A new view on the Peřina-Mišta form of the Glauber-Sudershan P function

Abstract

The ‘regularized’ form of the Glauber-Sudershan P function in terms of a series of Laguerre polynomials proposed by Perina and Mista is reconsidered. It is shown that the corresponding expansion coefficients result from averaging sampling functions well known from optical homodyne tomography with respect to the quadrature distribution of the signal field. An illustrative example of a nonclassical state is considered.