We study the following situation: A two-level atom interacts according to the Jaynes–Cummings model with a quantized cavity field prepared in a coherent state by a classical source. The atom is selectively ionized after exiting the cavity, and it is found that the field states are highly dependent, for a given interaction time, on the outcome of the measurement and are dramatically different from those in the case of no selective measurement. First we show how to obtain a bifurcated Poisson distribution for which the probability of finding the photon number at the center of the initial Poisson distribution vanishes. Then we study the generation of sub-Poissonian states and show that the cavity field can approach a number state with a sequence of properly prepared and measured atoms.
© 1997 Optical Society of AmericaFull Article | PDF Article
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