物理学报2016，Vol.65Issue(17)：170301-0-170301-9,10.DOI:10.7498/aps.65.170301
在不同初态下Dzyaloshinskii-Moriya相互作用及内禀退相干对海森伯系统的量子纠缠的影响∗
Effects of Dzyaloshinskii-Moriya interacton and decoherence on entanglement dynamics in Heisenb erg spin chain system with different initial states
摘要
Abstract
With considering the intrinsic decoherence, the dynamic behaviors of quantum entanglement in a three-qubit XXZ Heisenberg system with Dzyaloshinskii-Moriya (DM) interaction and anisotropy for different initial states are investigated. The research result shows that the anisotropy parameter does not affect the system entanglement, however, the intrinsic decoherence has obvious inhibitory effect on entanglement. When the initial state of system is an entangled state, we can obtain the stable value of entanglement by adjusting DM interaction parameters appropriately. As the system initial state is a separation state, entanglement oscillates, and the amplitude of oscillation decays with time periodically, and there will appear the death phenomenon after each oscillation, and with time going on, its concurrence will be zero. When the initial state is entangled, by choosing the proper DM parameter, the three pairs of entanglements oscillate with time and eventually approach to a steady value. The increase of γ accelerates the decay of concurrence. When the initial state is separated, entanglement oscillates, and the amplitude of oscillation decays with time periodically, and there will appear the death phenomenon after each oscillation, with time going on, its concurrence will be zero. Therefore, the proper initial state and DM interaction parameters can control the concurrence effectively under the intrinsic decoherence, thereby obtaining the preferable entanglement resource.关键词
量子纠缠/内禀退相干/初态/Dzyaloshinskii-Moriya相互作用Key words
quantum entanglement/intrinsic decoherence/initial state/Dzyaloshinskii-Moriya interaction引用本文复制引用
丛美艳,杨晶,黄燕霞..在不同初态下Dzyaloshinskii-Moriya相互作用及内禀退相干对海森伯系统的量子纠缠的影响∗[J].物理学报,2016,65(17):170301-0-170301-9,10.基金项目
国家自然科学基金重大研究计划(批准号:2012CB922100)和湖北省自然科学基金(批准号:2011CDC010)资助的课题 （批准号:2012CB922100）
