Signal characters and non-classical properties of quadratically amplified squeezed vacuum
Qiang Ke, Yifan Wang, Yanbei Cheng, Xue-xiang Xu · Modern Physics Letters B · 2020
Based on the squeezed vacuum (SV) and the quadratic function of the photon number operator, we introduce the quadratically amplified squeezed vacuum (QASV) in this paper. We study the intensity, noise, squeezing effect, antibunching effect, and Wigner function of the QASVs. Compared with the SV, the QASVs have distinctive signal characters and possess peculiar non-classical properties in the proper range of interaction parameters.