In this work we demonstrate the use of stimulated emission tomography to characterize a hyper-entangled state generated by spontaneous parametric down-conversion in a CW-pumped source. In particular, we consider the generation of hyper-entangled states consisting of photon pairs entangled in polarisation and path. These results extend the capability of stimulated emission tomography beyond the polarisation degree of freedom, and demonstrate the use of this technique to study states in higher dimension Hilbert spaces.
@article{arxiv.1812.08423,
title = {Stimulated Emission Tomography: Beyond Polarization},
author = {Mario Arnolfo Ciampini and Andrea Geraldi and Valeria Cimini and Chiara Macchiavello and J. E. Sipe and M. Liscidini and Paolo Mataloni},
journal= {arXiv preprint arXiv:1812.08423},
year = {2019}
}