Experimental Test of the Quantum Non-Gaussian Character of a Heralded Single-Photon State
Miroslav Ježek, Ivo Straka, Michal Mičuda, Miloslav Dušek, Jaromı́r Fiurášek, Radim Filip · Physical Review Letters · 2011
We report on the experimental verification of quantum non-Gaussian character of a heralded single-photon state with a positive Wigner function. We unambiguously demonstrate that the generated state cannot be expressed as a mixture of Gaussian states. Sufficient information to witness the quantum non-Gaussian character is obtained from a standard photon anticorrelation measurement.