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Intensity fluctuations in a driven Dicke model

Author

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  • Hassan, S.S.
  • Bullough, R.K.
  • Puri, R.R.
  • Lawande, S.V.

Abstract

Exact analytic results for the steady-state atomic correlation functions of arbitrary order n are given for a system of N superimposed two-level atoms (the Dicke model) collectively interacting with an imposed C.W. laser field. Photon statistical studies through the normalised intensity-intensity correlation function, g(2)(0), show that when both N and the driving field become large, g(2)(0) → 1.2. This compares with an earlier approximated calculation1) which allows an independent atomic decay mechanism giving rise to g(2)(0) ≈ 2. Cooperative interactions thus reduce intensity fluctuations. Photon anti-bunching occurs for finite N. There is a second-order phase transition critical bifurcation point in a thermodynamic limit in which N → ∞; a critical exponent is determined.

Suggested Citation

  • Hassan, S.S. & Bullough, R.K. & Puri, R.R. & Lawande, S.V., 1980. "Intensity fluctuations in a driven Dicke model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 103(1), pages 213-225.
    • Handle: RePEc:eee:phsmap:v:103:y:1980:i:1:p:213-225
    DOI: 10.1016/0378-4371(80)90215-0
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    Cited by:

    1. Ficek, Z. & Tanaś, R. & Kielich, S., 1987. "Quantum beats and superradiant effects in the spontaneous emission from two nonidentical atoms," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 146(3), pages 452-482.

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