Protecting entanglement by detuning： in Markovian environments vs in non-Markovian environments

The models of two qubits separately trapped in two independent Markovian or non-Markovian environments have been investigated. The distinction of the two-qubit entanglement dynamics in different environments has also been discussed in detail. The results show that, in non-Markovian environments, the...

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Bibliographic Details
Published in:Chinese physics B 2010-09, Vol.19 (9), p.178-182
Main Author: 黄利元 方卯发
Format: Article
Language:English
Subjects:
Dynamics
Entanglement
Holes
Qubits (quantum computing)
记忆效应
量子比特
量子纠缠
马尔可夫环境
马氏环境
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Summary:The models of two qubits separately trapped in two independent Markovian or non-Markovian environments have been investigated. The distinction of the two-qubit entanglement dynamics in different environments has also been discussed in detail. The results show that, in non-Markovian environments, the possible usage time of entanglement can be extended due to its memory effect. On the other hand, we note that, compared to Markovian environments, the two-qubit entanglement could be protected better in non-Markovian environments by modulating the detuning between qubits and cavities. Finally, an intuitive physicM interpretation for these results is given.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/19/9/090318