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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1207.0641cond-mat.quant-gas
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具有周期调制相互作用的超冷晶格气体

Ultracold Lattice Gases with Periodically Modulated Interactions

Akos Rapp, Xiaolong Deng, Luis Santos

摘要:

我们表明,一个随时间变化的磁场诱导的周期性调制的散射长度可能会导致有趣的新的情况下,冷气体在光晶格,其特征在于非线性跳跃依赖于在相邻网站的数量差异。我们讨论了丰富的物理介绍了这种跳跃,包括对超流,完全无缺陷的莫特绝缘体状态有限的跳跃,和纯holon和doublon超流体。我们还解决实验检测,表明引入的非线性跳跃可能会导致谐波捕获气体的密度分布标记不同的超流区域之间的接口突然下降。

英文摘要:

We show that a time-dependent magnetic field inducing a periodically modulated scattering length may lead to interesting novel scenarios for cold gases in optical lattices, characterized by a nonlinear hopping depending on the number difference at neighboring sites. We discuss the rich physics introduced by this hopping, including pair superfluidity, exactly defect-free Mott-insulator states for finite hopping, and pure holon and doublon superfluids. We also address experimental detection, showing that the introduced nonlinear hopping may lead in harmonically trapped gases to abrupt drops in the density profile marking the interface between different superfluid regions.

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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