首页> 外文期刊>Journal of Physics, B. Atomic, Molecular and Optical Physics: An Institute of Physics Journal >Distinguishing mesoscopic quantum superpositions from statistical mixtures in periodically shaken double wells
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Distinguishing mesoscopic quantum superpositions from statistical mixtures in periodically shaken double wells

机译:区分周期性摇动双井中统计混合物的介观量子叠加

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摘要

For BoseEinstein condensates in double wells, N-particle Rabi-like oscillations often seem to be damped. Far from being a decoherence effect, the apparent damping can indicate the emergence of quantum superpositions in the many-particle quantum dynamics. However, in an experiment it would be difficult to distinguish the apparent damping from decoherence effects. This paper suggests using controlled periodic shaking to quasi-instantaneously switch the sign of an effective Hamiltonian, thus implementing an echo technique which distinguishes quantum superpositions from statistical mixtures. The scheme for the effective time reversal is tested by numerically solving the time-dependent N-particle Schr?dinger equation.
机译:对于双井中的BoseEinstein冷凝物,似乎似乎抑制了N粒子类似Rabi的振荡。表观阻尼远非消相干效应,它可以表明多粒子量子动力学中量子叠加的出现。但是,在实验中,很难将表观阻尼与退相干效应区分开。本文建议使用可控的周期性振动来准瞬时切换有效哈密顿量的符号,从而实现一种将量子叠加与统计混合区分开的回波技术。通过数值求解与时间有关的N粒子Schr?dinger方程来测试有效时间反转的方案。

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