Macroscopic effects from local perturbations in quantum spin chains
Saverio Bocini
| When |
Nov 23, 2023
from 02:00 to 03:00 |
|---|---|
| Where | amphithéâtre Physique et Chimie |
| Attendees |
Saverio Bocini |
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Jeudi 23 Novembre
Title: Macroscopic effects from local perturbations in quantum spin chains
Saverio Bocini (LP, ENS de Lyon)
Abstract:
We investigate the non-equilibrium dynamics of integrable quantum spin chains governed by translationally-invariant Hamiltonians with short-range interactions. Our focus is particularly on initial states with localized inhomogeneities. Although such scenarios are often addressed by Generalized hydrodynamics (GHD), we consider specific setups that go beyond this framework.
In this presentation, we delve into two distinct cases where minimal modifications, such as a spin flip, of an otherwise stationary initial state can induce a global reconfiguration of the spin chain. We specifically examine this phenomenon in the context of quantum jammed states and quantum scars. The dynamical behavior of the spin chain can not be predicted solely relying on the knowledge of local conservation laws, making these setups particularly intriguing to study the limitations of the GHD framework.