New approach for obtaining the squeezing-enhanced state and its Wigner function by virtue of the Weyl-Wigner quantization scheme

By virtue of the Weyl-Wigner quantization scheme, we derive the explicit form of the squeezing-enhanced state without disentangling the generalized squeezing operator exp[-i lambda/2 (Q(2)e(r) - e(-r) P-2)], where Q and P are two quadratures of the light field; this approach is convenient and concise. By virtue of the Weyl-ordering invariance under similar transformations, the Wigner function of the squeezing-enhanced state is derived and its figure is depicted, which clearly exhibits the squeezing enhancement.