Intensity fluctuations in a driven Dicke model

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

Physica A: Statistical Mechanics and its Applications, 1980, vol. 103, issue 1, 213-225

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.

Date: 1980
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:103:y:1980:i:1:p:213-225

DOI: 10.1016/0378-4371(80)90215-0

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