Direct generation of tailored ultrafast entanglement
09:40 - 10:00
Alessandro Fedrizzi, Francesco Graffitti, Peter Barrow, Alexander Pickston, Massimiliano Proietti, Dmytro Kundys and Agata Branczyk Frequency encoding of photonic quantum bits allows for denser information storage and thus more robust and powerful quantum information protocols. Here we report the direct generation of pulsed temporal entanglement between photons created in a single-pass parametric downconversion experiment. Tailoring specific time-frequency Schmidt modes typically requires specific phase-matching conditions and pulse shapers. We show that nonlinear crystal domain engineering can be used to generate exact time-frequency modes with exceptional quality and verify the generated entanglement via dispersion spectroscopy and two-photon interference. We demonstrate time-frequency entanglement swapping between independently created photons using this method.
