Dynamics of charge fluctuations from asymmetric initial states

Bruno Bertini, Katja Klobas, Mario Collura, Pasquale Calabrese, Colin Rylands

Research output: Contribution to journalArticlepeer-review

2 Downloads (Pure)

Abstract

Conserved-charge densities are very special observables in quantum many-body systems as, by construction, they encode information about the dynamics. Therefore, their evolution is expected to be of much simpler interpretation than that of generic observables and to return universal information on the state of the system at any given time. Here, we study the dynamics of the fluctuations of conserved U(1) charges in systems that are prepared in charge-asymmetric initial states. We characterize the charge fluctuations in a given subsystem using the full-counting statistics of the truncated charge and the quantum entanglement between the subsystem and the rest resolved to the symmetry sectors of the charge. We show that, even though the initial states considered are homogeneous in space, the charge fluctuations generate an effective inhomogeneity due to the charge-asymmetric nature of the initial states. We use this observation to map the problem into that of charge fluctuations on inhomogeneous, charge-symmetric states and treat it using a recently developed space-time duality approach. Specializing the treatment to interacting integrable systems we combine the space-time duality approach with generalized hydrodynamics to find explicit predictions.

Original languageEnglish
Article number184312
Number of pages28
JournalPhysical Review B
Volume109
Issue number18
DOIs
Publication statusPublished - 29 May 2024

Bibliographical note

Publisher Copyright:
© 2024 authors. Published by the American Physical Society.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Dynamics of charge fluctuations from asymmetric initial states'. Together they form a unique fingerprint.

Cite this