Decoherence in a spin spin-bath model with environmental self-interaction
Decoherence in a spin spin-bath model with environmental self-interaction
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DOI：
10.1088/0305-4470/36/49/012
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发表时间：
2002-09
期刊：
影响因子：
--
通讯作者：
L. Tessieri;J. Wilkie
中科院分区：
文献类型：
--
作者：
L. Tessieri;J. Wilkie
研究了一个由中心自旋与自旋槽耦合组成的低温模型系统，以确定自旋槽之间的相互作用是否对中心自旋动力学有影响。在没有环境内耦合的情况下，中心自旋的退相干是快速且不可逆的。强的环境内相互作用导致了中心自旋与镀液的有效解耦和退相干的抑制。较弱的环境内耦合减少但不消除退相干。我们认为，在硅或金刚石中的He杂质的电子态中应该观察到类似的退相干抑制。
A low-temperature model system consisting of a central spin coupled to a spin-bath is studied to determine whether interaction among bath spins has an effect on central spin dynamics. In the absence of intra-environmental coupling, decoherence of the central spin is fast and irreversible. Strong intra-environmental interaction results in an effective decoupling of the central spin from the bath and suppression of decoherence. Weaker intra-environmental coupling reduces but does not eliminate decoherence. We argue that similar suppression of decoherence should be observed for electronic states of He impurities in silicon or diamond.