Abstract
We study the time evolution of a three dimensional quantum particle under the action of a time-dependent point interaction fixed at the origin. We assume that the “strength” of the interaction α(t) is a periodic function with an arbitrary mean. Under very weak conditions on the Fourier coefficients of α(t), we prove that there is complete ionization as t→∞, starting from a bound state at time t=0. Moreover we prove also that, under the same conditions, all the states of the system are scattering states.
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Communicated by B. Simon
On leave from Dipartimento di Matematica, Università di Roma, “La Sapienza”, Italy.
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Correggi, M., Dell’Antonio, G., Figari, R. et al. Ionization for Three Dimensional Time-Dependent Point Interactions. Commun. Math. Phys. 257, 169–192 (2005). https://doi.org/10.1007/s00220-005-1293-x
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DOI: https://doi.org/10.1007/s00220-005-1293-x