Entanglement, purity and fidelity in the anisotropy (1/2,1) mixed-spin system

Zhe Sun, Xiaoguang Wang and Heng-Na Xiong

Physica A: Statistical Mechanics and its Applications, 2009, vol. 388, issue 7, 1337-1343

Abstract: We study entanglement, purity and fidelity in the anisotropy (1/2,1) mixed-spin Heisenberg chain. We find that negativity, as a measure of entanglement, displays a dip at the SU(2) isotropic point of the system, which is in contrast to the peak appearance of concurrence in the spin-1/2 XXZ chain. Moreover, at the isotropic point, purity gives a minimum, while the mixed-state fidelity susceptibility emerges a maximum.

Keywords: Entanglement; Purity; Fidelity (search for similar items in EconPapers)
Date: 2009
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:388:y:2009:i:7:p:1337-1343

DOI: 10.1016/j.physa.2008.12.054

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