Silicon photonics-integrated time-domain balanced homodyne detector in continuous-variable quantum key distribution
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866911761343447040 |
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| author | Jia, Yanxiang Wang, Xuyang Hu, Xiao Hua, Xin Zhang, Yu Guo, Xubo Zhang, Shengxiang Xiao, Xi Yu, Shaohua Zou, Jun Li, Yongmin |
| author_facet | Jia, Yanxiang Wang, Xuyang Hu, Xiao Hua, Xin Zhang, Yu Guo, Xubo Zhang, Shengxiang Xiao, Xi Yu, Shaohua Zou, Jun Li, Yongmin |
| contents | We designed and experimentally demonstrated a silicon photonics-integrated time-domain balanced homodyne detector (TBHD), whose optical part has dimensions of 1.5 mm * 0.4 mm. To automatically and accurately balance the detector, new variable optical attenuators were used, and a common mode rejection ratio of 86.9 dB could be achieved. In the quantum tomography experiment, the density matrix and Wigner function of a coherent state were reconstructed with 99.97 % fidelity. The feasibility of this TBHD in a continuous-variable quantum key distribution (CVQKD) system was also demonstrated. This facilitates the integration of the optical circuits of the CVQKD system based on the GG02 protocol on the silicon photonics chip using TBHD. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_03419 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Silicon photonics-integrated time-domain balanced homodyne detector in continuous-variable quantum key distribution Jia, Yanxiang Wang, Xuyang Hu, Xiao Hua, Xin Zhang, Yu Guo, Xubo Zhang, Shengxiang Xiao, Xi Yu, Shaohua Zou, Jun Li, Yongmin Quantum Physics We designed and experimentally demonstrated a silicon photonics-integrated time-domain balanced homodyne detector (TBHD), whose optical part has dimensions of 1.5 mm * 0.4 mm. To automatically and accurately balance the detector, new variable optical attenuators were used, and a common mode rejection ratio of 86.9 dB could be achieved. In the quantum tomography experiment, the density matrix and Wigner function of a coherent state were reconstructed with 99.97 % fidelity. The feasibility of this TBHD in a continuous-variable quantum key distribution (CVQKD) system was also demonstrated. This facilitates the integration of the optical circuits of the CVQKD system based on the GG02 protocol on the silicon photonics chip using TBHD. |
| title | Silicon photonics-integrated time-domain balanced homodyne detector in continuous-variable quantum key distribution |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2305.03419 |