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arXiv 1602.01723cond-mat.quant-gas
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费米量子气体的腔诱导手征态

Cavity-induced chiral states of fermionic quantum gases

Ameneh Sheikhan, Ferdinand Brennecke, Corinna Kollath

摘要:

我们研究了置于光学腔中的超冷费米子,并将其置于光晶格中。横向行波激光束与动态腔场一起诱导了一个双光子拉曼辅助隧穿过程,该过程沿阶梯的梯级具有空间相关的相位印记。我们确定了腔场和原子之间的反馈机制可能发生的稳态。我们发现一个有限的腔场振幅的自发出现,导致一个人工磁场的费米子原子感到。这些形成携带手性电流的手性绝缘或手性液态。我们探讨了丰富的状态图作为一个函数的横向激光束的功率,原子填充,和腔诱导隧穿过程中的相位印记。自组织手征态的横向激光功率的突然发作或缓慢的指数激活都可能发生。

英文摘要:

We investigate ultra-cold fermions placed into an optical cavity and subjected to optical lattices which confine the atoms to ladder structures. A transverse running-wave laser beam induces together with the dynamical cavity field a two-photon Raman-assisted tunneling process with spatially dependent phase imprint along the rungs of the ladders. We identify the steady states which can occur by the feedback mechanism between the cavity field and the atoms. We find the spontaneous emergence of a finite cavity field amplitude which leads to an artificial magnetic field felt by the fermionic atoms. These form a chiral insulating or chiral liquid state carrying a chiral current. We explore the rich state diagram as a function of the power of the transverse laser beam, the atomic filling, and the phase imprint during the cavity-induced tunneling. Both a sudden onset or a slow exponential activation with the transverse laser power of the self-organized chiral states can occur.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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