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High-Speed Measurement-Device-Independent Quantum Key Distribution with Integrated Silicon Photonics
- Source :
- Physical Review X, Vol 10, Iss 3, p 031030 (2020)
- Publication Year :
- 2020
- Publisher :
- American Physical Society, 2020.
-
Abstract
- Measurement-device-independent quantum key distribution (MDI QKD) removes all detector side channels and enables secure QKD with an untrusted relay. It is suitable for building a star-type quantum access network, where the complicated and expensive measurement devices are placed in the central untrusted relay and each user requires only a low-cost transmitter, such as an integrated photonic chip. Here, we experimentally demonstrate a 1.25-GHz silicon photonic chip-based MDI QKD system using polarization encoding. The photonic chip transmitters integrate the necessary encoding components for a standard QKD source. We implement random modulations of polarization states and decoy intensities, and demonstrate a finite-key secret rate of 31 bit/s over 36-dB channel loss (or 180-km standard fiber). This key rate is higher than state-of-the-art MDI QKD experiments. The results show that silicon photonic chip-based MDI QKD, benefiting from miniaturization, low-cost manufacture, and compatibility with CMOS microelectronics, is a promising solution for future quantum secure networks.
Details
- Language :
- English
- ISSN :
- 21603308
- Volume :
- 10
- Issue :
- 3
- Database :
- Directory of Open Access Journals
- Journal :
- Physical Review X
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.0d1b2f285f9f4a2eaadf4bf6d2caed80
- Document Type :
- article
- Full Text :
- https://doi.org/10.1103/PhysRevX.10.031030