Southwest Quantum Information and Technology

The role of spectral entanglement in two- and four-photon interference

Presenting Author: Sofiane Merkouche, University of Oregon
Contributing Author(s): Valerian Thiel, Alex O. C. Davis, Brian J. Smith

We investigate theoretically and experimentally the role of spectral entanglement in two- and four-photon interference. Using a double-passed parametric down-conversion source, we observe several different interference effects in two-fold and four-fold coincidences, and identify which of these correspond to non-classical effects and non-local correlations. We use this scheme to implement an entanglement-swapping experiment in the spectral domain, and verify entanglement in the swapped state through Hong-Ou-Mandel interference. We show how these results are relevant to quantum communication and metrology protocols relying on information encoding in the time-frequency domain of light.

(Session : from 5:00pm - 7:00pm)