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arXiv quant-ph/0404118quant-phnlin.CDphysics.atom-ph
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混沌和混合动力学原子光学台球中量子关联的衰减

Decay of Quantum Correlations in Atom Optics Billiards with Chaotic and Mixed Dynamics

M. F. Andersen, A. Kaplan, T. Grünzweig, N. Davidson

摘要:

我们在原子光学台球中对超冷原子进行了回波光谱学研究,以研究它们的量子动力学。捕获激光的失谐被用来改变“微扰”,这会导致回波相干性的衰减。观察到两种不同的制度:第一,微扰制度,其中的回声相干性的衰减是非单调的和部分复苏的相干性观察。这些复苏是更明显的陷阱与混合动力学相比,陷阱的动力学是完全混乱的。其次,对于较强的扰动,衰减变得单调,与扰动的强度无关。在这种情况下,混沌陷阱和混合动力陷阱之间没有明显的区别。

英文摘要:

We perform echo spectroscopy on ultra cold atoms in atom optics billiards, to study their quantum dynamics. The detuning of the trapping laser is used to change the ``perturbation'', which causes a decay in the echo coherence. Two different regimes are observed: First, a perturbative regime in which the decay of echo coherence is non-monotonic and partial revivals of coherence are observed. These revivals are more pronounced in traps with mixed dynamics as compared to traps where the dynamics is fully chaotic. Next, for stronger perturbations, the decay becomes monotonic and independent of the strength of the perturbation. In this regime no clear distinction can be made between chaotic traps and traps with mixed dynamics.

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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