Disentanglement of two-qubit system in the Bloch channel

被引：1
|
作者：
Ban, Masashi [1 ]
机构：
[1] Ochanomizu Univ, Grad Sch Human & Sci, Bunkyo Ku, Tokyo 1128610, Japan
来源：
OPTICS COMMUNICATIONS | 2010年 / 283卷 / 19期
关键词：
Entanglement; Decoherence; Relaxation time; QUANTUM INFORMATION; BELL INEQUALITY; SUDDEN-DEATH; ENTANGLEMENT; DECOHERENCE; STATES;
D O I：
10.1016/j.optcom.2010.05.030
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Disentanglement of two qubits is studied in the relaxation process characterized by the longitudinal and transversal relaxation times, T-1 and T-2, which satisfy the inequality T-2 <= 2T(1) due to the complete positivity of the time-evolution. In the case of sufficiently low temperature, it is shown that whether the equality T-2 = 2T(1) is satisfied or not is of essential importance in the finite-time disentanglement. This is the characteristic feature of entanglement. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：3812 / 3817
页数：6
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