Spectral properties of the singular Friedrichs–Lee Hamiltonian
Paolo Facchi A, Marilena Ligabò, Davide Lonigro
We show that the Friedrichs–Lee model, which describes the one-excitation sector of a two-level atom interacting with a structured boson field, can be generalized to singular atom–field couplings. We provide a characterization of its spectrum and resonances and discuss the inverse spectral problem.
arXiv:1910.05957•Journal of Mathematical Physics•Mar 1, 2021•20 citations