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Pump-dump iterative squeezing of vibrational wave packets

机译:振动波包的泵转储迭代压缩

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The free motion of a nonstationary vibrational wave packet in an electronic potential is a source of interesting quantum properties. In this work we propose an iterative scheme that allows continuous stretching and squeezing of a wave packet in the ground or in an excited electronic state, by switching the wave function between both potentials with pi pulses at certain times. Using a simple model of displaced harmonic oscillators and delta pulses, we derive the analytical solution and the conditions for its possible implementation and optimization in different molecules and electronic states. We show that the main constraining parameter is the pulse bandwidth. Although in principle the degree of squeezing (or stretching) is not bounded, the physical resources increase quadratically with the number of iterations, while the achieved squeezing only increases linearly. (c) 2005 American Institute of Physics.
机译:非平稳振动波包在电子势中的自由运动是令人感兴趣的量子特性的来源。在这项工作中,我们提出了一种迭代方案,该方案允许在特定时间通过pi脉冲在两个电位之间切换波函数,从而在地面或处于激发态的电子状态下对波包进行连续拉伸和压缩。使用位移谐波振荡器和增量脉冲的简单模型,我们得出了解析解及其在不同分子和电子状态下可能实现和优化的条件。我们表明主要的约束参数是脉冲带宽。尽管原则上不限制挤压(或拉伸)的程度,但是物理资源随迭代次数二次方增加,而所实现的挤压仅线性增加。 (c)2005年美国物理研究所。

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