Quantum Rabi model for N-state atoms.
A tractable N-state Rabi Hamiltonian is introduced by extending the parity symmetry of the two-state model. The single-mode case provides a few-parameter description of a novel class of periodic systems, predicting that the ground state of certain four-state atom-cavity systems will undergo parity change at strong-coupling. A group-theoretical treatment provides physical insight into dynamics and a modified rotating wave approximation obtains accurate analytical energies. The dissipative case can be applied to study excitation energy transfer in molecular rings or chains.
Department of Physics, Yale University, P.O. Box 208120, New Haven, Connecticut 06520-8120, USA. victor.albert@yale.edu
Victor V
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Albert