We describe the observation of a degaussification protocol that maps individual pulses of squeezed light onto non-Gaussian states. This effect is obtained by sending a small fraction of the squeezed vacuum beam onto an avalanche photodiode, and by conditioning the single-shot homodyne detection of the remaining state upon the photon-counting events. The experimental data provides a clear evidence of phase-dependent non-Gaussian statistics. This protocol is closely related to the first step of an entanglement distillation procedure for continuous variables.
@article{arxiv.quant-ph/0402192,
title = {Non-gaussian statistics from individual pulses of squeezed light},
author = {J. Wenger and R. Tualle-Brouri and P. Grangier},
journal= {arXiv preprint arXiv:quant-ph/0402192},
year = {2009}
}