Entanglement dynamics of a three-qubit system interacting with a quantum spin environment |
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Authors: | Jin-Liang Guo Jia-Sen Jin He-Shan Song |
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Affiliation: | School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China |
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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. |
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Keywords: | 03.65.Ud 03.67.Mn 75.10.Jm |
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