Towards an All-Silicon QKD Transmitter Sourced by a Ge-on-Si Light Emitter
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913335377657856 |
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| author | Honz, Florian Vokić, Nemanja Hentschel, Michael Walther, Philip Hübel, Hannes Schrenk, Bernhard |
| author_facet | Honz, Florian Vokić, Nemanja Hentschel, Michael Walther, Philip Hübel, Hannes Schrenk, Bernhard |
| contents | We demonstrate a novel transmitter concept for quantum key distribution based on the polarization-encoded BB84 protocol, which is sourced by the incoherent light of a forward-biased Ge-on-Si PIN junction. We investigate two architectures for quantum state preparation, including independent polarization encoding through multiple modulators and a simplified approach leveraging on an interferometric polarization modulator. We experimentally prove that the Ge-on-Si light source can accommodate for quantum key generation by accomplishing raw-key rates of 2.15 kbit/s at a quantum bit error ratio of 7.71% at a symbol rate of 1 GHz. We further investigate the impact of depolarization along fiber-based transmission channels in combination with the broadband nature of the incoherent light source. Our results prove the feasibility of a fully-integrated silicon quantum key distribution transmitter, including its light source, for possible short-reach applications in zero-trust intra-datacenter environments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_13505 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Towards an All-Silicon QKD Transmitter Sourced by a Ge-on-Si Light Emitter Honz, Florian Vokić, Nemanja Hentschel, Michael Walther, Philip Hübel, Hannes Schrenk, Bernhard Quantum Physics We demonstrate a novel transmitter concept for quantum key distribution based on the polarization-encoded BB84 protocol, which is sourced by the incoherent light of a forward-biased Ge-on-Si PIN junction. We investigate two architectures for quantum state preparation, including independent polarization encoding through multiple modulators and a simplified approach leveraging on an interferometric polarization modulator. We experimentally prove that the Ge-on-Si light source can accommodate for quantum key generation by accomplishing raw-key rates of 2.15 kbit/s at a quantum bit error ratio of 7.71% at a symbol rate of 1 GHz. We further investigate the impact of depolarization along fiber-based transmission channels in combination with the broadband nature of the incoherent light source. Our results prove the feasibility of a fully-integrated silicon quantum key distribution transmitter, including its light source, for possible short-reach applications in zero-trust intra-datacenter environments. |
| title | Towards an All-Silicon QKD Transmitter Sourced by a Ge-on-Si Light Emitter |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2403.13505 |