Ab initio experimental violation of Bell inequalities
The violation of a Bell inequality is the paradigmatic example of device-independent quantum information: The nonclassicality of the data is certified without the knowledge of the functioning of devices. In practice, however, all Bell experiments rely on the precise understanding of the underlying p...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-02-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.013159 |
| _version_ | 1827285544693923840 |
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| author | Davide Poderini Emanuele Polino Giovanni Rodari Alessia Suprano Rafael Chaves Fabio Sciarrino |
| author_facet | Davide Poderini Emanuele Polino Giovanni Rodari Alessia Suprano Rafael Chaves Fabio Sciarrino |
| author_sort | Davide Poderini |
| collection | DOAJ |
| description | The violation of a Bell inequality is the paradigmatic example of device-independent quantum information: The nonclassicality of the data is certified without the knowledge of the functioning of devices. In practice, however, all Bell experiments rely on the precise understanding of the underlying physical mechanisms. Given that, it is natural to ask: Can one witness nonclassical behavior in a truly black-box scenario? Here, we propose and implement, computationally and experimentally, a solution to this ab initio task. It exploits a robust automated optimization approach based on the stochastic Nelder-Mead algorithm. Treating preparation and measurement devices as black boxes, and relying on the observed statistics only, our adaptive protocol approaches the optimal Bell inequality violation after a limited number of iterations for a variety photonic states, measurement responses, and Bell scenarios. In particular, we exploit it for randomness certification from unknown states and measurements. Our results demonstrate the power of automated algorithms, opening a venue for the experimental implementation of device-independent quantum technologies. |
| first_indexed | 2024-04-24T10:16:32Z |
| format | Article |
| id | doaj.art-afa7712834fe4afea7a171a2b306972d |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:16:32Z |
| publishDate | 2022-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-afa7712834fe4afea7a171a2b306972d2024-04-12T17:18:35ZengAmerican Physical SocietyPhysical Review Research2643-15642022-02-014101315910.1103/PhysRevResearch.4.013159Ab initio experimental violation of Bell inequalitiesDavide PoderiniEmanuele PolinoGiovanni RodariAlessia SupranoRafael ChavesFabio SciarrinoThe violation of a Bell inequality is the paradigmatic example of device-independent quantum information: The nonclassicality of the data is certified without the knowledge of the functioning of devices. In practice, however, all Bell experiments rely on the precise understanding of the underlying physical mechanisms. Given that, it is natural to ask: Can one witness nonclassical behavior in a truly black-box scenario? Here, we propose and implement, computationally and experimentally, a solution to this ab initio task. It exploits a robust automated optimization approach based on the stochastic Nelder-Mead algorithm. Treating preparation and measurement devices as black boxes, and relying on the observed statistics only, our adaptive protocol approaches the optimal Bell inequality violation after a limited number of iterations for a variety photonic states, measurement responses, and Bell scenarios. In particular, we exploit it for randomness certification from unknown states and measurements. Our results demonstrate the power of automated algorithms, opening a venue for the experimental implementation of device-independent quantum technologies.http://doi.org/10.1103/PhysRevResearch.4.013159 |
| spellingShingle | Davide Poderini Emanuele Polino Giovanni Rodari Alessia Suprano Rafael Chaves Fabio Sciarrino Ab initio experimental violation of Bell inequalities Physical Review Research |
| title | Ab initio experimental violation of Bell inequalities |
| title_full | Ab initio experimental violation of Bell inequalities |
| title_fullStr | Ab initio experimental violation of Bell inequalities |
| title_full_unstemmed | Ab initio experimental violation of Bell inequalities |
| title_short | Ab initio experimental violation of Bell inequalities |
| title_sort | ab initio experimental violation of bell inequalities |
| url | http://doi.org/10.1103/PhysRevResearch.4.013159 |
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