OpenQMBP2023: New perspectives in the out-of-equilibrium dynamics of open many-body quantum systems

Liste des Contributions

26. Assembling and probing strongly correlated fluids of light

Andrei Vrajitoarea (University of Chicago)

12/06/2023 11:00

Learning how to create and manipulate highly-entangled many-body systems is a central challenge of modern quantum science, with promising applications from quantum computation to many-body physics and quantum-enhanced metrology. Analog quantum simulators provide a rich playground for exploring the emergent collective phenomena in synthetic quantum systems, and how to harness these many-body...

27. Novel Non-equilibrium Phenomena in Quantum Fluids of Light

Marzena Szymanska (University College London)

12/06/2023 11:50

29. An open quantum safari: Criticality, Computing, and Chaos

Fabrizio Minganti (EPFL)

12/06/2023 15:00

28. Negative tripartite information after quantum quenches in integrable systems

Vincenzo ALBA (University of Pisa)

13/06/2023 10:00

Conference: Dissipative Many-Body Quantum Systems

We build the quasiparticle picture for the tripartite mutual information (TMI) after quantum quenches in spin chains that can be mapped onto free-fermion theories. A nonzero TMI (equivalently, topological entropy) signals quantum correlations between three regions of a quantum many-body system. The TMI is sensitive to entangled multiplets of more than two quasiparticles, i.e., beyond the...

39. Inelastic Cooper pair tunneling in the strongly interacting regime

Jérôme ESTEVE (Laboratoire de Physique des Solides)

13/06/2023 10:25

Conference: Dissipative Many-Body Quantum Systems

Superconducting circuits have recently emerged as a new platform to explore the physics of open many body systems using microwave photons in strongly non-linear media. In this talk, we will present some experimental results that were obtained in Orsay and in Grenoble where photons confined in a waveguide interact strongly through an impurity, here a Josephson junction. The system may be driven...

40. Neural-Network Quantum States for Entanglement Phase Transitions

Filippo Vicentini (Ecole Polytechnique)

13/06/2023 11:00

Conference: Dissipative Many-Body Quantum Systems

The success of Machine Learning owes to the development of neural-networks, variational approximators that can efficiently represent unknown functions living in high-dimensional spaces. Recently, those techniques have been ported to the field of numerical physics and used to approximate inherently high dimensional objects such as the Many-Body Wave-Function [1] or Density-Matrix [2] in an...

41. Adiabatic atom losses in nearly integrable quantum gases

Jérôme Dubail (CNRS)

13/06/2023 11:25

Conference: Dissipative Many-Body Quantum Systems

Cold atom gases are never perfectly isolated, and they typically suffer from atom losses. Different mechanisms for losses can be present, which are distinguished by the number of atoms K (K = 1, 2, 3, . . . ) involved in each loss event. When the dynamics of the isolated gas is integrable, atom losses weakly break integrability, and the evolution of the gas can be captured by a slowly varying...

42. Phase transitions in finite-component systems: Superradiance beyond the Dicke paradigm

Alexandre LE BOITE (Laboratoire MPQ, CNRS, Université de Paris Cité)

13/06/2023 11:50

Conference: Dissipative Many-Body Quantum Systems

The experimental control of the coherent interaction between light and matter is one of the corner stones of the recent developments in the field of quantum technologies. In this context, cavity quantum electrodynamics has reached an important milestone in the last decade with the achievement of the ultrastrong coupling (USC) regime, where the coupling strength becomes comparable or even...

43. Comparing bipartite entropy growth in open-system matrix product simulation methods

Johannes SCHACHENMAYER (CESQ/ISIS, CNRS & University of Strasbourg)

13/06/2023 14:00

Conference: Dissipative Many-Body Quantum Systems

In this talk I will discuss the "entanglement" entropy growth dynamics in open spin models, comparing different matrix product representations of the many-body density matrix. Recently we discovered mechanisms behind a logarithmic growth of operator entanglement (OE) in XXZ model dynamics subjected to dephasing [1]. I will contrast this behavior to the growth of trajectory entanglement (TE),...

