Correlation and nonlocality measures as indicators of quantum phase transitions in several critical systems

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Küçük Resim

Tarih

2012

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Academic Press Inc Elsevier Science

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

We have investigated the quantum phase transitions in the ground states of several critical systems, including transverse field Ising and XY models as well as XY with multiple spin interactions, XXZ and the collective system Lipkin-Meshkov-Glick models, by using different quantumness measures, such as entanglement of formation, quantum discord, as well as its classical counterpart, measurement-induced disturbance and the Clauser-Horne-Shimony-Holt-Bell function. Measurement-induced disturbance is found to detect the first and second order phase transitions present in these critical systems, while, surprisingly, it is found to fail to signal the infinite-order phase transition present in the XXZ model. Remarkably, the Clauser-Horne-Shimony-Holt-Bell function is found to detect all the phase transitions, even when quantum and classical correlations are zero for the relevant ground state. (C) 2012 Elsevier Inc. All rights reserved.

Açıklama

Anahtar Kelimeler

Quantum Phase Transitions, Quantum Discord, Entanglement, Measurement Induced Disturbance, Bell Nonlocality

Kaynak

Annals Of Physics

WoS Q Değeri

Q1

Scopus Q Değeri

Q1

Cilt

327

Sayı

12

Künye