Quantum Interference of Electromagnetic Fields from Remote Quantum Memories
T. Chanelière, Dzmitry Matsukevich, S. D. Jenkins, Shau-Yu Lan, Ran Zhao, T. A. B. Kennedy, A. Kuzmich · Physical Review Letters · 2007
We observe quantum, Hong-Ou-Mandel, interference of fields produced by two remote atomic memories. High-visibility interference is obtained by utilizing the finite atomic memory time in four-photon delayed coincidence measurements. Interference of fields from remote atomic memories is a crucial element in protocols for scalable entanglement distribution.