44. Effect of slow losses in quantum gases with short range interactions: UV divergence in higher dimensions and breakdown of Tan's relation in 1D gases

Isabelle Bouchoule

13/06/2023 14:25

Conference: Dissipative Many-Body Quantum Systems

We investigate the effect of losses on interacting quantum gases with contact interaction. We show that, for gases in dimension higher than one, assuming a vanishing correlation time of the reservoir where dissipation occurs leads to a divergence of the energy increase rate. This divergence orginiates from the ghost singularity of the wavefunction immediately after a loss event. We show how...

45. Quantum-Darwinism-encoding transitions

Xiangyu CAO (CNRS/LPENS)

13/06/2023 15:00

Conference: Dissipative Many-Body Quantum Systems

Quantum Darwinism (QD) is a theory of how classical objectivity emerges from quantum mechanics. Its key idea is that the environment has objective knowledge of a qubit only if small fractions of the former are correlated with the latter (like in a GHZ state). However generic unitary dynamics in a many-body system scrambles and encodes information, instead of broadcasting it. Are the two...

46. Continuous superradiance sustained by a stream of excited atoms

Martin ROBERT DE SAINT VINCENT (Laboratoire de Physique des Lasers, CNRS, USPN)

13/06/2023 15:25

Conference: Dissipative Many-Body Quantum Systems

Superradiance of cold atoms in an optical cavity can be harvested to act as an optical frequency reference. By using an electronic transition much narrower spectrally than the cavity mode (i.e., by operating in the bad cavity limit), the frequency of the outcoming light is little affected by mirror position fluctuations – a signifiant limitation to short term stability in standard optical...

47. Sensing dynamical phase transitions

Katarzyna Macieszczak (University of Warwick)

13/06/2023 15:50

Conference: Dissipative Many-Body Quantum Systems

We will consider a parallel quantum dot as an example of an open quantum system that can feature a strong parity symmetry. For the dot, due to the presence of interactions, this symmetry results in the bistability characterised by distinct particle currents, while its explicit breaking leads to metastability. We will discuss when parameters of the dynamics can be estimated by continuously...

30. Presentation of Institut Pascal

Yves BALKANSKI (Institut Pascal - UPSaclay)

14/06/2023 10:30

31. Gaussian quantum trajectories for open and closed systems

Michiel Wouters

14/06/2023 11:00

I will discuss the use of Gaussian states for the modeling of open quantum systems within the quantum trajectory framework, with applications to bosonic systems and spin systems: the to two-photon driven cavities and the dissipative XYZ model. Thanks to the dissipation, the quantum fluctuations typically remain small at all times, therefore improving the validity of the Gaussian states as...

32. Laser-driven superradiant ensembles

Igor Ferrier-Barbut (CNRS, Institut d'Optique Graduate School, Université Paris Saclay)

14/06/2023 15:15

I will present our recent studies on superradiance in dense clouds of ultracold atoms, that are indistinguishably coupled to a mode of the electromagnetic field, akin to cavity or waveguide QED systems, but here in free space. We are in particular interested in the case where the atomic ensemble is continuously driven by a resonant laser that leads to a competition between laser driving and...

33. Search as (quantum) selforganized process

Giovanna Morigi (University of Saarland)

15/06/2023 11:00

Efficient retrieval of information is a core operation in the world wide web, it is essential for the sustainance fof living organism. Search dynamics, moreover, is a paradigm for optimization algorithms: Searches permeate our everyday life. Inspired by the food search dynamics of a living organism, the Physarum polycephalum, we analyse the role of noise in finding the optimal path on a graph...

34. Density wave ordering in a unitary gas with photon-mediated interactions

Jean-Philippe Brantut (EPFL)

15/06/2023 11:50

I will present the realization of a quantum degenerate Fermi gas interacting simultaneously via unitary-limited contact interaction and long-range, photon mediated interaction induced by an optical cavity. We observe the onset of density-wave order above a critical strength of the photon-mediated interaction, and characterize the phase diagram as a function of both interactions type. This...

