Finite-temperature decoherence of spin states in a {Cu3} single molecular magnet

Finite-temperature decoherence of spin states in a {Cu3} single molecular magnet
复制标题

{Cu3}单分子磁体中自旋态的有限温度退相干

DOI:
10.1088/0953-4075/46/2/025502
复制
发表时间:
2013-01
期刊:
Journal of Physics B: Atomic, Molecular and Optical Physics
影响因子:
--
通讯作者:
郝翔
郝翔
中科院分区:
其他
文献类型:
--
作者:
郝翔

文献摘要

参考文献

相似文献

我们研究了单个分子磁体在局域电场中自旋态的量子演化。用自旋-玻色子模型分析了热玻色子环境中弱耦合的单分子磁体的退相干。利用有限温度无时间卷积的量子主方程,得到了系统在长期近似下的约化密度矩阵的解析表达式。通过手性自旋极化在环境关联时间的时间尺度上的振荡来表示自旋态的抑制和恢复的动力学行为。通过操纵局域电场和环境谱密度函数,可以有效地抑制量子退相干。在耗散的影响下,计算了由von Neumann熵测量的指针态,以反映系统-环境模型的纠缠性质。
We investigate the quantum evolution of spin states of a single molecular magnet in a local electric field. The decoherence of a {Cu3} single molecular magnet weakly coupled to a thermal bosonic environment can be analysed by the spin-boson model. Using the finite-temperature time-convolutionless quantum master equation, we obtain the analytical expression of the reduced density matrix of the system in the secular approximation. The suppressed and revived dynamical behaviour of the spin states are presented by the oscillation of the chirality spin polarization on the time scale of the correlation time of the environment. The quantum decoherence can be effectively restrained with the help of the manipulation of a local electric field and the environment spectral density function. Under the influence of the dissipation, the pointer states measured by the von Neumann entropy are calculated to manifest the entanglement property of the system–environment model.
DOI: 10.1103/physrevb.74.233102
发表时间: 2006-09
期刊: Physical Review B
影响因子: 3.7
作者:
Jize Zhao;K. Ueda;Xiaoqun Wang
通讯作者: Jize Zhao;K. Ueda;Xiaoqun Wang
DOI: 10.1038/nature07951
发表时间: 2009-04-23
期刊: NATURE
影响因子: 64.8
作者:
Biercuk, Michael J.;Uys, Hermann;Bollinger, John J.
通讯作者: Bollinger, John J.
DOI: 10.1017/cbo9781139207249.009
发表时间: 2012
期刊: --
影响因子: --
作者:
W. Marsden
通讯作者: W. Marsden
DOI: 10.1103/physrevlett.104.037203
发表时间: 2010-01-22
影响因子: 8.6
作者:
Candini, A.;Lorusso, G.;Affronte, M.
通讯作者: Affronte, M.
DOI: 10.1103/physrevlett.98.057201
发表时间: 2007-02-02
影响因子: 8.6
作者:
Ardavan, Arzhang;Rival, Olivier;Winpenny, Richard E. P.
通讯作者: Winpenny, Richard E. P.