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Direct generation of tailored pulse-mode entanglement
Physical Review Letters ( IF 9.227 ) Pub Date : 
Francesco Graffitti, Peter Barrow, Alexander Pickston, Agata M. Brańczyk, and Alessandro Fedrizzi

Photonic quantum technology increasingly uses frequency encoding to enable higher quantum information density and noise resilience. Pulsed time-frequency modes (TFM) represent a unique class of spectrally encoded quantum states of light that enable a complete framework for quantum information processing. Here, we demonstrate a technique for direct generation of entangled TFM-encoded states in single-pass, tailored downconversion processes. We achieve unprecedented quality in state generation—high rates, heralding efficiency and state fidelity—as characterised via highly resolved time-of-flight fibre spectroscopy and two-photon interference. We employ this technique in a four-photon entanglement swapping scheme as a primitive for TFM-encoded quantum protocols.
更新日期:2020-01-14

 

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