35. Phantom relaxation in local many-body Floquet systems

Marko Znidaric (University of Ljubljana)

15/06/2023 14:30

We would like to understand relaxation towards a long-time steady state under unitary pure-state evolution. Focusing on a bipartite entanglement or out-of-time-ordered correlations, one sometimes finds that relaxation is not a simple exponential with a fixed rate, but that the rate exhibits a jump at an extensive time. Studying some solvable
cases of random circuits one finds that this...

36. Driven-Dissipative Systems: two messy experiments and one developing theory

Mohammad Hafezi

16/06/2023 11:00

As an example of driven-dissipative systems, I discuss two recent experiments: (1) strongly interacting excitons in moire heterostructures, (2) orbital angular pumping of quantum Hall states of graphene with vortex light. In the end, I briefly discuss our recent progress in verifying measurement-induced phases by avoiding the post-selection...

37. Phase transitions at a many-body exceptional point

Sebastian Diehl

16/06/2023 11:50

9. Phases of quantum information on a noisy quantum processor

Matteo Ippoliti (Stanford University)

19/06/2023 11:00

Abstract: I will discuss the experimental realization of measurement-induced phases of quantum information on Google Quantum AI's superconducting processor. By using a hybrid quantum-classical order parameter, which correlates experimental data with simulation, we observe signatures of distinct entanglement structures up to 70 qubits. We further show that noise, an inevitable limitation of the...

5. Statistical mechanics insights into the complexity of tensor network calculations

Romain Vasseur (University of Massachusetts Amherst)

19/06/2023 11:50

Tensor network states offer memory-efficient representations of quantum many-body states, and play a key role in classical simulations of quantum materials, chemistry, and circuits. However, rigorous results show that exactly computing observables from a tensor network state is generically a computationally hard problem outside of special instances such as 1d matrix-product states. Yet,...

6. Observing the effect of many measurements

Ehud Altman (University of California, Berkeley)

19/06/2023 14:30

7. Simulating quantum transport on classical computers: Bridging the high- and low-temperature limits

Curt von Keyserlingk (KCL)

20/06/2023 10:00

Quantum Trajectories and Measurement Induced Phase Transitions

Can we efficiently estimate transport coefficients (conductivities etc) in many-body quantum systems using classical computers? Drawing on lessons learned from studying scrambling and entanglement entropy dynamics in generic many-body systems, I propose an upper bound on the computational resources required to simulate transport at high temperatures: CPU time/memory $\sim...

8. Monte Carlo matrix-product-state approach to the false vacuum decay in the monitored quantum Ising chain

Alberto BIELLA (Pitaevskii BEC Center, CNR-INO and Università di Trento)

20/06/2023 10:25

Quantum Trajectories and Measurement Induced Phase Transitions

In this work we characterize the metastable dynamics in the ferromagnetic quantum Ising chain with a weak longitudinal field subject to continuous monitoring of the local magnetization. To this end we exploit a numerical approach based on the combination of matrix product states with stochastic quantum trajectories which allows for the simulation of the trajectory-resolved non-equilibrium...

72. Elusive phase transition in the replica limit of monitored systems

Guido Giachetti (CY Cergy Paris Université)

20/06/2023 10:50

Quantum Trajectories and Measurement Induced Phase Transitions

We study an exactly solvable model of monitored dynamics in a system of $N$ spin $1/2$ particles with pairwise all-to-all noisy interactions, where each spin is constantly perturbed by weak measurements of the spin component in a random direction. We make use of the replica trick to account for the Born's rule weighting of the measurement outcomes in the study of purification and other...

10. Topological transition in a continuously monitored free fermion model

Alessandro Romito (Lancaster University)

20/06/2023 11:25

Quantum Trajectories and Measurement Induced Phase Transitions

Local quantum measurements of many-body systems can induce phase transitions between volume and area law scaling of entanglement entropy.
Here we present a Gaussian fermionic model where continuous measurements of two non-commuting sets of observables induce a transition between area-law entanglement scaling phases of distinct topological order. We characterize the phase transition in terms...

