论文标题
二维量子自旋晶格中的几何形状诱导的整流
Rectification induced by geometry in two-dimensional quantum spin lattices
论文作者
论文摘要
我们解决了几何不对称在二维量子旋转链中发生自旋整流的作用，在边界处受两个储层，以量子主方程为模型。我们讨论了某些一维情况的整流差异，并为XXZ模型的各向异性参数的不同值提供了整流系数R的数值结果，以及边界驱动器的不同配置，包括局部和非局部耗散器。我们的结果还表明，几何不对称性以及不均匀的磁场，即使在XX模型中也可以诱导旋转电流的整流，这表明在量子自旋系统中，由于几何形状而导致的整流现象可能是普遍发生的。
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.
