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arXiv quant-ph/0603095quant-phcond-mat.softnlin.SI
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原子光学反冲转子中保真度的饱和

Saturation of fidelity in the atom-optics kicked rotor

Sandro Wimberger, Andreas Buchleitner

摘要:

适当考虑原子系综的实验初始条件,我们证明了对于一大类周期势的演化,量子保真度是冷原子实验可以达到的。我们证明了分析,在原子光学踢转子的基本量子共振,保真度饱和在一个恒定的,时间无关的值后,少量的踢。后者的饱和产生的大部分原子系综,而共振加速原子的保真度预计将根据幂律缓慢衰减。

英文摘要:

We show that the quantum fidelity is accessible to cold atom experiments for a large class of evolutions in periodical potentials, properly taking into account the experimental initial conditions of the atomic ensemble. We prove analytically that, at the fundamental quantum resonances of the atom-optics kicked rotor, the fidelity saturates at a constant, time-independent value after a small number of kicks. The latter saturation arises from the bulk of the atomic ensemble, whilst for the resonantly accelerated atoms the fidelity is predicted to decay slowly according to a power law.

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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