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

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

中国物理B ›› 2016, Vol. 25 ›› Issue (8): 87501-087501.doi: 10.1088/1674-1056/25/8/087501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

Soltani M R, Mahdavifar S, Mahmoudi M

1 Department of Physics, College of Science, Yadegar-e-Imam Khomeini(RAH) Shahre-Rey Branch, Islamic Azad University, Tehran, Iran;
2 Department of Physics, University of Guilan, 41335-1914, Rasht, Iran

收稿日期:2016-02-02 修回日期:2016-03-08 出版日期:2016-08-05 发布日期:2016-08-05
通讯作者: Soltani M R E-mail:soltani@iausr.ac.ir

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

Soltani M R¹, Mahdavifar S², Mahmoudi M²

1 Department of Physics, College of Science, Yadegar-e-Imam Khomeini(RAH) Shahre-Rey Branch, Islamic Azad University, Tehran, Iran;
2 Department of Physics, University of Guilan, 41335-1914, Rasht, Iran

Received:2016-02-02 Revised:2016-03-08 Online:2016-08-05 Published:2016-08-05
Contact: Soltani M R E-mail:soltani@iausr.ac.ir

摘要/Abstract

摘要： 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.

关键词: entanglement, Ising model, DM interaction, negativity, long range interaction

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.

Key words: entanglement, Ising model, DM interaction, negativity, long range interaction

中图分类号: (Quantized spin models, including quantum spin frustration)

75.10.Jm

75.10.Pq (Spin chain models)

Soltani M R, Mahdavifar S, Mahmoudi M. Entanglement in a two-spin system with long-range interactions[J]. 中国物理B, 2016, 25(8): 87501-087501.

Soltani M R, Mahdavifar S, Mahmoudi M. Entanglement in a two-spin system with long-range interactions[J]. Chin. Phys. B, 2016, 25(8): 87501-087501.

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

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

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