11. TBA

Xhek Turkeshi (College de France)

20/06/2023 11:50

Quantum Trajectories and Measurement Induced Phase Transitions

16. Diffusion and subdiffusion in the disordered quantum and classical Heisenberg spin chains

Antonello Scardicchio

20/06/2023 14:00

Quantum Trajectories and Measurement Induced Phase Transitions

I will present some work on disordered Heisenberg model on a chain which shows that, depending on the strength of the disorder, both the classical and quantum model have a transition from diffusive to subdiffusive transport.
Based on:

AJ McRoberts, F Balducci, R Moessner, A Scardicchio
arXiv preprint arXiv:2304.05423

IV Protopopov, RK Panda, T Parolini, A Scardicchio, E Demler, DA...

14. Monitored Fermions: Phenomenology, Effective Theory and Dark State Phase Transitions

Michael Buchhold (University of Cologne)

20/06/2023 14:25

Quantum Trajectories and Measurement Induced Phase Transitions

Monitored Fermions provide a rich playground for the study of entanglement phase transitions in non-unitary quantum dynamics. We will discuss the phenomenology of entanglement transitions in several classes of monitored Hamiltonian systems and in fermion circuits and introduce effective theories describing both setups. We will then utilize adaptive feedback to reduce the configurational...

15. Triviality of quantum trajectories close to a directed percolation transition

Lorenzo Piroli (ENS Paris)

20/06/2023 15:00

Quantum Trajectories and Measurement Induced Phase Transitions

In this talk, I will discuss a variation of the standard framework of measurement-induced phase transitions, where the projective measurements are followed by control operations steering the system toward a pure absorbing state. In these dynamics, two types of phase transition occur as the rate of these control operations is increased: a measurement-induced entanglement transition, and a...

12. Entanglement dynamics with non-local measurements: Theoretical framework for Gaussian systems.

Giulia PICCITTO (Università degli studi di Pisa)

20/06/2023 15:25

Quantum Trajectories and Measurement Induced Phase Transitions

I will present the theory needed to apply a Gaussian-preserving operator to a fermionic Gaussian state. Then I will use this formalism to derive the equations of motions of a fermionic Kitaev chain following two different dynamic protocols, induced by the presence of the monitoring apparatus: a quantum-jump evolution with string operators and a quantum diffusion dynamics with long-range...

13. Entanglement dynamics with non-local measurements: Numerical results.

Davide ROSSINI (University of Pisa)

20/06/2023 15:50

Quantum Trajectories and Measurement Induced Phase Transitions

I will discuss some numerical results for the entanglement entropy dynamics
along the quantum trajectories of a fermionic Kitaev chain, in the presence of
measurements with a non-local character. The first part addresses a quantum-jump evolution with fixed-range string operators: a variety of behaviors emerge, ranging from volume-law, for extensive ranges of the string, to subvolume- and...

17. Magic Phase transition with Random Quantum Circuits

Crystal Noel (Duke University)

21/06/2023 12:00

Magic is a property of quantum states that enables universal fault-tolerant quantum computing using simple sets of gate operations. Understanding the mechanisms by which magic is created or destroyed is, therefore, a crucial step towards efficient and practical fault-tolerant computation. We observe that a random stabilizer code subject to coherent errors exhibits a phase transition in magic,...

23. Emergent hydrodynamics in constrained quantum matter

Michael Knap (Technical University of Munich)

21/06/2023 15:00

The far-from-equilibrium dynamics of generic interacting quantum systems is characterized by a handful of universal guiding principles, among them the diffusive transport of globally conserved quantities. Certain systems with kinetic constraints or constrained interactions, however, defy these expectations and exhibit anomalous transport instead. In this talk, we will discuss some of these...

22. Trapped-ion quantum state and process engineering using dissipation

Jonathan Home (ETH Zürich)

22/06/2023 11:00

I will discuss a number of results on quantum state engineering and dissipative control with trapped ions. Primarily this will relate to oscillator state control, where the engineering of open-system dynamics has allowed us to create a range of quantum steady-states, perform quantum error-correction using the Gottesmann-Kitaev-Preskill code, and to observe phase transitions in systems with...

