2 papers
math-ph2025
Fiber decomposition of non-commutative harmonic oscillators by two-photon quantum Rabi models
Fumio Hiroshima, Tomoyuki Shirai
The non-commutative harmonic oscillators (NcHO) and 2p-quantum Rabi models (2pQRM) are extensions of harmonic oscillators. The purpose of this paper is to give a relationship betwe…
math-ph2024
Spectral zeta function and ground state of quantum Rabi model
Fumio Hiroshima, Tomoyuki Shirai
The spectral zeta function of the quantum Rabi Hamiltonian is considered. It is shown that the spectral zeta function converges to the Riemann zeta function as the coupling constan…