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The entanglement entropy of one-dimensional gases

By Pasquale Calabrese, Mihail Mintchev and Ettore Vicari

Abstract

We introduce a systematic framework to calculate the bipartite entanglement entropy of a spatial subsystem in a one-dimensional quantum gas which can be mapped into a noninteracting fermion system. To show the wide range of applicability of the proposed formalism, we use it for the calculation of the entanglement in the eigenstates of periodic systems, in a gas confined by boundaries or external potentials, in junctions of quantum wires and in a time-dependent parabolic potential

Topics: FIS/02 - Fisica teorica, modelli e metodi matematici
Publisher: 'American Physical Society (APS)'
Year: 2011
DOI identifier: 10.1103/PhysRevLett.107.020601
OAI identifier: oai:eprints.adm.unipi.it:1860
Provided by: UnipiEprints
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