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.

Entanglement Entropy of One-Dimensional Gases / Calabrese, Pasquale; Mintchev, M; Vicari, E.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 107:2(2011), pp. 1-4. [10.1103/PhysRevLett.107.020601]

Entanglement Entropy of One-Dimensional Gases

Calabrese, Pasquale;
2011-01-01

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.
2011
107
2
1
4
020601
Calabrese, Pasquale; Mintchev, M; Vicari, E.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/12789
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