlos Henrique de Brito Cruz (Elsevier, UK)
• Christian Schmiegelow (Universidad Buenos Aires, Argentina)
• Cristiane de Morais Smith (Utrecht University, Netherlands)
• Dario Thober (Instituto Von Braun, Brazil)
• Débora Milori (Embrapa Instrumentação, Brazil)
• Denise Caldwell (NSF Division director, USA)
• Enrique Solano (Chief Visionary Officer of Kipu Quantum, Germany and Founder of QUANVIA, Spain)
• Fernando Brandão (Caltech, USA)
• Gabriela Barreto Lemos (UFRJ, Brazil)
• Hugo Aguilaniu (Instituto Serrapilheira, Brazil)
• José Brito (Startup quantum Concepcion, Germany)
• Juan Pablo Paz (Universidad de Buenos Aires, Argentina)
• Kai Bongs (University of Birmingham, UK)
• Liviu Nicu (CNRS-South America, Brazil)
• Luiz Davidovich (UFRJ, Brazil)
• Luiz Eugênio Mello (FAPESP, Brazil)
• Matthias Steffen (IBM, USA)
• Osvaldo Novais de Oliveira Jr (USP, Brazil)
• Philippe Bouyer (CNRS, France)
• Rafael Chaves (IIP-UFRN, Brazil)
• Rainer Blatt (Universität Innsbruck, Austria)
• Sergio Rezende (UFPE, Brazil)
• Simon Gröblacher (Delft University of Technology, Netherlands)
• Stephen Walborn (Universidad de Concepción, Chile)
• Wolfgang Schleich (Ulm, Germany)

Due to the format and goals of this event, we are only encouraging the participation of members of our community (academia and industry) willing to engage and enrich our roadmap. There will be no registration fee, but the organizing committee will evaluate each application based on the aforementioned criteria.

Announcement:

Online registration is now closed

The full program and speakers for this event is available at this link

Two outreach events will be organized during this program:

• February 2, 2023, 18h30 – Cristiane de Morais Smith (Utrecht University, Netherlands). Link to Youtube live streaming: https://www.youtube.com/watch?v=CpX1XrWmmVw

• February 9, 2023, 18h30 – Marcelo Terra Cunha (UNICAMP, Brazil)

          Link to Youtube live streaming: https://www.youtube.com/watch?v=nlYsFTC6BHM

2023-01-30

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-01-31

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-01

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-02

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-03

• 10:30 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-06

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-07

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-08

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-09

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-10

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-13

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-14

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-15

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

2023-02-16

• 09:00 - Program at https://www.ictp-saifr.org/qt2023/ (ICTP-SAIFR): Quantum Technologies for São Paulo, Brazil, and Latin America

List of Participants: Updated on January 26, 2023

COVID-19: Fully vaccinated brazilians and foreigners are now exempt from presenting proof of a COVID-19 test with a negative or non-detectable result. You are only required to present proof of vaccination, printed or electronically. To enter the IFT-UNESP building, you may be required to show a Covid vaccination certificate.

Visa information: Nationals from several countries in Latin America and Europe, Australia, Canada, Japan and USA are exempt from tourist visa. Please check here which nationals need a tourist visa to enter Brazil.

Accommodation: Participants, whose accommodation will be provided by the institute, will stay at The Universe Flat. Hotel recommendations are available here

How to reach the Principia Institute: The workshop will be held at Principia Institute of the Institute for Theoretical Physics Foundation, located at Rua Pamplona, 145,  50 meters away from the hotel Universe Flat.

Link to Youtube live streaming on January 30 (9h-10h30): HERE