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Entanglement and non-Markovianity of a spin-S system in a dephasing environment
Fan Zi-Long,Tian Jing,Zeng Hao-Sheng * #
Department of Physics, Hunan Normal University, Changsha 410081
*Correspondence author
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Funding: 国家自然科学基金（No.11275064,11075050）, 高等学校博士学科点专项科研基金联合资助课题 （No.20124306110003）
Opened online:31 July 2013
Accepted by: none
Citation: Fan Zi-Long,Tian Jing,Zeng Hao-Sheng.Entanglement and non-Markovianity of a spin-S system in a dephasing environment[OL]. [31 July 2013] http://en.paper.edu.cn/en_releasepaper/content/4553116
 
 
The entanglement (measured by negativity) evolution and the non-Markovianity for the dynamical process of a spin-S system embedded in dephasing environments are studied.The exact analytical solution is presented which shows that the decoherence function governs the evolutions of coherence, entanglement and the non-Markovianity of the correspondingdynamical processes. For Ohmic and sub-Ohmic reservoirs, the negativity decreases monotonically in time and the corresponding dynamics is Markovian.While for sup-Ohmic reservoirs with non-monotonic decoherence function, the negativity appears the phenomenon of revivalsand the corresponding dynamics is non-Markovian. The relation between non-Markovianity and the system dimension is studied.
Keywords:Negativity; non-Markovianity; decoherence; Ohmic-like spectrum
 
 
 

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