Entanglement sudden death in band gaps

被引：17

作者：

Zhang, Y. J. ^{[1
]}

Man, Z. X. ^{[1
]}

Xia, Y. J. ^{[1
]}

Guo, G. C. ^{[2
]}

机构：

[1] Qufu Normal Univ, Dept Phys, Shandong Prov Key Lab Laser Polarizat & Informat, Qufu 273165, Peoples R China

[2] Univ Sci & Technol China, Dept Phys, Key Lab Quantum Informat, Hefei 230026, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL D | 2010年 / 58卷 / 03期

基金：

中国国家自然科学基金;

关键词：

SPONTANEOUS EMISSION; ATOM; DISENTANGLEMENT; DECOHERENCE; DYNAMICS; PHOTON; QUBITS; CAVITY; DECAY;

D O I：

10.1140/epjd/e2010-00087-6

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Using the pseudomode method, we evaluate exactly time-dependent entanglement for two independent qubits, each coupled to a non-Markovian structured environment. Our results suggest a possible way to retard entanglement sudden death by modifying the qubit-pseudomode detuning and the spectrum of the reservoirs. Particularly, in environments structured by a model of a density-of-states gap which has two poles, entanglement trapping and prevention of entanglement sudden death occur in the weak-coupling regime.

引用

页码：397 / 401

页数：5

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