Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of the Physical Society of Japan

The “Actual” versus “Virtual” Experiments on Quantum Collapse and Revival

Young-Tak Chough

Published Feb 15, 1999• 5 citations
Publisher

Abstract

We modeled an atomic beam micromaser experiment [G. Rempe et al. : Phys. Rev. Lett. 58 (1987) 353] as well as a more recently reported cavity-QED experiment of a similar type [M. Brune et al. : Phys. Rev. Lett. 76 (1996) 1800] using the theory of quantum trajectories in order to see to what degree agreement between theory and experiment can be achieved. We compared our computations with the analysis based upon a “quantum theory of micromaser” [P. Filipowicz et al. : Phys. Rev. A 34 (1986) 3077] for the purpose of reliability check. We found rather nonnegligible differences between the results of theories and of experiments.

DOI
10.1143/jpsj.68.414

Related papers

Detection of Rydberg-atom micromasers

L. Z. Wang

The lifetimes of Rydberg atoms have been considered in micromaser theory. The difference from the usual micromaser theory [P. Filipowicz, J. Javanainen, and P. Meystre, Phys. Rev. A 34, 3077 (1986)] without level decay rates is discussed. It is shown that when the atom-field interaction time is large, the quantum collapse and revival are significantly different from the prediction of the usual micromaser theory. The relation between the photon fluctuation and the fluctuation of the population of the lower level after interacting with a maser field is also discussed. We found that the consistency of the sub-Poisson statistics of the lower-level population and photon number is violated.

Physical Review A•Jan 1, 1992•5 citations

Collapse and revival in the micromaser

Ewan M. Wright, P. Meystre

We compare the collapse and revival occurring in the steady-state characteristics of the micromaser with the corresponding effects in the Jaynes-Cummings model.

Optics Letters•Jan 15, 1989•29 citations

Quantum trajectory analysis of a thresholdlike transition in the microlaser

Changhuei Yang, Kyungwon An

In a recent microlaser experiment [K. An et al., Phys. Rev. Lett. 73, 3375 (1994)], a thresholdlike transition of intracavity mean photon number as a function of intracavity mean atom number has been observed. In this paper the behavior is explored with quantum trajectory simulations. It is shown that the transition is caused by enhanced atom-cavity Rabi interaction due to the increase of the intracavity photon number as the intracavity atom number is increased. The transition is further accentuated by the position-dependent variation of the coupling constant in the Fabry-P\'erot cavity. In addition, it is demonstrated that multiatom collective effects are negligible in the microlaser under consideration, in which atoms are injected into the cavity at random times and the product of the coupling constant and atom-cavity interaction time is much less than \ensuremath{\pi}. In this case the analytic theory of the one-atom micromaser [P. Filipowicz et al., Phys. Rev. A 34, 3077 (1986)] can be extrapolated into the multiatom region, assuming uniform atom-cavity coupling throughout the cavity and monovelocity atomic injection. Finally, simulations are performed which account for spatial variation of coupling constant, velocity distribution of injected atoms, and spontaneous atomic decay in the actual experiment. The results are in good agreement with experiment.

Physical Review A•Jun 1, 1997•14 citations

Atomic motion and density fluctuations in cavity QED with atomic beams

Levente Horvath, H. J. Carmichael

Ab initio quantum trajectory simulations of a cavity QED system comprising an atomic beam traversing a coherently driven standing-wave cavity are carried out. The intensity correlation function in transmission is computed and compared with the experimental measurements of Rempe et al. [Phys. Rev. Lett. 67, 1727 (1991)] and Foster et al. [Phys. Rev. A 61, 053821 (2000)]. It is shown that atomic beam density fluctuations induced by the motion of the atoms can account for the reported disagreement of the experimental results with theory (by an overall scale factor of 2 to 4). Moderate misalignments of the atomic beam produce large intracavity photon number fluctuations which significantly degrade the quantum correlations. One parameter fits to the experimental data are made in the weak-field limit with the adjustable parameter being the atomic beam tilt. Departures of the experimental conditions from the weak-field limit are discussed.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Dec 28, 2005•1 citation

Quantum trajectories and quantum control: theory and cavity-QED experiment

Howard M. Wiseman, Prahlad Warszawski, Joseph E. Reiner +3 more

•Jan 1, 2003•0 citations

Comparison between different models for quantum jump superoperators in cavity QED experiments

Salomon Sylvain Mizrahi, Alexandre V. Dodonov, V. V. Dodonov

Journal of Russian Laser Research•Sep 1, 2009•1 citation
We modeled an atomic beam micromaser experiment [G. Rempe et al. : Phys. Rev. Lett. 58 (1987) 353] as well as a more recently reported cavity-QED experiment of a similar type [M. Brune et al. : Phys. Rev. Lett. 76 (1996) 1800] using the theory of quantum trajectories in order to see to what degree agreement between theory and experiment can be achieved. We compared our computations with the analysis based upon a “quantum theory of micromaser” [P. Filipowicz et al. : Phys. Rev. A 34 (1986) 3077] for the purpose of reliability check. We found rather nonnegligible differences between the results of theories and of experiments.
The lifetimes of Rydberg atoms have been considered in micromaser theory. The difference from the usual micromaser theory [P. Filipowicz, J. Javanainen, and P. Meystre, Phys. Rev. A 34, 3077 (1986)] without level decay rates is discussed. It is shown that when the atom-field interaction time is large, the quantum collapse and revival are significantly different from the prediction of the usual micromaser theory. The relation between the photon fluctuation and the fluctuation of the population of the lower level after interacting with a maser field is also discussed. We found that the consistency of the sub-Poisson statistics of the lower-level population and photon number is violated.
In a recent microlaser experiment [K. An et al., Phys. Rev. Lett. 73, 3375 (1994)], a thresholdlike transition of intracavity mean photon number as a function of intracavity mean atom number has been observed. In this paper the behavior is explored with quantum trajectory simulations. It is shown that the transition is caused by enhanced atom-cavity Rabi interaction due to the increase of the intracavity photon number as the intracavity atom number is increased. The transition is further accentuated by the position-dependent variation of the coupling constant in the Fabry-P\'erot cavity. In addition, it is demonstrated that multiatom collective effects are negligible in the microlaser under consideration, in which atoms are injected into the cavity at random times and the product of the coupling constant and atom-cavity interaction time is much less than \ensuremath{\pi}. In this case the analytic theory of the one-atom micromaser [P. Filipowicz et al., Phys. Rev. A 34, 3077 (1986)] can be extrapolated into the multiatom region, assuming uniform atom-cavity coupling throughout the cavity and monovelocity atomic injection. Finally, simulations are performed which account for spatial variation of coupling constant, velocity distribution of injected atoms, and spontaneous atomic decay in the actual experiment. The results are in good agreement with experiment.
Ab initio quantum trajectory simulations of a cavity QED system comprising an atomic beam traversing a coherently driven standing-wave cavity are carried out. The intensity correlation function in transmission is computed and compared with the experimental measurements of Rempe et al. [Phys. Rev. Lett. 67, 1727 (1991)] and Foster et al. [Phys. Rev. A 61, 053821 (2000)]. It is shown that atomic beam density fluctuations induced by the motion of the atoms can account for the reported disagreement of the experimental results with theory (by an overall scale factor of 2 to 4). Moderate misalignments of the atomic beam produce large intracavity photon number fluctuations which significantly degrade the quantum correlations. One parameter fits to the experimental data are made in the weak-field limit with the adjustable parameter being the atomic beam tilt. Departures of the experimental conditions from the weak-field limit are discussed.