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Reference: Rieper, E, Anders, J and Vedral, V, (2010). Entanglement at the quantum phase transition in a harmonic lattice. New Journal of Physics, 12 (2), Article: 025017.Citable link to this page:


Entanglement at the quantum phase transition in a harmonic lattice

Abstract: The entanglement properties of phase transition in a twodimensional harmonic lattice, similar to the one observed in recent ion trap experiments, are discussed for both finite number of particles and thermodynamical limit. We show that for the ground state at the critical value of the trapping potential, two entanglement measures, the negativity between two neighbouring sites and the block entropy for blocks of size 1, 2 and 3, change abruptly. Entanglement thus indicates quantum phase transitions in general, not only in the finite-dimensional case considered inWu et al (2004 Phys. Rev. Lett. 93 250404). Finally, we consider the thermal state and compare its exact entanglement with a temperature entanglement witness introduced in Anders (2008 Phys. Rev. A 77 062102). © IOP Publishing Ltd. and Deutsche Physikalische Gesellschaft.

Peer Review status:Peer reviewedPublication status:PublishedVersion:Publisher's versionNotes:Copyright IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Authors, their institutions and third parties all have the same rights to reuse articles published in New Journal of Physics in accordance with the Creative Commons Attribution 3.0 Unported (CC-BY) license. This allows the articles to be shared, adapted and made commercial use of subject to appropriate attribution.

Bibliographic Details

Publisher: IOP Publishing

Publisher Website: http://ioppublishing.org/

Journal: New Journal of Physicssee more from them

Publication Website: http://iopscience.iop.org/1367-2630

Issue Date: 2010-02

pages:Article: 025017Identifiers

Urn: uuid:6b47c585-9207-4329-be4a-97d220d9ef66

Source identifier: 158766

Eissn: 1367-2630

Doi: https://doi.org/10.1088/1367-2630/12/2/025017

Issn: 1367-2630 Item Description

Type: Journal article;

Language: eng

Version: Publisher's version Tiny URL: pubs:158766


Autor: Rieper, E - - - Anders, J - - - Vedral, V - institutionUniversity of Oxford Oxford, MPLS, Physics, REF-Physics fundingEngineering

Fuente: https://ora.ox.ac.uk/objects/uuid:6b47c585-9207-4329-be4a-97d220d9ef66


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