Thermal Ionization for Short-Range Potentials
arXiv:2006.10874 · doi:10.1007/s10955-020-02688-9
Abstract
We study a concrete model of a confined particle in form of a Schrödinger operator with a compactly supported smooth potential coupled to a bosonic field at positive temperature. We show, that the model exhibits thermal ionization for any positive temperature, provided the coupling is sufficiently small. Mathematically, one has to rule out that zero is an eigenvalue of the self-adjoint generator of time evolution - the Liouvillian. This will be done by using positive commutator methods with dilations in the space of scattering functions. Our proof relies on a spatial cutoff in the coupling but does otherwise not require any unnatural restrictions.
arXiv comment66 pages; proof of the virial theorem revised, further corrections and more details in several proofs
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