Z. Naturforsch. 68a, 272 – 278 (2013)
The Correlated Environments Depress Entanglement Decoherence in the Dimer System
Qin-Sheng Zhu1, Chuan-Ji Fu1, and Wei Lai2
1 Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, P.R.China
2 Experimental Middle School of Chengdu Economic and Technology Development Zone, Chengdu 610054, China
Received August 13, 2012 / revised October 7, 2012 / published online January 23, 2013
Reprint requests to: Q.-S. Z.; E-mail: zhuqinsheng@gmail.com
In this work, the decoherence properties of two independent dimer systems coupled to two correlated Fermi-spin environments is investigated under the non-Markovian condition. We demonstrate that the correlated spin bath can effectively depress the entanglement decoherence, and a steady entanglement can be achieved when the coupling parameter q exceeds a critical value. This result shows a possible method of the entanglement preservation in decohering environments.
Key words: Decoherence; Entanglement; Quantum Noise.
PACS numbers: 03.65.Yz; 03.67.Bg; 42.50.Lc; 03.65.Ud
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