New Laguerre-polynomials’ generating functions derived by virtue of operator Hermite-polynomial method and entangled state representation

Abstract

In this paper, we derive two new generating functions of Laguerre-polynomials, which look like the negative binomial theorem for the Laguerre function Lnx, by adopting the bi-partite entangled state representation and the operator-Hermite-polynomial HnX method, where X is the coordinate operator. Their application in investigating the density operator of photon loss of chaotic light is presented, and a new partition of Fock space in terms of the density operator of the negative binomial field is obtained. We also point out that the power-series definition of the Laguerre-polynomial originates from the Hermite polynomial. As a by-product, we derive a new Laguerre-polynomials-operator generating formula by virtue of the method of integration within an ordered product of operators.