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arXiv 0905.0703quant-ph
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共振量子受激转子中无经典性的退相干

Decoherence without classicality in the resonant quantum kicked rotor

A. Romanelli

摘要:

我们研究了在Kraus算符定义的幺正噪声作用下的量子被踢转子的共振,我们证明了这种退相干一般不会导致经典的扩散行为.我们发现精确的解析表达式的密度矩阵和方差的主要共振。方差并没有失去其弹道行为,但相干性衰减的幂律。二次共振进行了数值处理,获得幂律衰减的方差和指数律衰减的相干性。

英文摘要:

We study the quantum kicked rotor in resonance subjected to an unitary noise defined through Kraus operators, we show that this type of decoherence does not, in general, lead to the classical diffusive behavior. We find exact analytical expressions for the density matrix and the variance in the primary resonances. The variance does not loose its ballistic behavior, however the coherence decays as a power law. The secondary resonances are treated numerically, obtaining a power-law decay for the variance and an exponential law decay for the coherence.

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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