The continuous-variable entanglement in a phase-mismatched frequency non-degenerated optical parametric amplifier

Abstract

We present a new analytical solution for Fokker–Planck equation of phase-mismatched frequency non-degenerate optical parametric amplifier (FNOPA). We investigate the squeezing and continuous variable (CV) entanglement characteristic of a FNOPA working at phase-mismatched condition. We numerically calculate the dependence of the CV entanglement on the relative loss parameter ξ and the phase-mismatched parameter $\tilde{\mathit{\eta }}$. The smaller $\tilde{\mathit{\eta }}$ can bring a long-time entanglement. This method can also be applied to multipartite entanglement situation.

Keywords:

• Analytical solution
• phase-mismatched
• continuous-variable entanglement
• non-degenerated optical parametric amplifier