Spin segregation via dynamically induced long-range interactions in a system of ultracold fermions
Spin segregation via dynamically induced long-range interactions in a system of ultracold fermions
复制标题
通过超冷费米子系统中动态诱导的长程相互作用实现自旋分离
DOI：
10.1103/physreva.84.063607
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发表时间：
2011
影响因子：
2.9
通讯作者：
M. Lewenstein
中科院分区：
文献类型：
--
作者：
U. Ebling;A. Eckardt;M. Lewenstein
我们从理论上研究了在谐振阱中自旋为1/2的一维费米子系统的时间演化。我们预测，在现实的实验条件下，弱相互作用的自旋偏析建立在时间上。这种效应依赖于交换相互作用和谐波陷阱之间的相互作用，它被发现在很宽的参数范围内。它可以被理解为一个有效的，动态诱导的长程相互作用的结果，这是通过整合出的陷阱中的快速振荡动力学。
We investigate theoretically the time evolution of a one-dimensional system of spin-1/2 fermions in a harmonic trap after, initially, a spiral spin configuration far from equilibrium is created. We predict a spin segregation building up in time already for weak interaction under realistic experimental conditions. The effect relies on the interplay between exchange interaction and the harmonic trap, and it is found for a wide range of parameters. It can be understood as a consequence of an effective, dynamically induced long-range interaction that is derived by integrating out the rapid oscillatory dynamics in the trap.