18. Replica field theories for measurement transitions and random tensor networks

Adam Nahum (CNRS)

22/06/2023 11:50

I will describe how continuum field theory can in some cases give exact results for dynamical phase transitions driven by repeated measurement, and also for entanglement transitions in random tensor networks. I will discuss both free and interacting systems.

21. Complete Hilbert Space Ergodicity in Quantum Dynamics of Generalized Fibonacci Drives

Wen Wei Ho (National University of Singapore)

22/06/2023 14:30

Eigenstate thermalisation and k-designs

Ergodicity in quantum systems is often defined through statistical properties of energy eigenstates, such as Berry's conjecture for single particle chaotic systems, and the eigenstate thermalization hypothesis (ETH) for many-body systems. In this talk, I would like to pose the question whether there are quantum systems which can exhibit a stronger form of ergodicity, namely whether dynamics is...

73. Designs by Free Probability: an ETH inspired approach

Silvia PAPPALARDI (Ècole Normale Superièure, Paris)

22/06/2023 15:15

Eigenstate thermalisation and k-designs

20. Phase Transitions in Benchmarking and Mitigation of Noisy Quantum Circuits

Michael Gullans (QuICS, NIST/University of Maryland, College Park)

23/06/2023 11:00

Two central challenges in NISQ devices are the characterization and mitigation of the effects of noise. Originally introduced to analyze quantum random circuit sampling experiments, the linear cross-entropy benchmark (XEB) has emerged as a paradigmatic tool for characterizing noise in NISQ devices. A key question in the theory of XEB is whether it approximates the fidelity of the quantum...

24. Post-selection-free Measurement-Induced Phase Transition in Driven Atomic Gases with Collective Decay

Rosario Fazio (The Abdus Salam International Centre for Theoretical Physics)

23/06/2023 12:00

I will discuss the properties of a monitored ensemble of atoms driven by a laser field and in the presence of collective decay.
By varying the strength of the external drive, the atomic cloud undergoes a measurement-induced phase transition separating
two phases with entanglement entropy scaling sub-extensively with the system size. The critical point coincides with the transition
to a...

25. Coherences and fluctuations in noisy mesoscopic systems & Q-SSEP

Denis BERNARD (LPENS & CNRS)

23/06/2023 15:00

Quantum trajectories and monitoring in Gaussian models

An alternative title could have been “How to characterise fluctuations in diffusive out-of-equilibrium many-body quantum systems?” In general, the difficulty to characterise non-equilibrium systems lies in the fact that there is no analog of the Boltzmann distribution to describe thermodynamic variables and their fluctuations. Over the last 20 years, however, it was observed that fluctuations...

71. Nonlinear sigma model description of monitored Majorana dynamics

Michele Fava (Philippe Meyer Institute, Ecole Normale Superieure (ENS))

23/06/2023 15:40

Quantum trajectories and monitoring in Gaussian models

48. Full counting statistics in integrable and chaotic systems

Sarang Gopalakrishnan (Princeton University)

26/06/2023 11:00

50. Quantum gas microscopy of Hubbard models in and out of equilibrium

Johannes Zeiher

26/06/2023 12:00

Neutral atoms trapped in optical lattices are a versatile platform to study many-body physics in and out of equilibrium. Quantum gas microscopes provide an excellent toolbox to prepare, control and detect such systems at the level of individual atoms.
In the first part of my talk, I will present our recent work on implementing passively phase-stable square and triangular lattices for bosonic...

51. Kardar-Parisi-Zhang universality in a one-dimensional polariton condensate

Sylvain Ravets

26/06/2023 14:00

Cavity polaritons are hybrid exciton-photon quasi-particles emerging from the strong
coupling regime between photons confined in an optical cavity and excitons confined in
quantum wells. They present physical properties reflecting their mixed nature. From
the photon part, they inherit a small effective mass and can be confined in lattices with
typical dimensions of the order of a few...

