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arXiv 1102.2024cond-mat.quant-gasphysics.atom-phquant-ph
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通过原子-分子暗态的费米配对的慢光探测

Slow-light probe of Fermi pairing through an atom-molecule dark state

Hui Jing, Y. Deng, P. Meystre

摘要:

研究了量子简并原子气体通过分子暗态到基态双原子分子的双色光缔合。这个过程可以用λ能级的形式来描述,它在形式上类似于原子系统中的电磁感应透明(EIT),因此可以导致缓慢的光传播。我们表明,光场的群速度取决于明确的原子是玻色子或费米子,以及在费米子的情况下对间隙的存在或不存在,使测量的群速度实现了非破坏性诊断的原子状态和配对间隙。

英文摘要:

We consider the two-color photooassociation of a quantum degenerate atomic gas into ground-state diatomic molecules via a molecular dark state. This process can be described in terms of a lambda level scheme that is formally analogous to the situation in electromagnetically-induced transparency (EIT) in atomic systems, and therefore can result in slow light propagation. We show that the group velocity of the light field depends explicitly on whether the atoms are bosons or fermions, as well as on the existence or absence of a pairing gap in the case of fermions, so that the measurement of the group velocity realizes a non-destructive diagnosis of the atomic state and the pairing gap.

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