Thermal quantum and classical correlations and entanglement in the XY spin model with three-spin interaction

Journal Article · Sun May 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.052323· OSTI ID:21546740

Yanchao, Li; Haiqing, Lin ^[1]

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1. Beijing Computational Science Research Center, Beijing 100084 (China)

Pairwise quantum discord (QD) and classical correlation (CC) are studied in the XY spin chain with three-spin interaction. We analyze their capability in detecting quantum phase transitions (QPTs) at both zero and finite temperatures and find that the pairwise QD of two neighboring spins is more reliable than that of any other distances in identifying QPTs. Both the QD and CC detect quantum critical points associated with first- and higher-order QPTs caused by field and three-spin interactions at finite temperatures. In addition, we find a different finite-size scaling behavior for QD from previous reports for the transverse field Ising case and show some interesting phenomena of QD and entanglement of formation for finite temperatures.

• OSTI ID: 21546740
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR MOMENTUM
CORRELATIONS
CRYSTAL MODELS
DISTANCE
INTERACTIONS
ISING MODEL
MANY-BODY PROBLEM
MATHEMATICAL MODELS
PARTICLE PROPERTIES
PHASE TRANSFORMATIONS
QUANTUM ENTANGLEMENT
SCALING
SPIN
THREE-BODY PROBLEM