噪声环境中两粒子纠缠态的纠缠消相干  

Entanglement decoherence of two-particle entangled states in a noisy environment

作　　者：向少华[1] 宋克慧[2] 

机构地区：[1]怀化学院物理与电子信息科学系,怀化418008 [2]怀化学院信息科学研究所,怀化418008

出　　处：《物理学报》2006年第2期529-534,共6页Acta Physica Sinica

摘　　要：借助于共生纠缠度和输入输出保真度考察了初始处于纠缠态的两粒子在联合噪声环境中的消纠缠特性.结果表明:两粒子纠缠态可分为相干保持态和脆弱纠缠态.对于脆弱纠缠态分析了它们在低温条件欧姆型耗散下的纠缠消相干演化动力学.Entanglement decoherence of two particles interacting with the same environment is investigated by means of concurrence and the input-output fidelity. It is found that the entangled states of two-particle system can be divided into two kinds, coherence-preserving states and fragile entangled states. The dynamics of entanglement decoherence for fragile entangled states is discussed by taking into account the ohmic dissipation under the low temperature approximation.

关 键 词：热库 相干保持态 脆弱纠缠态 输入输出保真度 

分 类 号：O413.1[理学—理论物理] TN912.34[理学—物理]