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arXiv 1306.2606cond-mat.quant-gasphysics.atm-clus
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超冷原子的磁致自旋轨道耦合

Magnetically generated spin-orbit coupling for ultracold atoms

Brandon M. Anderson, I. B. Spielman, Gediminas Juzeliūnas

摘要:

本文提出了一种新的技术,在不涉及光的情况下,产生超冷原子的二维和三维Rashba型自旋轨道耦合。该方法依赖于一系列脉冲非均匀磁场,在原子上压印适当的相位梯度。对于足够短的脉冲持续时间,时间平均哈密顿量很好地近似Rashba哈密顿量。对于自旋-1/2,可以精确计算能谱的高阶修正,而对于较高自旋,则可以微扰计算。脉冲序列不改变旋转对称原子-原子相互作用的形式。最后,我们提出了一个简单的实现这种脉冲序列的原子芯片上。

英文摘要:

We present a new technique for producing two- and three-dimensional Rashba-type spin-orbit couplings for ultracold atoms without involving light. The method relies on a sequence of pulsed inhomogeneous magnetic fields imprinting suitable phase gradients on the atoms. For sufficiently short pulse durations, the time-averaged Hamiltonian well approximates the Rashba Hamiltonian. Higher order corrections to the energy spectrum are calculated exactly for spin-1/2 and perturbatively for higher spins. The pulse sequence does not modify the form of rotationally symmetric atom-atom interactions. Finally, we present a straightforward implementation of this pulse sequence on an atom chip.

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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