60. Implementation of protocols for measuring the rapidities distribution of a 1D Bose gas

Lea Dubois

27/06/2023 10:30

Conference: Transport, Generalised Hydrodynamics and open systems

After relaxation, an integrable quantum system, in particular a one-dimensional gas of bosons, is characterized by the rapidities distribution, a quantity preserved throughout the dynamics. The rapidities distribution is nothing else than the asymptotic momentum distribution of particles after a one-dimensional expansion of the system. This definition is directly linked to an experimental...

61. One-particle density matrix of the out-of-equilibrium Tonks-Girardeau gas: exact results from Quantum Generalized Hydrodynamics

Stefano Scopa

27/06/2023 10:50

Conference: Transport, Generalised Hydrodynamics and open systems

Understanding the non-equilibrium dynamics of many-body quantum systems is a notoriously hard task due to the exponential increase of the Hilbert space dimension with the number of the system’s components. This prevented, for a long time, a direct comparison between theory and the available experimental measures with ultracold atoms and ions. In recent years, the advent of Generalized...

65. Emergent hydrodynamics and Pauli blocking in quasi-1D Bose gases

Frederik Skovbo Moller (TU Wien)

27/06/2023 11:10

Conference: Transport, Generalised Hydrodynamics and open systems

Confining atoms to a single line (1D) results in a system, whose elementary excitations are quasi-particles with properties that may differ significantly from the atoms; in a Bose gas, correlation effects due to interactions in 1D prevent two quasi-particle excitations from occupying the same quantum state. This imposed Pauli exclusion leads to effective fermionization of the quantum Bose gas...

69. Dynamics of charge fluctuations and symmetry-resolved entanglement

Dr Katja Klobas (University of Nottingham)

27/06/2023 12:20

Conference: Transport, Generalised Hydrodynamics and open systems

Due to its probabilistic nature, a measurement process produces a distribution of possible outcomes. This distribution — or its Fourier transform known as full counting statistics (FCS) — contains much more information than say the mean value of the measured ob- servable and accessing it is sometimes the only way to obtain relevant information about the system.
In fact, the FCS is the limit...

64. Hidden strong symmetries and quasi-local charges in a local Lindblad system

Balázs Pozsgay

27/06/2023 12:40

Conference: Transport, Generalised Hydrodynamics and open systems

We consider an open spin chain with external driving in the bulk, described by the Lindblad equation. We show that in certain cases the system can have hidden strong symmetries, in the form of quasi-local operators. These lead to conserved charges, and the existence of multiple NESS: The system will keep memory of the initial state, even though the obvious symmetries of the Hamiltonian are broken.

67. Anomalous fluctuations

Enej Ilievski (University of Ljubljana)

27/06/2023 14:30

Conference: Transport, Generalised Hydrodynamics and open systems

I will discuss several examples of non-ergodic dynamical systems with anomalous charge fluctuations.

62. Spin Transport in Perturbed Quantum Integrable Chains

Sourav Nandy

27/06/2023 14:50

Conference: Transport, Generalised Hydrodynamics and open systems

In the context of quantum transport, the XXZ (or anisotropic Heisenberg) chain is a paradigmatic many-body model, featuring a wide spectrum of spin transport behaviour at finite temperature. Although the unperturbed model is analytically solvable, understanding the effects of even weak integrability-breaking perturbations (IBP) remains an open problem. The primary aim of this talk is to...

63. TBA

Laura FOINI (CNRS)

27/06/2023 15:20

Conference: Transport, Generalised Hydrodynamics and open systems

68. Long-range correlations from Euler hydrodynamics

Takato Yoshimura

27/06/2023 15:40

Conference: Transport, Generalised Hydrodynamics and open systems

Long-range correlations have been known to exist in various situations in many-body systems. In this talk, I will show that novel hydrodynamic long-range correlations can occur in many-body systems that support ballistic transport. To describe these correlations quantitatively, I will also introduce a ballistic version of macroscopic fluctuation theory (MFT), which we call ballistic MFT (BMFT).

52. Floquet Quantum East: Localization Transition in Thermodynamic Limit

M. Tomaz Prosen

28/06/2023 11:00

We define and study the Floquet quantum east circuit model, a kinetically constrained quantum dynamics in discrete space-time, exhibiting a localization transition in infinite volume. The localization is established using perturbative arguments as well as clearly convergent TEBD (time-evolving block decimation) method in real time.

