Two-qubit entanglement dynamics in a symmetry-broken environment

被引：68

作者：

Lucamarini, M ^{[1
]}

Paganelli, S

Mancini, S

机构：

[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[2] Univ Bologna, Dipartmento Fis, I-40126 Bologna, Italy

[3] Univ Camerino, Dipartimento Fis, I-62032 Camerino, Italy

来源：

PHYSICAL REVIEW A | 2004年 / 69卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.69.062308

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the temporal evolution of entanglement pertaining to two qubits interacting with a thermal bath. In particular we consider the simplest nontrivial spin bath models where symmetry breaking occurs and treat them by mean field approximation. We analytically find decoherence free entangled states as well as entangled states with an exponential decay of the quantum correlation at finite temperature.

引用

页码：062308 / 1

页数：8

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