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arXiv quant-ph/0301054quant-ph
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无耗散退相干

Decoherence without dissipation

G. W. Ford, R. F. O'Connell

摘要:

典型的薛定谔猫态,即,初始状态对应于两个相距甚远的高斯波包。退相干时间仅在基本量子力学和平衡态统计力学的框架内计算。这与通常的说法不同,即与耗散环境的不可逆耦合是退相干的机制。在这里,我们表明,相反,退相干实际上可以发生在高温下,甚至为消失的小耗散。

英文摘要:

The prototypical Schrödinger cat state, i.e., an initial state corresponding to two widely separated Gaussian wave packets, is considered. The decoherence time is calculated solely within the framework of elementary quantum mechanics and equilibrium statistical mechanics. This is at variance with common lore that irreversible coupling to a dissipative environment is the mechanism of decoherence. Here, we show that, on the contrary, decoherence can in fact occur at high temperature even for vanishingly small dissipation.

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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