EXCITED EVEN AND ODD COHERENT STATES OF THE RADIATION-FIELD

Two new classes of nonclassical states are defined by exciting Hillery 's even and odd coherent states. Their physical properties are investi gated numerically. It is found that they do not exhibit the squeezing effect but exhibit remarkable characteristics of sub-Poissonian distri bution and antibunching. In sharp contrast to the case of excited Glau ber coherent states, it is observed that the uncertainty of the field quadrature in excited even and odd coherent states increases with the degree of excitation. It is also seen that the Wigner functions associ ated with them take negative values for wider regions of parameters co mpared to those of Hillery's even and odd coherent states.