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Entanglement quantifiers, entanglement crossover and phase transitions

Cavalcanti, D. and Brandão, F. G. S. L. and Terra Cunha, M. O. (2006) Entanglement quantifiers, entanglement crossover and phase transitions. New Journal of Physics, 8 (10). Art. No. 260. ISSN 1367-2630.

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Entanglement has been widely used as a tool for the investigation of phase transitions (PTs). However, analysing several entanglement measures in the two-qubit context, we see that distinct entanglement quantifiers can indicate different orders for the same PT. Examples are given for different Hamiltonians. This leaves open the possibility of addressing different orders to the same PT if entanglement is used as an order parameter. Moving on to the multipartite context, we show necessary and sufficient conditions for a family of entanglement monotones to confirm quantum PTs.

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Brandão, F. G. S. L.0000-0003-3866-9378
Additional Information:© 2006 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Articles submitted prior to November 2012 the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA version 3.0) licence. Received 16 March 2006. Published 27 October 2006. We thank R Dickman and V Vedral for valuable discussions on the theme. Financial support from PRPq-UFMG and CNPq-Brazil is also acknowledged. This work is part of the Brazilian Millennium Project for Quantum Information.
Funding AgencyGrant Number
Universidade Federal de Minas Gerais (UMFG)UNSPECIFIED
Pró-Reitoria de Pesquisa (PRPq)UNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Institutos do Milênio-Informação Quântica (MCT)UNSPECIFIED
Issue or Number:10
Record Number:CaltechAUTHORS:20160607-094020846
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Official Citation:D Cavalcanti et al 2006 New J. Phys. 8 260
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67714
Deposited By: George Porter
Deposited On:07 Jun 2016 17:35
Last Modified:03 Oct 2019 10:08

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