On-chip semi-device-independent quantum random number generator exploiting contextuality
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2026
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866912820205977600 |
|---|---|
| author | Genzini, Maddalena Vigliar, Caterina Zahidy, Mujtaba Tebyanian, Hamid Gajda, Andrzej Petermann, Klaus Zimmermann, Lars Bacco, Davide Da Ros, Francesco |
| author_facet | Genzini, Maddalena Vigliar, Caterina Zahidy, Mujtaba Tebyanian, Hamid Gajda, Andrzej Petermann, Klaus Zimmermann, Lars Bacco, Davide Da Ros, Francesco |
| contents | We present a semi-device-independent quantum random number generator (QRNG) based on the violation of a contextuality inequality, implemented by the integration of two silicon photonic chips. Our system combines a heralded single-photon source with a reconfigurable interferometric mesh to implement qutrit state preparation, transformations, and measurements suitable for testing a KCBS contextuality inequality. This architecture enables the generation of random numbers from the intrinsic randomness of single-photon interference in a complex optical network, while simultaneously allowing a quantitative certification of their security without requiring entanglement. We observe a contextuality violation exceeding the classical bound by more than 10σ, unambiguously confirming non-classical behavior. From this violation, we certify a conditional min-entropy per experimental round of Hmin = 0.077 +- 0.002, derived via a tailored semidefinite-programming-based security analysis. Each measurement outcome therefore contains at least 0.077 +- 0.002 bits of extractable genuine randomness, corresponding to an asymptotic generation rate of 21.7 +- 0.5 bits/s. These results establish a viable route towards general-purpose, untrusted quantum random number generators compatible with practical integrated photonic quantum networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_08392 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | On-chip semi-device-independent quantum random number generator exploiting contextuality Genzini, Maddalena Vigliar, Caterina Zahidy, Mujtaba Tebyanian, Hamid Gajda, Andrzej Petermann, Klaus Zimmermann, Lars Bacco, Davide Da Ros, Francesco Quantum Physics We present a semi-device-independent quantum random number generator (QRNG) based on the violation of a contextuality inequality, implemented by the integration of two silicon photonic chips. Our system combines a heralded single-photon source with a reconfigurable interferometric mesh to implement qutrit state preparation, transformations, and measurements suitable for testing a KCBS contextuality inequality. This architecture enables the generation of random numbers from the intrinsic randomness of single-photon interference in a complex optical network, while simultaneously allowing a quantitative certification of their security without requiring entanglement. We observe a contextuality violation exceeding the classical bound by more than 10σ, unambiguously confirming non-classical behavior. From this violation, we certify a conditional min-entropy per experimental round of Hmin = 0.077 +- 0.002, derived via a tailored semidefinite-programming-based security analysis. Each measurement outcome therefore contains at least 0.077 +- 0.002 bits of extractable genuine randomness, corresponding to an asymptotic generation rate of 21.7 +- 0.5 bits/s. These results establish a viable route towards general-purpose, untrusted quantum random number generators compatible with practical integrated photonic quantum networks. |
| title | On-chip semi-device-independent quantum random number generator exploiting contextuality |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2601.08392 |