Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1538860 | Optics Communications | 2009 | 6 Pages |
Abstract
We investigate the entanglement dynamics and decoherence of a two-qubit system under a quantum spin environment at finite temperature in the thermodynamics limit. For the case under study, we find different initial states will result in different entanglement evolution, what deserves mentioning here is that the state |Ψã=cosα|01ã+sinα|10ã is most robust than other states when Ï/2<α<Ï, since the entanglement remains unchanged or increased under the spin environment. In addition, we also find the anisotropy parameter Î can suppress the destruction of decoherence induced by the environment, and the undesirable entanglement sudden death arising from the process of entanglement evolution can be efficiently controlled by the inhomogeneous magnetic field ζ.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Jin-Liang Guo, He-Shan Song,