Post-Measurement Adjustment of the Coincidence Window in Quantum Optics Experiments
| Autor: | Guilherme B. Xavier, Giannini F. Obregon, Gustavo Lima, Miguel Figueroa, Esteban S. Gomez, S. Gómez, Jaime Cariñe |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Quantum optics
General Computer Science Computer science business.industry Field programmable gate arrays Delays Photonics Image edge detection Detectors Clocks Logic gates Field-programmable gate arrays quantum information coincidence counting Detector General Engineering Quantum Physics Coincidence TK1-9971 Datorsystem Optics Gate array Computer Systems Logic gate General Materials Science Electrical engineering. Electronics. Nuclear engineering Quantum information business Coincidence detection in neurobiology |
| Zdroj: | IEEE Access, Vol 9, Pp 94010-94016 (2021) |
| Popis: | We report on an electronic coincidence detection circuit for quantum photonic applications implemented on a field-programmable gate array (FPGA), which records each the time separation between detection events coming from single-photon detectors. We achieve a coincidence window as narrow as 500 ps with a series of optimizations on a readily-available and affordable FPGA development board. Our implementation allows real-time visualization of coincidence measurements for multiple coincidence window widths simultaneously. To demonstrate the advantage of our high-resolution visualization, we certified the generation of polarized entangled photons by collecting data from multiple coincidence windows with minimal accidental counts, obtaining a violation of the Clauser-Horne-Shimony-Holt (CHSH) Bell inequality by more than 338 standard deviations. Our results have shown the applicability of our electronic design in the field of quantum information. Funding Agencies|Fondo Nacional de Desarrollo Cientifico y Tecnologico (FONDECYT)Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)CONICYT FONDECYT [11201348, 1190901, 1180995, 1200859, 3210359]; ANID Millennium Science Initiative Program [ICN17012]; Ceniit Linkoping University; Swedish Research CouncilSwedish Research CouncilEuropean Commission [VR 2017-04470]; QuantERA grant SECRET (VR) [2019-00392]; [ANID/REC/PAI77190088] |
| Databáze: | OpenAIRE |
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