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.

Department of Optics Palacký University Olomouc Czech Republic

References provided by Crossref.org

Taming numerical errors in simulations of continuous variable non-Gaussian state preparation

Experimental demonstration of a fully inseparable quantum state with nonlocalizable entanglement

Estimation of nonclassical independent Gaussian processes by classical interferometry

Nonclassical light from a large number of independent single-photon emitters