Single-photon nonlocality in quantum networks
A single-photon maximally entangled state is obtained when a photon impinges on a balanced beamsplitter. Its nonlocal properties have been intensively debated in the quantum optics and foundations communities. It is however clear that a standard Bell test made only of passive optical elements cannot...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-03-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.L012041 |
| _version_ | 1827285508153147392 |
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| author | Paolo Abiuso Tamás Kriváchy Emanuel-Cristian Boghiu Marc-Olivier Renou Alejandro Pozas-Kerstjens Antonio Acín |
| author_facet | Paolo Abiuso Tamás Kriváchy Emanuel-Cristian Boghiu Marc-Olivier Renou Alejandro Pozas-Kerstjens Antonio Acín |
| author_sort | Paolo Abiuso |
| collection | DOAJ |
| description | A single-photon maximally entangled state is obtained when a photon impinges on a balanced beamsplitter. Its nonlocal properties have been intensively debated in the quantum optics and foundations communities. It is however clear that a standard Bell test made only of passive optical elements cannot reveal the nonlocality of this state. We show that the nonlocality of single-photon entangled states can nevertheless be revealed in a quantum network made only of beamsplitters and photodetectors. In our protocol, three single-photon entangled states are distributed in a triangle network, introducing indeterminacy in the photons' paths and creating nonlocal correlations without the need for measurements choices. We discuss a concrete experimental realization and provide numerical evidence of the tolerance of our protocol to standard noise sources. Our results show that single-photon entanglement may constitute a promising solution to generate genuine network-nonlocal correlations useful for Bell-based quantum information protocols. |
| first_indexed | 2024-04-24T10:15:53Z |
| format | Article |
| id | doaj.art-24ac1bb754914665839a6ea626093763 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:15:53Z |
| publishDate | 2022-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-24ac1bb754914665839a6ea6260937632024-04-12T17:19:24ZengAmerican Physical SocietyPhysical Review Research2643-15642022-03-0141L01204110.1103/PhysRevResearch.4.L012041Single-photon nonlocality in quantum networksPaolo AbiusoTamás KriváchyEmanuel-Cristian BoghiuMarc-Olivier RenouAlejandro Pozas-KerstjensAntonio AcínA single-photon maximally entangled state is obtained when a photon impinges on a balanced beamsplitter. Its nonlocal properties have been intensively debated in the quantum optics and foundations communities. It is however clear that a standard Bell test made only of passive optical elements cannot reveal the nonlocality of this state. We show that the nonlocality of single-photon entangled states can nevertheless be revealed in a quantum network made only of beamsplitters and photodetectors. In our protocol, three single-photon entangled states are distributed in a triangle network, introducing indeterminacy in the photons' paths and creating nonlocal correlations without the need for measurements choices. We discuss a concrete experimental realization and provide numerical evidence of the tolerance of our protocol to standard noise sources. Our results show that single-photon entanglement may constitute a promising solution to generate genuine network-nonlocal correlations useful for Bell-based quantum information protocols.http://doi.org/10.1103/PhysRevResearch.4.L012041 |
| spellingShingle | Paolo Abiuso Tamás Kriváchy Emanuel-Cristian Boghiu Marc-Olivier Renou Alejandro Pozas-Kerstjens Antonio Acín Single-photon nonlocality in quantum networks Physical Review Research |
| title | Single-photon nonlocality in quantum networks |
| title_full | Single-photon nonlocality in quantum networks |
| title_fullStr | Single-photon nonlocality in quantum networks |
| title_full_unstemmed | Single-photon nonlocality in quantum networks |
| title_short | Single-photon nonlocality in quantum networks |
| title_sort | single photon nonlocality in quantum networks |
| url | http://doi.org/10.1103/PhysRevResearch.4.L012041 |
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