Deep Strong Coupling Regime of the Jaynes-Cummings model

Abstract

We study the quantum dynamics of a two-level system interacting with a quantized harmonic oscillator in the deep strong coupling regime (DSC) of the Jaynes-Cummings model, that is, when the coupling strength g is comparable or larger than the oscillator frequency w (g/w > 1). In this case, the rotating-wave approximation cannot be applied or treated perturbatively in general. We propose an intuitive and predictive physical frame to describe the DSC regime where photon number wavepackets bounce back and forth along parity chains of the Hilbert space, while producing collapse and revivals of the initial population. We exemplify our physical frame with numerical and analytical considerations in the qubit population, photon statistics, and Wigner phase space.

Published version, note change of title: DSC regime of the JC model

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Cited by in corpus (2)

• Qubit-oscillator system under ultrastrong coupling and extreme driving
• Cavity Quantum Electrodynamics in the Ultrastrong Coupling Regime