Biphoton spectral quantum interference for information processing and delay metrology

Suparna Seshadri; Hsuan-Hao Lu; Joseph M. Lukens; Andrew M. Weiner

doi:10.1117/12.2656881

8 March 2023 Biphoton spectral quantum interference for information processing and delay metrology

Suparna Seshadri, Hsuan-Hao Lu, Joseph M. Lukens, Andrew M. Weiner

Proceedings Volume 12446, Quantum Computing, Communication, and Simulation III; 1244605 (2023) https://doi.org/10.1117/12.2656881
Event: SPIE Quantum West, 2023, San Francisco, California, United States

Abstract

Broadband time-energy entangled photons feature strong temporal correlations with potential for precision delay metrology, but previous work has leveraged only time-of-flight information ultimately limited by the detection jitter and resolution of the time-tagging electronics. Firstly, our work pushes the entanglement-based nonlocal delay metrology from the conventional time-of-flight measurement to a new direction—two-photon interferometry with subpicosecond sensitivity independent of detection resolution. Next, we show the selective sensitivity of frequency-bin encoded Bell states to the sum and difference of biphoton-delays by using a novel reconfigurable setup capable of switching between the Bell states by successively employing single and dual spectral-line pumps.

Conference Presentation

Citation Download Citation

Suparna Seshadri, Hsuan-Hao Lu, Joseph M. Lukens, and Andrew M. Weiner "Biphoton spectral quantum interference for information processing and delay metrology", Proc. SPIE 12446, Quantum Computing, Communication, and Simulation III, 1244605 (8 March 2023); https://doi.org/10.1117/12.2656881

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