SOME STATISTICAL PROPERTIES OF THE EVEN AND THE ODD NEGATIVE BINOMIALSTATES

New states of electromagnetic field, i.e. even and odd negative binomi al states are introduced here. These states interpolate between the ev en (odd) coherent states and the even (odd) quasi-thermal states. Vari ous statistical properties of these states such as the mean photon num ber, second-order coherence function, normal squeezing are calculated. The Wigner function for these states are also discussed. These result s may be useful for carrying out systematic study of the non-classical properties of 'Schrodinger cat states' as one moves from even (odd) c oherent state to even (odd) quasi-thermal state.