2019/10/03 by Francesco Graffitti, Peter Barrow, Alexander Pickston +2
Computer Science · Engineering · Physics and Astronomy · #Neural Networks and Reservoir Computing #Optical Network Technologies #Photon #Photon entanglement #Photonic and Optical Devices #Photonics #Physics #Quantum #Quantum channel #Quantum entanglement #Quantum imaging #Quantum information #Quantum mechanics #Quantum metrology #Quantum network #Quantum sensor #W state #physics.optics #quant-ph
paper · pdf · doi:10.1103/physrevlett.124.053603
published as Phys. Rev. Lett. 124, 053603 (2020) · 5 pages, 4 figures, 3 pages supplemental material
arxiv created 2019/10/03 · openalex created_date 2019/10/10 · openalex publication_date 2020/02/04 · arxiv updated 2020/02/12 · openalex updated_date 2026/08/05
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 down-conversion processes. We achieve unprecedented quality in state generation-high rates, heralding efficiency, and state fidelity-as characterized via highly resolved time-of-flight fiber spectroscopy and two-photon interference. We employ this technique in a four-photon entanglement swapping scheme as a primitive for TFM-encoded quantum protocols.