Engineering spin waves in a high-spin ultracold Fermi gas.
Engineering spin waves in a high-spin ultracold Fermi gas.
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DOI：
10.1103/physrevlett.110.250402
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发表时间：
2013-02
影响因子：
8.6
通讯作者：
J. Heinze;J. Krauser;N. Fläschner;K. Sengstock;C. Becker;U. Ebling;A. Eckardt;M. Lewenstein
中科院分区：
文献类型：
--
作者：
J. Heinze;J. Krauser;N. Fläschner;K. Sengstock;C. Becker;U. Ebling;A. Eckardt;M. Lewenstein
我们报告的详细研究多组分自旋波在一个s=3/2费米气体的高自旋导致新的张量自由度相比，s=1/2系统。从线性到非线性区域研究了自旋-自旋态的激发，其中张量特征特别明显。通过调整初始状态，我们设计了张量自旋波的特征，使得逆流自旋流的大小和符号得到有效控制。我们的数据与数值和分析结果的比较显示出良好的一致性。
We report on the detailed study of multicomponent spin waves in an s=3/2 Fermi gas where the high spin leads to novel tensorial degrees of freedom compared to s=1/2 systems. The excitations of a spin-nematic state are investigated from the linear to the nonlinear regime, where the tensorial character is particularly pronounced. By tuning the initial state we engineer the tensorial spin-wave character, such that the magnitude and the sign of the counterflow spin currents are effectively controlled. A comparison of our data with numerical and analytical results shows good agreement.