二维量子自旋晶格中几何诱导的整流
Rectification induced by geometry in two-dimensional quantum spin lattices
摘要：
我们解决的作用的几何不对称性发生自旋整流在二维量子自旋链受到两个水库的边界，量子主方程建模。我们讨论了一些一维情况下的整流的差异，并提出了数值计算结果的整流系数R的XXZ模型的各向异性参数的不同值，和不同的配置的边界驱动器，包括本地和非本地dissipators。我们的结果还表明，几何不对称性，以及不均匀的磁场，可以诱导自旋电流整流，即使在XX模型，表明整流现象，由于几何可能是普遍发生在量子自旋系统。
英文摘要：
We address the role of geometrical asymmetry in the occurrence of spin rectification in two-dimensional quantum spin chains subject to two reservoirs at the boundaries, modeled by quantum master equations. We discuss the differences in the rectification for some one-dimensional cases, and present numerical results of the rectification coefficient R for different values of the anisotropy parameter of the XXZ model, and different configurations of boundary drives, including both local and non-local dissipators. Our results also show that geometrical asymmetry, along with inhomogeneous magnetic fields, can induce spin current rectification even in the XX model, indicating that the phenomenon of rectification due to geometry may be of general occurrence in quantum spin systems.
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