Quantum Rabi Model forN-State Atoms

Victor V. Albert
2012 Physical Review Letters  
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
more » ... dissipative case can be applied to study excitation energy transfer in molecular rings or chains.
doi:10.1103/physrevlett.108.180401 pmid:22681049 fatcat:c25xdaf7bbbthoqu5fwf2fb4oi