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

作　　者：Soltani M R Mahdavifar S Mahmoudi M 

机构地区：[1]Department of Physics, College of Science, Yadegar-e-Imam Khomeini (RAH) Shahre-Rey Branch, Islamic Azad University [2]Department of Physics, University of Guilan

出　　处：《Chinese Physics B》2016年第8期369-372,共4页中国物理B（英文版）

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.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 

分 类 号：O413[理学—理论物理]