NONCLASSICAL PROPERTIES OF PHOTON-ADDED PAIR COHERENT STATES

The two-mode photon-added state defined by |\zeta,q;m>=a^+mb^+m|\zeta,q> up to a normalization constant is introduced, where |\zeta,q> is a pair coherent state and m an integer. It is shown that the fields in such a state have remarkable quantum features such as sub-Poissonian statistics, violations of Cauch-Schwarz inequalities, correlations in the number fluctuations and squeezing. We examine the influence of photon-adding on the properties of pair coherent of cavity quantum electrodynamics.