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arXiv quant-ph/0312229quant-ph
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混沌原子-光学台球中相干性的恢复

Revivals of Coherence in Chaotic Atom-Optics Billiards

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

摘要:

我们研究了囚禁在光偶极阱中的热原子的相干性,其中经典动力学是混沌的。一个微扰表达式推导的回声计划的相干性[Andersen et.例如,物理修订信函90,023001(2003)]表明它是阱中原子运动的本征态的生存概率或保真度的函数。回声相干性和生存概率显示“系统特定”的功能,即使在底层的经典动力学是混沌的。特别是,部分复苏的回波信号和生存概率被发现为一个小的位移的潜力。其次,给出了平均回波信号的“半经典”表达式,并用于计算光片楔形台球中原子的回波信号。在该系统中发现了回波相干性的恢复,表明它们可能是偶极陷阱的一个普遍特征。

英文摘要:

We investigate the coherence properties of thermal atoms confined in optical dipole traps where the underlying classical dynamics is chaotic. A perturbative expression derived for the coherence of the echo scheme of [Andersen et. al., Phys. Rev. Lett. 90, 023001 (2003)] shows it is a function of the survival probability or fidelity of eigenstates of the motion of the atoms in the trap. The echo coherence and the survival probability display "system specific" features, even when the underlying classical dynamics is chaotic. In particular, partial revivals in the echo signal and the survival probability are found for a small shift of the potential. Next, a "semi-classical" expression for the averaged echo signal is presented and used to calculate the echo signal for atoms in a light sheet wedge billiard. Revivals in the echo coherence are found in this system, indicating they may be a generic feature of dipole traps.

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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