AbslhctWe present the radius integrated Wiper function for a general pure state and discuss the coefficients of the different Fourier components. A fast converging expansion of these ccefficients is given and its usefulness is shown for coherent light Remarkable and measurable differences to the Pea-Bamett formalism appear for weakly excited coherent states while for large excitations both dispersions agw in their leading terms. deviations are expected for specially designed two-photon coherent states.

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