Investigation of thermalization in giant-spin models by different Lindblad schemes
Investigation of thermalization in giant-spin models by different Lindblad schemes
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DOI：
10.1016/j.jmmm.2017.04.021
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发表时间：
2016-11
影响因子：
2.7
通讯作者：
C. Beckmann;J. Schnack
中科院分区：
文献类型：
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作者：
C. Beckmann;J. Schnack
磁量子系统中时间依赖性的理论理解是非常重要的，特别是在酉时间演化伴随着弛豫过程的情况下。一个关键的例子是单分子磁体的动力学，其中量子隧穿的磁化竞争与热弛豫的各向异性障碍。在这篇文章中，我们调查如何良好的Lindblad方法描述的巨自旋模型的松弛和结果如何取决于所采用的运营商，传输的行动的热浴。
The theoretical understanding of time-dependence in magnetic quantum systems is of great importance in particular for cases where a unitary time evolution is accompanied by relaxation processes. A key example is given by the dynamics of single-molecule magnets where quantum tunneling of the magnetization competes with thermal relaxation over the anisotropy barrier. In this article we investigate how good a Lindblad approach describes the relaxation in giant spin models and how the result depends on the employed operator that transmits the action of the thermal bath.