Nonlocal advantage of quantum coherence in the Heisenberg XY model

Quantum correlations in a state can be quantified from different aspects. The nonlocal advantage of quantum coherence (NAQC) captures quantum correlation stronger than entanglement and Bell nonlocality. We investigate the NAQC-type quantum correlation in the Heisenberg XY model and showed that both...

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Bibliographic Details
Published inLaser physics letters Vol. 16; no. 4; pp. 45202 - 45208
Main Authors Xie, Yu-Xia, Gao, Yun-Yue
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.04.2019
Subjects
Heisenberg model
quantum coherence
quantum correlation
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Summary:Quantum correlations in a state can be quantified from different aspects. The nonlocal advantage of quantum coherence (NAQC) captures quantum correlation stronger than entanglement and Bell nonlocality. We investigate the NAQC-type quantum correlation in the Heisenberg XY model and showed that both the anisotropy of the interaction between two spins and the external transverse magnetic field can serve as efficient parameters for tuning the NAQC-type quantum correlation. In particular, for the relative low temperature case there is a finite parameter region in which the strength of the NAQC-type quantum correlation is of about its maximum 1. We also found there are quantum states for which the NAQC-type quantum correlations defined by the l1 norm of coherence and the relative entropy of coherence have a different ordering.
Bibliography:2019LPL0170
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-202X/ab0c8f