Entanglement Dynamics and Transfer for Two-Qubit Werner-Like States in Markovian Environments

We investigate entanglement dynamics and transfer in a system of two identical independent qubits, each of them locally interacting with a bosonic reservoir. Starting from two-qubit extended Werner-like states, we have shown that the degree of entanglement of the initial states, Markovian environmen...

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Bibliographic Details
Published inInternational journal of theoretical physics Vol. 49; no. 6; pp. 1212 - 1221
Main Authors Zhang, Xiu-Xing, Sun, Guang-Hou, Yin, Xun-Chang, Shan, Chuan-Jia
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.06.2010
Subjects
Elementary Particles
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum Field Theory
Quantum Physics
Theoretical
Entanglement dynamics
Werner-like states
Markovian environments
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Summary:We investigate entanglement dynamics and transfer in a system of two identical independent qubits, each of them locally interacting with a bosonic reservoir. Starting from two-qubit extended Werner-like states, we have shown that the degree of entanglement of the initial states, Markovian environments and the purity can control the time of the two-qubit entanglement sudden death and the reservoirs’ entanglement sudden birth. Moreover, the phenomenon of entanglement sudden death/birth may occur depending on the values of parameters like purity or degree of entanglement of the initial state. When initial states are not pure, entanglement sudden death/birth always occurs, this will permit us to link the occurrence time of entanglement sudden death/birth and entanglement transfer to the purity or the degree of entanglement of the initial states.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-010-0301-x