Cooperative Atomic Behaviour and Oscillator Formation in a Squeezed Vacuum
Mohamed Ridza Wahiddin, Saad S. M. Hassan, R. Bullough · Journal of Modern Optics · 1995
Time-dependent (numerical) results are presented for super-radiant behaviour in the Dicke model of N a = 2, 3 atoms in a broad band squeezed vacuum. This concerns the fluctuations and the intensity of the fluorescent radiation as well as the atomic population inversion of the system with atoms initially in an atomic coherent state. In the steady state, and in the N a → ∞, we show that the ‘atomic’ Dicke model behaves like a ‘giant quantum oscillator’, in which the number of excited atoms asymptotically approaches the average number of photons in the resonant mode of the squeezed vacuum, just as in the thermally driven case.