Decoherence of a measure of entanglement

被引：61

作者：

Tolkunov, D ^{[1
]}

Privman, V

Aravind, PK

机构：

[1] Clarkson Univ, Ctr Quantum Device Technol, Dept Phys, Potsdam, NY 13699 USA

[2] Worcester Polytech Inst, Dept Phys, Worcester, MA 01609 USA

来源：

PHYSICAL REVIEW A | 2005年 / 71卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.71.060308

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

For a solvable pure-decoherence model, we confirm by an explicit model calculation that the decay of entanglement of two two-state systems (two qubits) is approximately governed by the product of the suppression factors describing decoherence of the subsystems, provided that they are subject to uncorrelated sources of quantum noise. This demonstrates an important physical property that separated open quantum systems can evolve quantum mechanically on time scales larger than the times for which they remain entangled.

引用

页数：4

共 28 条

[1]

Abragam A., 1983, PRINCIPLES NUCL MAGN

[2]

Bennett CH, 1996, PHYS REV A, V54, P3824, DOI 10.1103/PhysRevA.54.3824

[3] Concentrating partial entanglement by local operations [J].

Bennett, CH ;

Bernstein, HJ ;

Popescu, S ;

Schumacher, B .

PHYSICAL REVIEW A, 1996, 53 (04) :2046-2052

[4]

Blum K., 2012, DENSITY MATRIX THEOR

[5] Disentanglement and decoherence by open system dynamics [J].

Dodd, PJ ;

Halliwell, JJ .

PHYSICAL REVIEW A, 2004, 69 (05) :052105-1

[6] Disentanglement by dissipative open system dynamics [J].

Dodd, PJ .

PHYSICAL REVIEW A, 2004, 69 (05) :052106-1

[7] Additivity of decoherence measures for multiqubit quantum systems [J].

Fedichkin, L ;

Fedorov, A ;

Privman, V .

PHYSICS LETTERS A, 2004, 328 (2-3) :87-93

[8] QUANTUM BROWNIAN-MOTION - THE FUNCTIONAL INTEGRAL APPROACH [J].

GRABERT, H ;

SCHRAMM, P ;

INGOLD, GL .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1988, 168 (03) :115-207

[9] Entanglement of a pair of quantum bits [J].

Hill, S ;

Wootters, WK .

PHYSICAL REVIEW LETTERS, 1997, 78 (26) :5022-5025

[10] Decoherence in a N-qubit solid-state quantum register -: art. no. 195325 [J].

Ischi, B ;

Hilke, M ;

Dubé, M .

PHYSICAL REVIEW B, 2005, 71 (19)

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