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arXiv 0909.2716quant-ph
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里德伯原子格子气中的费米集体激发

Fermionic collective excitations in a lattice gas of Rydberg atoms

B. Olmos, R. González-Férez, I. Lesanovsky

摘要:

研究了激光驱动下大间距环晶格中里德伯原子气体的多体量子态。如果激光驱动比里德伯态之间的范德华相互作用强得多,那么这些多体态就是集体费米激发。第一激发态是在整个晶格上延伸的自旋波。我们证明,我们的系统允许研究费米子在存在的障碍,虽然没有外部原子运动发生。我们分析了这种无序如何影响费米子态的激发特性。我们的工作显示了一条通往创建复杂的多粒子状态与原子在晶格中的路线。

英文摘要:

We investigate the many-body quantum states of a laser-driven gas of Rydberg atoms confined to a large spacing ring lattice. If the laser driving is much stronger than the van-der-Waals interaction among the Rydberg sates, these many-body states are collective fermionic excitations. The first excited state is a spin-wave that extends over the entire lattice. We demonstrate that our system permits to study fermions in the presence of disorder although no external atomic motion takes place. We analyze how this disorder influences the excitation properties of the fermionic states. Our work shows a route towards the creation of complex many-particle states with atoms in lattices.

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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