2014/11/26 by Shu He, Yang Zhao, Qing-Hu Chen +1
Computer Science · Physics and Astronomy · #Atom (system on chip) #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Coupling (piping) #Physics #Population #Population inversion #Quantum #Quantum Information and Cryptography #Quantum electrodynamics #Quantum mechanics #Quantum optics and atomic interactions #Rabi cycle #Rotating wave approximation #Statistical physics #quant-ph
paper · pdf · doi:10.1103/physreva.90.053848
published as Phys. Rev. A 90, 053848 (2014) · 21 pages, 3 figures
openalex publication_date 2014/11/26 · arxiv created 2014/11/27 · arxiv updated 2014/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.