Contextuality-based quantum key distribution with deterministic single-photon sources
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917014827696128 |
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| author | Meng, Yu Saha, Debashis Mikkelsen, Mikkel Thorbjørn Henke, Clara Wang, Ying Bart, Nikolai Ludwig, Arne Lodahl, Peter Cabello, Adán Midolo, Leonardo |
| author_facet | Meng, Yu Saha, Debashis Mikkelsen, Mikkel Thorbjørn Henke, Clara Wang, Ying Bart, Nikolai Ludwig, Arne Lodahl, Peter Cabello, Adán Midolo, Leonardo |
| contents | Photons are central to quantum technologies, with photonic qubits offering a promising platform for quantum communication. Semiconductor quantum dots stand out for their ability to generate single photons on demand, a key capability for enabling long-distance quantum networks. In this work, we utilize high-purity single-photon sources based on self-assembled InAs(Ga)As quantum dots as quantum information carriers. We demonstrate that such on-demand single photons can generate quantum contextuality. This capability enables a novel protocol for semi-device-independent quantum key distribution over free-space channels. Crucially, our method does not require ideal or perfectly projective measurements, opening a new pathway for robust and practical quantum communication. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_12761 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Contextuality-based quantum key distribution with deterministic single-photon sources Meng, Yu Saha, Debashis Mikkelsen, Mikkel Thorbjørn Henke, Clara Wang, Ying Bart, Nikolai Ludwig, Arne Lodahl, Peter Cabello, Adán Midolo, Leonardo Quantum Physics Photons are central to quantum technologies, with photonic qubits offering a promising platform for quantum communication. Semiconductor quantum dots stand out for their ability to generate single photons on demand, a key capability for enabling long-distance quantum networks. In this work, we utilize high-purity single-photon sources based on self-assembled InAs(Ga)As quantum dots as quantum information carriers. We demonstrate that such on-demand single photons can generate quantum contextuality. This capability enables a novel protocol for semi-device-independent quantum key distribution over free-space channels. Crucially, our method does not require ideal or perfectly projective measurements, opening a new pathway for robust and practical quantum communication. |
| title | Contextuality-based quantum key distribution with deterministic single-photon sources |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.12761 |