Entanglement in a two-spin system with long-range interactions

doi:10.1088/1674-1056/25/8/087501

Abstract The quantum entanglement between two spins in the Ising model with an added Dzyaloshinsky-Moriya (DM) interaction and in the presence of the transverse magnetic field is studied. The exchange interaction is considered as a function of the distance between spins. The negativity as a function of magnetic field, exchange and DM interaction is calculated. The effect of the distance between spins is studied based on the negativity. In addition, the effect of the thermal fluctuation on the negativity is also investigated.

Keywords: entanglement Ising model DM interaction negativity long range interaction

Received: 02 February 2016
Revised: 08 March 2016
Accepted manuscript online:

PACS:	75.10.Jm	(Quantized spin models, including quantum spin frustration)
	75.10.Pq	(Spin chain models)

Corresponding Authors: Soltani M R
E-mail: soltani@iausr.ac.ir

Cite this article:

Soltani M R, Mahdavifar S, Mahmoudi M Entanglement in a two-spin system with long-range interactions 2016 Chin. Phys. B 25 087501

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