74. Projective measurements in 
highly energetic but slightly entangled 
excited States

Maurizio FAGOTTI (LPTMS)

28/06/2023 12:00

75. Dynamics of scrambling of information, from shock waves to Fisher‐KPP

Camille Aron

28/06/2023 12:30

53. Quantum Transport and cold atomic gases

Thierry Giamarchi (University of Geneva)

28/06/2023 14:30

Quantum transport of a system which is between two reservoirs, at e.g. different
chemical potentials, is one of the most common but also most important ways to put a quantum
system out of equilibrium. Such a situation is relevant not only for charge transport but also
for other transport properties such as spin transport or Hall transport for systems which are put
under a magnetic field. I...

76. KPZ

28/06/2023 16:30

58. Gas of wavepackets and an ab initio derivation of generalised hydrodynamics

Benjamin Doyon (King's College London)

29/06/2023 11:00

The hydrodynamic approximation is an extremely powerful tool to describe the behaviour of many-body systems such as gases. At the Euler scale, the approximation is based on the idea of local entropy maximisation: locally, within fluid cells, the system relaxes to a state that takes the Gibbs form. In conventional gases, these are thermal states, which include the few conserved quantities...

56. Quantum Work Statistics in Chaotic Fermion Systems

Gergely Zarand (Budapest University of Technology and Economics)

29/06/2023 12:00

We study the full distribution of quantum work in driven chaotic fermion
systems by using a random matrix approach. We find that work statistics is generically non-Gaussian.
At longer times, quantum work distribution is well-described in terms of a simple
ladder model and a symmetric exclusion process in energy space,
and bosonization and mean field methods provide accurate...

55. On the dynamics of fractional quantum Hall clouds

Iacopo Carusotto (Pitaevskii BEC Center, INO-CNR and Università di Trento)

29/06/2023 14:30

I will first present recent results on the dynamics of anyonic molecules, namely composite objects emerging from the binding of a massive impurity with a quasi-hole excitation in a fractional quantum Hall fluid. In particular, I will highlight how the angular cross section for the scattering of such polarons gives direct information on the fractional statistics in the underlying fluid. I will...

57. Fast rotation of a superfluid in a shell

Hélène Perrin (LPL/CNRS/USPN)

30/06/2023 11:00

Quantum gases provide us with a very convenient and widely tunable system for the study of superfluidity. In particular, they can be confined in a large variety of traps, enabling the study of superfluid dynamics with specific geometry. In this talk I will present the behaviour of a superfluid quantum gas confined at the surface of an ellipsoid: the atoms can move freely in directions parallel...

59. Wigner dynamics for quantum gases under inhomogeneous gain and loss processes with dephasing

M. Dragi Karevski (univ-lorraine)

30/06/2023 12:00

We present a Wigner function-based approach for the particle density evolution in fermionic and bosonic open quantum many-body systems, including the effects of dephasing. In particular, we focus on chains of noninteracting particles coupled to Lindblad baths. The dissipative processes, described by linear and quadratic jump operators, are modulated by inhomogeneous couplings. Following a...

70. Dynamics of scrambling of information, from shock waves to Fisher‐KPP

Camille Aron

Conference: Transport, Generalised Hydrodynamics and open systems

Quenched disorder slows down the scrambling of quantum information. I will
explain how conventional tools of quantum transport theory can be adapted
to derive an effective field theory of scrambling. Specifically, I'll focus
on realistic metals with both inelastic and elastic scattering, due to
interaction and disorder. I will demonstrate that disorder drives a phase
transition in the...

4. TBA

Vedika Khemani (Stanford University)

38. TBA

Vincenzo ALBA (University of Pisa)

Conference: Dissipative Many-Body Quantum Systems

49. TBA

Sarang Gopalakrishnan (Princeton University)

66. TBA

Maurizio FAGOTTI (LPTMS)

Conference: Transport, Generalised Hydrodynamics and open systems