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Dynamical correlation functions and the quantum Rabi model

Mon, 2013-02-11 19:19 - Daniel Rudolph
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Date: 
2013-02-08
Author(s): 

F. A. Wolf, F. Vallone, G. Romero, M. Kollar, E. Solano, and D. Braak

Reference: 

arXiv:1211.6469 [quant-ph], accepted in Physical Review A (2013)

URL: 

http://arxiv.org/abs/1211.6469

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.