New Approach for Normalizing Photon-Added and Photon-Subtracted Squeezed States

We present a new concise approach for normalizing m-photon-added squeezed state -photon-subtracted squeezed state , i.e., we construct the generating function andrespectively, after calculating them and comparing the result with the standard form of generating function of Legendre polynomials P_m,we find m_{m^=m!cosh m^rPm^{(cosh r)}}, and , where r is the squeezing parameter.