Dynamical correlation functions and the quantum Rabi model
arXiv:1211.6469 · doi:10.1103/PhysRevA.87.023835
Abstract
We study the quantum Rabi model within the framework of the analytical solution developed in Phys. Rev. Lett. 107,100401 (2011). In particular, through time-dependent correlation functions, we give a quantitative criterion for classifying two regions of the quantum Rabi model, involving the Jaynes-Cummings, the ultrastrong, and deep strong coupling regimes. In addition, we find a stationary qubit-field entangled basis that governs the whole dynamics as the coupling strength overcomes the mode frequency.
8 pages, 8 figures. Revised version, accepted for publication in Physical Review A
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