物理学报2011，Vol.60Issue(3)：50-55,6.
Dzyaloshinskii-Moriya相互作用对量子XY链中热纠缠的影响
The effect of Dzyaloshinskii-Moriya interaction on entanglement in one-dimensional XY spin model
摘要
Abstract
The effects of Dzyaloshinskii-Moriya ( DM ) interaction on the thermal entanglement of mixed-spin XY chain ( 1/2,3/2) and spin 1 XY chain are investigated through negativity.By calculating the entanglement between two particles, it was found that the DM interaction can not only increase the entanglement, but also make the entanglement of the particles reach a stationary value.The higher the temperature, the greater the DM interaction is required to make the thermal entanglement arrive at this stationary value.Under the same condition, the entanglement between two spin 1 particles is less than that between mixed-spin.The exchange-coupling interactions between the spins are helpful to strengthen the thermal entanglement, hence the exchange-coupling can be used to modulate the entanglement along with the DM interaction.When the exchange-coupling interaction is small, one can enlarge the DM interaction to increase the entanglement, whereas, when the DM interaction is small, one can increase the thermal entanglement through increasing the exchange-coupling interaction.关键词
量子纠缠/XY模型/negativity/Dzyaloshinskii-Moriya相互作用Key words
entanglement/ XY spin chain/ negativity/ Dzyaloshinskii-Moriya interaction引用本文复制引用
刘圣鑫,李莎莎,孔祥木..Dzyaloshinskii-Moriya相互作用对量子XY链中热纠缠的影响[J].物理学报,2011,60(3):50-55,6.基金项目
国家自然科学基金(批准号:10775088)资助的课题. （批准号:10775088）
