Investigating the entanglement of squeezing modes using Wigner function analysis

In this article, we investigate photonic squeezed states with a special initial state. For this purpose, first, we consider a special initial state of two modes, then we squeezed one or two modes. In the following, we describe a method based on the Wigner function for the entanglement of the system, first we write the state of the system in the phase space using the Wigner function, and then apply the squeezing operator to the Wigner function of a system, next the state of the system transferred from the phase space to the Hilbert space. I do. In the end, we obtain the degree of entanglement for N=1,2 states by using concurrence. In this article, you can see the effect of the initial state and the number of modes used on the degree of entanglement of the system.