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

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.

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Year of publication:	2009
Authors:	Sun, Zhe ; Wang, Xiaoguang ; Xiong, Heng-Na
Published in:	Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 388.2009, 7, p. 1337-1343
Publisher:	Elsevier
Subject:	Entanglement \| Purity \| Fidelity

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Type of publication:	Article
Source:	RePEc - Research Papers in Economics

Persistent link: https://www.econbiz.de/10010871693