We investigate theoretically the deterministic generation of quantum states with negative Wigner functions, by using giant non-linearities due to collisional interactions between Rydberg polaritons. The state resulting from the polariton interactions may be transferred with high fidelity into a photonic state, which can be analyzed using homodyne detection followed by quantum tomography. Besides generating highly non-classical states of the light, this method can also provide a very sensitive probe for the physics of the collisions involving Rydberg states.
@article{arxiv.1203.6764,
title = {Generating non-Gaussian states using collisions between Rydberg polaritons},
author = {Jovica Stanojevic and Valentina Parigi and Erwan Bimbard and Alexei Ourjoumtsev and Pierre Pillet and Philippe Grangier},
journal= {arXiv preprint arXiv:1203.6764},
year = {2015}
}