Bruno Bertini (Author), Maurizio Fagotti (Author), Lorenzo Piroli (Author), Pasquale Calabrese (Author)

Abstract

The large-scale properties of homogeneous states after quantum quenches in integrable systems have been successfully described by a semiclassical picture of moving quasiparticles. Here we consider the generalisation for the entanglement evolution after an inhomogeneous quench in noninteracting systems in the framework of generalised hydrodynamics. We focus on the protocol where two semi-infinite halves are initially prepared in different states and then joined together, showing that a proper generalisation of the quasiparticle picture leads to exact quantitative predictions. If the system is initially prepared in a quasistationary state, we find that the entanglement entropy is additive and it can be computed by means of generalised hydrodynamics. Conversely, additivity is lost when the initial state is not quasistationary; yet the entanglement entropy in the large-scale limit can be exactly predicted in the quasiparticle picture, provided that the initial state is low entangled.

Keywords

neravnovesna dinamika;večdelčni sistemi;kvantna prepletenost;kvantni transport;non-equilibrium dynamics;many-body systems;quantum entanglement;quantum transport;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 530.145
COBISS: 3265380 Link will open in a new window
ISSN: 1751-8113
Views: 671
Downloads: 344
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Other data

Secondary language: Slovenian
Secondary keywords: neravnovesna dinamika;večdelčni sistemi;kvantna prepletenost;kvantni transport;
Embargo end date (OpenAIRE): 2019-08-24
Pages: 12 str.
Volume: ǂVol. ǂ51
Issue: ǂart. no. ǂ39LT01
Chronology: Aug. 2018
DOI: 10.1088/1751-8121/aad82e
ID: 10983888