Silicon-based decoder for polarization-encoding quantum key distribution

Du, Yongqiang; Zhu, Xun; Hua, Xin; Zhao, Zhengeng; Hu, Xiao; Qian, Yi; Xiao, Xi; Wei, Kejin

doi:10.1016/j.chip.2023.100039

Cited by 22 publications

(9 citation statements)

References 65 publications

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“…Detailed information about the principles, fabrication process, and parameters of the polarization state decoder chip can be found in Ref. 57,58 .…”

Section: /9mentioning

confidence: 99%

Source-independent quantum random number generators with integrated silicon photonics

Wei,

Du,

Hua

et al. 2024

Preprint

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Random numbers play a crucial role in numerous scientific applications. Source-independent quantum random number generators (SI-QRNGs) can offer true randomness by leveraging the fundamental principles of quantum mechanics, eliminating the need for a trusted source. Silicon photonics shows great promise for QRNG due to its benefits in miniaturization, cost-effective device manufacturing, and compatibility with CMOS microelectronics. In this study, we experimentally demonstrate a silicon-based discrete variable SI-QRNG. Using a well-calibrated chip and an optimized parameter strategy, we have achieved the highest quantum random number generation rate of 7.9 Mbits/s. Our research paves the way for integrated SI-QRNGs.

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“…Detailed information about the principles, fabrication process, and parameters of the polarization state decoder chip can be found in Ref. 57,58 .…”

Section: /9mentioning

confidence: 99%

Source-independent quantum random number generators with integrated silicon photonics

Wei,

Du,

Hua

et al. 2024

Preprint

Self Cite

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“…Quantum key distribution (QKD) [1,2] is grounded in the fundamental principles of quantum mechanics, enabling the theoretical attainment of unconditionally secure communication. QKD has made substantial theoretical progress [3][4][5][6][7][8][9] and achieved successful experimental demonstrations [10][11][12][13][14][15][16][17][18]. Moreover, several QKD networks have been reported [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Boosting asymmetric measurement-device-independent quantum key distribution via numerical-analysis technology

Li,

Zheng,

Zhang

et al. 2024

Phys. Scr.

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Asymmetric measurement-device-independent quantum key distribution (MDI-QKD) enables building a scalable, high-rate quantum network with an untrusted relay in real-world scenarios. In this study, we improve the performance of asymmetric MDI-QKD using numerical analysis techniques. Simulation results show a twofold increase in tolerance to basis misalignment compared to the previous state-of-the-art method. Specifically, for instances of substantial basis misalignment, the key rate increases by an order of magnitude, and the maximum communication distance extends by 20 km. Our work significantly enhances the robustness and feasibility of asymmetric MDI-QKD, thereby promoting the widespread deployment of MDI-QKD networks.

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“…Conventionally, TBHDs are fabricated using free-space optical devices or fiber optical devices [21,22]. With considerable developments in quantum information and large-scale optical integration technology, realizing the conventional functions of TBHD on an integrated platform is imperative [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Silicon photonics-integrated time-domain balanced homodyne detector for quantum tomography and quantum key distribution

Jia,

Wang,

et al. 2023

New J. Phys.

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We designed and experimentally demonstrated a silicon photonics-integrated time-domain balanced homodyne detector (TBHD), containing an optical part of 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. Our TBHD technologies are expected to be used in silicon photonics-integrated CVQKD system and silicon photonics-integrated BB84 heterodyne system.

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Silicon-based decoder for polarization-encoding quantum key distribution

Cited by 22 publications

References 65 publications

Source-independent quantum random number generators with integrated silicon photonics

Source-independent quantum random number generators with integrated silicon photonics

Boosting asymmetric measurement-device-independent quantum key distribution via numerical-analysis technology

Silicon photonics-integrated time-domain balanced homodyne detector for quantum tomography and quantum key distribution

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