Single pair measurement of CHSH by weak measurements and applications

Marco Genovese

doi:10.1117/12.3011727

13 March 2024 Single pair measurement of CHSH by weak measurements and applications

Marco Genovese

Proceedings Volume PC12912, Quantum Sensing, Imaging, and Precision Metrology II; PC129123L (2024) https://doi.org/10.1117/12.3011727
Event: SPIE Quantum West, 2024, San Francisco, California, United States

Abstract

Bell inequalities are one of the cornerstones of quantum foundations and fundamental tools for quantum tech. [1], tied to specific aspects of quantum mechanics, as quantum non-locality [2]. We present here the first single-pair Bell inequality test [3] able to obtain a Bell parameter value for every entangled pair detected. This is made possible by exploiting sequential weak measurements, allowing to perform non-commuting measurements in sequence on the same state, on each entangled particle. Such a feature grants unprecedented measurement capability. We also demonstrate how, after the Bell parameter measurement, the pair under test still presents a noteworthy amount of entanglement, providing evidence of the absence of the wave function collapse and allowing us to exploit this quantum resource for further protocols. We will discuss possible applications. [1] M.Genovese, Physics Reports 413 (2005) 319 [2] M. Genovese, M. Gramegna, Applied Science 9 (2019) 5406. [3] S.Virzì, et al. arXiv:2303.04787

Conference Presentation

Citation Download Citation

Marco Genovese "Single pair measurement of CHSH by weak measurements and applications", Proc. SPIE PC12912, Quantum Sensing, Imaging, and Precision Metrology II, PC129123L (13 March 2024); https://doi.org/10.1117/12.3011727

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