Squeezed States Generated by Boson Creation Operator

Using the normal ordering techniques of an operator, we show that a general squeezed state may be expressed in the form N exp 1/2 ξ â σ² m nâ σ] S 0 ¢, where S 0 ¢ is the vacuum state. We obtain the normalization constant N and various other representations. We also discuss conditions for squeezing and photon antibunching.