Hong‐Ou‐Mandel interference of polarization qubits stored in independent roomtemperature quantum memories
15:05 - 15:25
Alessia Scriminich, Mael Flament, Sonali Gera, Youngshin Kim, Mehdi Namazi, Steven Sagona-Stophel, Giuseppe Vallone, Paolo Villoresi and Eden Figueroa We measure Hong-Ou-Mandel interference between polarization qubits encoded in weak coherent pulses after storage and retrieval from two independent room-temperature rubidium vapor quantum memories, operating via Electromagnetically-Induced Transparency. We obtain an interference visibility of 41.9% with few-photon-level inputs, and 25.9% with single-photon-level inputs. The results obtained open the way to the implementation of our system in a cryptographic network exploiting for instance memory-assisted MDI-QKD, or for Quantum Repeater applications.
