Absence of collapse in quantum Rabi oscillations

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 t...

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Main Authors: He, Shu, Zhao, Yang, Chen, Qing-Hu
Other Authors: School of Materials Science & Engineering
Format: Journal Article
Language:English
Published: 2014
Subjects:
Online Access:https://hdl.handle.net/10356/103374
http://hdl.handle.net/10220/24471
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author He, Shu
Zhao, Yang
Chen, Qing-Hu
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
He, Shu
Zhao, Yang
Chen, Qing-Hu
author_sort He, Shu
collection NTU
description 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.
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spelling ntu-10356/1033742023-07-14T15:55:37Z Absence of collapse in quantum Rabi oscillations He, Shu Zhao, Yang Chen, Qing-Hu School of Materials Science & Engineering DRNTU::Science::Physics::Atomic physics 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. Published version 2014-12-17T01:07:03Z 2019-12-06T21:11:13Z 2014-12-17T01:07:03Z 2019-12-06T21:11:13Z 2014 2014 Journal Article He, S., Zhao, Y., & Chen, Q.-H. (2014). Absence of collapse in quantum Rabi oscillations. Physical review A, 90(5). https://hdl.handle.net/10356/103374 http://hdl.handle.net/10220/24471 10.1103/PhysRevA.90.053848 en Physical review A © 2014 American Physical Society. This paper was published in Physical Review A and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI: [http://dx.doi.org/10.1103/PhysRevA.90.053848]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 10 p. application/pdf
spellingShingle DRNTU::Science::Physics::Atomic physics
He, Shu
Zhao, Yang
Chen, Qing-Hu
Absence of collapse in quantum Rabi oscillations
title Absence of collapse in quantum Rabi oscillations
title_full Absence of collapse in quantum Rabi oscillations
title_fullStr Absence of collapse in quantum Rabi oscillations
title_full_unstemmed Absence of collapse in quantum Rabi oscillations
title_short Absence of collapse in quantum Rabi oscillations
title_sort absence of collapse in quantum rabi oscillations
topic DRNTU::Science::Physics::Atomic physics
url https://hdl.handle.net/10356/103374
http://hdl.handle.net/10220/24471
work_keys_str_mv AT heshu absenceofcollapseinquantumrabioscillations
AT zhaoyang absenceofcollapseinquantumrabioscillations
AT chenqinghu absenceofcollapseinquantumrabioscillations