Entanglement distribution over the subsystems and its invariance

Details Entanglement distribution over the subsystems and its invariance Entanglement distribution over the subsystems and its invariance

2010-05-06

arxiv.org/abs/1005.1001v2

Quantu. Inf. Comput. 11, 0874 (2011)

Physics

Quantum Physics

6 pages, 5 figures

Scientific paper

We study the entanglement dynamics of two qubits, each of which is embedded into its local amplitude-damping reservoir, and the entanglement distribution among all the bipartite subsystems including qubit-qubit, qubit-reservoir, and reservoir-reservoir. It is found that the entanglement can be stably distributed among all components, which is much different to the result obtained under the Born-Markovian approximation by C. E. L\'{o}pez {\it et al.} [Phys. Rev. Lett. \textbf{101}, 080503 (2008)], and particularly it also satisfies an identity. Our unified treatment includes the previous results as special cases. The result may give help to understand the physical nature of entanglement under decoherence.

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