Generation of multi-photon entangled states with integrated optical frequency comb sources
Christian Reimer, Michael Kues, Piotr Roztocki, Lucia Caspani, Yaron Bromberg, Benjamin Wetzel, Brent E. Little, Sai T. Chu, David Moss, Roberto Morandotti · 2016
We demonstrate that four-photon entangled qubit states can be generated from an optical frequency combs source. This state generation is evidenced by four-photon quantum interference, and quantum state tomography reveals a fidelity above 64%.