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Collective atomic recoil lasing with a partially coherent pump

Robb, G.R.M. and Firth, W.J. (2007) Collective atomic recoil lasing with a partially coherent pump. Physical Review Letters, 99 (25). pp. 253601-253604. ISSN 0031-9007

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Abstract

We investigate the effect of pump phase noise on the collective backscattering of light by a cold, collisionless atomic gas. We show that for a partially coherent pump field, the growth rate of the backscattered field is reduced relative to that for a coherent pump, but the backscattered intensity can be increased. Our results demonstrate that fluctuations and noise can play a counterintuitive role in nonlocally coupled many-body systems.