Remanent quantum correlations in dissipative qubits

被引：4

作者：

Nizama, Marco

Caceres, Manuel O. ^{[1
]}

机构：

[1] Inst Balseiro, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2013年 / 392卷 / 23期

关键词：

Quantum Walk; Master equation; Non-Markovian decoherence; Quantum correlations; Qubits; RANDOM-WALKS; ENTANGLEMENT; DECOHERENCE; MODEL;

D O I：

10.1016/j.physa.2013.07.055

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Starting from the exact evolution of a Markovian dissipative quantum walk, a non-Markovian decoherence of two qubits interacting with a phonon thermal bath has been investigated analytically using quantum information tools. Concurrence and quantum discord are affected in a complex way, showing that entanglement decreases with dissipation. At the limit where dissipation dominates, quantum correlations survive in time as proportional to t(-1/2). Thus, even under the influence of dissipation, two qubits retain their quantumness for a long time. Quantum correlations could be therefore observed for a long time in related photonic experiments. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：6155 / 6160

页数：6

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