Article
Single-photon quantum contextuality on a chip
Author/s | Crespi, Andrea
Bentivegna, Marco Pitsios, Ioannis Rusca, Davide Poderini, Davide Carvacho, Gonzalo D'Ambrosio, Vincenzo Cabello Quintero, Adán ![]() ![]() ![]() ![]() ![]() ![]() Sciarrino, Fabio Osellame, Roberto |
Department | Universidad de Sevilla. Departamento de Física Aplicada II |
Publication Date | 2017-10-17 |
Deposit Date | 2024-01-11 |
Published in |
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Abstract | In classical physics, properties of objects exist independently of the context, i.e., whether and how measurements are performed. Quantum physics showed this assumption to be wrong, and that Nature is indeed “contextual”. ... In classical physics, properties of objects exist independently of the context, i.e., whether and how measurements are performed. Quantum physics showed this assumption to be wrong, and that Nature is indeed “contextual”. Contextuality has been observed in the simplest physical systems, such as single particles, and plays fundamental roles in quantum computation advantage. Here, we demonstrate for the first time quantum contextuality in an integrated photonic chip. The chip implements different combinations of measurements on a single photon delocalized on four distinct spatial modes, showing violations of a Clauser–Horne–Shimony–Holt (CHSH)-like noncontextuality inequality. This paves the way to compact and portable devices for contextuality-based quantum-powered protocols. |
Funding agencies | European Research Council (ERC) Ministerio de Economia, Industria y Competitividad (MINECO). España Knut and Alice Wallenberg Foundation, Sweden |
Project ID. | 307783
![]() 641039 ![]() 608062 ![]() FIS2014-60843-P ![]() |
Citation | Crespi, A., Bentivegna, M., Pitsios, I., Rusca, D., Poderini, D., Carvacho, G.,...,Osellame, R. (2017). Single-photon quantum contextuality on a chip. ACS Photonics, 4 (11), 2807-2812. https://doi.org/10.1021/acsphotonics.7b00793. |
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