Quantum non-Gaussian and Gaussian States at Multiple Side-band Frequencies
Katanya B. Kuntz, Hongbin Song, James Webb, Trevor A. Wheatley, Akira Furusawa, Timothy C. Ralph, Elanor H. Huntington · 2014
We simultaneously generate photon-subtracted squeezed vacuum and squeezed vacuum at three frequencies from an optical parametric oscillator by utilizing its frequency nondegenerate side-bands. Quantum non-Gaussianity is demonstrated by applying a novel character witness.