This article is cited in 3 papers

QUANTUM INFORMATION SCIENCE

Effect of anisotropy on the entanglement of quantum states in a spin chain

P. F. Kartsev, V. A. Kashurnikov

Moscow Engineering Physics Institute (State University)

Abstract: The effect of the anisotropy of the interaction of a spin chain in the XXZ Heisenberg model on the concurrence of the states of neighboring sites is studied. When anisotropy increases, the maximum concurrence in a magnetic field increases above the value reached in the absence of the field. The maximum magnetic field allowing entanglement is linearly related to the anisotropy parameter.

PACS: 03.65.Ud, 73.43.Nq, 75.10.Pq, 75.30.Gw

Received: 28.06.2004
Revised: 05.08.2004

 English version: Journal of Experimental and Theoretical Physics Letters, 2004, 80:6, 441–444

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