Absence of collapse in quantum Rabi oscillations

Abstract

We show analytically that the collapse and revival in the population dynamics of the atom-cavity coupled system under the rotating wave approximation (RWA), valid only at very weak coupling, is an artifact as the atom-cavity coupling is increased. Even the first-order correction to the RWA is able to bring about the absence of the collapse in the dynamics of atomic population inversion thanks to intrinsic oscillations resulting from the transitions between two levels with the same atomic quantum number. The removal of the collapse is valid for a wide range of coupling strengths which are accessible to current experimental setups. In addition, based on our analytical results that greatly improve upon the conventional RWA, even the strong-coupling power spectrum can now be explained with the help of the numerically exact energy levels.

21 pages, 3 figures

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Cited by in corpus (5)

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• Simulating Anisotropic quantum Rabi model via frequency modulation
• Effects of counter-rotating-wave terms on the non-Markovianity in quantum open systems
• Multi-qubit Quantum Rabi Model and Multi-partite Entangled States in a Circuit QED System