Coherent states for time dependent harmonic oscillator: the step function

Physics – Quantum Physics

Scientific paper

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Scientific paper

10.1016/S0375-9601(03)00461-4

We study the time evolution for the quantum harmonic oscillator subjected to a sudden change of frequency. It is based on an approximate analytic solution to the time dependent Ermakov equation for a step function. This approach allows for a continuous treatment that differs from former studies that involve the matching of two time independent solutions at the time when the step occurs.

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