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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 9 — Apr. 26, 2010
  • pp: 9286–9302

Continuous control of the coupling constant in an atom-cavity system by using elliptic polarization and magnetic sublevels

Sungsam Kang, Youngwoon Choi, Sooin Lim, Wookrae Kim, Jung-Ryul Kim, Jai-Hyung Lee, and Kyungwon An  »View Author Affiliations

Optics Express, Vol. 18, Issue 9, pp. 9286-9302 (2010)

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Atom-cavity coupling constant is a key parameter in cavity quantum electrodynamics for describing the interaction between an atom and a quantized electromagnetic field in a cavity. This paper reports a novel way to tune the coupling constant continuously by inducing an averaging of the atomic dipole moment over degenerate magnetic sublevels with elliptic polarization of the cavity field. We present an analytic solution of the stationary-state density matrix for this system with consideration of FF + 1 hyperfine transition under a weak excitation condition. We rigorously show that the stationary-state emission spectra of this system can be approximated by that of a non-degenerate two-level atom with an effective coupling constant as a function of the elliptic angle of the cavity field only. A precise condition for this approximation is derived and its physical meaning is interpreted in terms of a population-averaged transition strength and its variance. Our results can be used to control the coupling constant in cavity quantum electrodynamics experiments with a degenerate two-level atom with magnetic sublevels. Possible applications of our results are discussed.

© 2010 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(270.5580) Quantum optics : Quantum electrodynamics
(300.6210) Spectroscopy : Spectroscopy, atomic

ToC Category:
Atomic and Molecular Physics

Original Manuscript: January 19, 2010
Revised Manuscript: February 15, 2010
Manuscript Accepted: April 16, 2010
Published: April 19, 2010

Sungsam Kang, Youngwoon Choi, Sooin Lim, Wookrae Kim, Jung-Ryul Kim, Jai-Hyung Lee, and Kyungwon An, "Continuous control of the coupling constant in an atom-cavity system by using elliptic polarization and magnetic sublevels," Opt. Express 18, 9286-9302 (2010)

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