Entanglement dynamics of a three-qubit system interacting with a quantum spin environment

Jin-Liang Guo, Jia-Sen Jin and He-Shan Song

Physica A: Statistical Mechanics and its Applications, 2009, vol. 388, issue 17, 3667-3674

Abstract: We investigate the entanglement dynamics and decoherence of a three-qubit system under a quantum spin environment at a finite temperature in the thermodynamics limit. For the case under study, we find the evolution of pairwise entanglement depends not only on the initial states but also on the parameters related to the system and the spin environment. In addition, an undesirable entanglement sudden death occurs in the process of entanglement evolution, and this effect can be controlled by the coupling constant between two qubits, external magnetic field, and the interaction between the system and the environment.

Keywords: Pairwise entanglement; Dynamic evolution; Concurrence (search for similar items in EconPapers)
Date: 2009
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:388:y:2009:i:17:p:3667-3674

DOI: 10.1016/j.physa.2009.04.041

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