论文标题
一维量子线中的自旋传输
Spin transport in a one-dimensional quantum wire
论文作者
论文摘要
我们通过连接到非相互作用导线的有限大小的一维相互作用线分析自旋传输。通过将重归于组的参数与其他分析考虑因素（例如记忆函数技术和激体隧穿）相结合，我们在相互作用和电线长度方面发现了自旋电导在不同参数方面的温度依赖性。发现温度依赖性是非单调的。特别是，与静态自旋电导率相比，该系统在零温度下接近零温度的完美自旋电导。我们讨论了我们的结果与超电原子的最新实验的联系，并将理论预测与温度最大能量量表的参数状态中的实验数据进行了比较。
We analyze the spin transport through a finite-size one-dimensional interacting wire connected to noninteracting leads. By combining renormalization-group arguments with other analytic considerations such as the memory function technique and instanton tunneling, we find the temperature dependence of the spin conductance in different parameter regimes in terms of interactions and the wire length. The temperature dependence is found to be nonmonotonic. In particular, the system approaches perfect spin conductance at zero temperature for both attractive and repulsive interactions, in contrast with the static spin conductivity. We discuss the connection of our results to recent experiments with ultracold atoms and compare the theoretical prediction to experimental data in the parameter regime where temperature is the largest energy scale.
