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Lea Dubois6/27/23, 10:30 AM
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...
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Stefano Scopa6/27/23, 10:50 AM
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...
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Frederik Skovbo Moller (TU Wien)6/27/23, 11:10 AM
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...
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Dr Katja Klobas (University of Nottingham)6/27/23, 12:20 PM
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.
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In fact, the FCS is the limit... -
Balázs Pozsgay6/27/23, 12:40 PM
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.
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Enej Ilievski (University of Ljubljana)6/27/23, 2:30 PM
I will discuss several examples of non-ergodic dynamical systems with anomalous charge fluctuations.
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Sourav Nandy6/27/23, 2:50 PM
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...
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Laura FOINI (CNRS)6/27/23, 3:20 PM
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Takato Yoshimura6/27/23, 3:40 PM
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).
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Camille Aron
Quenched disorder slows down the scrambling of quantum information. I will
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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... -
Maurizio FAGOTTI (LPTMS)
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