Franck-Condon effect and squeezed-state physics as double-source interference phenomena
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- Wheeler, J.A. Lett Math Phys (1985) 10: 201. doi:10.1007/BF00398159
Double-source interference concepts are useful in describing-within the framework of quantum theory-the response of a vibrating system, such as a diatomic molecule or an electric circuit, to a sudden change in the parameters of the vibration. The initial vibration state, depicted as an occupied quasi-elliptic band in phase space, typically intersects the corresponding elliptic band for the final vibration state in two symmetrically located diamond-shaped zones. Interference between the two contributions modulates the ‘catenary curve’ pattern of transition probabilities in their dependence on the quantum number of the final state.