Marco Ornigotti, Andrea Aiello, Gerd Leuchs
A coherent state representation of the expectation value of an arbitrary (but still polynomial) normal ordered quantum operator is discussed. This serves as a basis for developing a fast and easy-to-handle algorithm, based on series of Hermite polynomials, for calculating such quantities. The case of single mode field with number, coherent and squeezed states is treated in detail. Some hints on how to extend the algorithm to multimode fields are also given.
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http://arxiv.org/abs/1205.3363
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