Entanglement and decoherence of coupled superconductor qubits in a non-Markovian environment

被引：17

作者：

Ji Ying-Hua ^{[1
,2
]}

Hu Ju-Ju ^{[1
,3
]}

机构：

[1] Jiangxi Normal Univ, Coll Phys & Commun Elect, Nanchang 330022, Peoples R China

[2] Key Lab Optoelect & Telecommun Jiangxi, Nanchang 330022, Peoples R China

[3] Shanghai Univ Sci & Technol, Sch Opt Elect Informat & Comp Engn, Shanghai 200093, Peoples R China

来源：

CHINESE PHYSICS B | 2010年 / 19卷 / 06期

基金：

中国国家自然科学基金;

关键词：

entanglement; coupled qubits; non-Markovian process; concurrence; GEOMETRIC PHASE; QUANTUM COMPUTATION; SUDDEN-DEATH; STATES; DYNAMICS; SYSTEM; GATE;

D O I：

10.1088/1674-1056/19/6/060304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The sudden death of entanglement is investigated for the non-Markovian dynamic process of a pair of interacting flux qubits under a thermal bath. The results show that, for initially two-qubit entangled states, entanglement sudden death (ESD) always happens in the thermal reservoir, where its appearance strongly depends on the environment. In particular, ESD of the qubits occurs more easily for the non-Markovian process than for the Markovian one.

引用

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