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arXiv 1012.1422physics.atom-ph
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费什巴赫共振附近有限能量的通用三体物理

Universal three-body physics at finite energy near Feshbach resonances

Yujun Wang, B. D. Esry

摘要:

我们发现,普遍的三体物理学延伸到阈值制度以外的非零能量。对于在费什巴赫共振附近具有负的两体$s$波散射长度的超冷原子气体,我们表明Efimov物理的共振峰特征在更高的碰撞能量下的三体复合中持续存在。对于这个和其他非弹性过程中,我们使用绝热超球面表示推导出普遍的解析表达式,其依赖于散射长度,碰撞能量,和-窄共振-的有效范围。这些表达式得到了薛定谔方程的完全数值解的支持,并显示了对数周期依赖于Efimov物理的能量特性。这种依赖性是强大的,可以用来实验观察几个Efimov功能。

英文摘要:

We find that universal three-body physics extends beyond the threshold regime to non-zero energies. For ultracold atomic gases with a negative two-body $s$-wave scattering length near a Feshbach resonance, we show the resonant peaks characteristic of Efimov physics persist in three-body recombination to higher collision energies. For this and other inelastic processes, we use the adiabatic hyperspherical representation to derive universal analytical expressions for their dependence on the scattering length, the collision energy, and --- for narrow resonances --- the effective range. These expressions are supported by full numerical solutions of the Schrödinger equation and display log-periodic dependence on energy characteristic of Efimov physics. This dependence is robust and might be used to experimentally observe several Efimov features.

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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