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

页码：3812 / 3817

页数：6

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