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Implementation of quantum key distribution surpassing the linear rate-transmittance bound

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0 Published in 2020 at "Nature Photonics"

DOI: 10.1038/s41566-020-0599-8

Abstract: Quantum key distribution (QKD) 1 , 2 offers a long-term solution to secure key exchange. Due to photon loss in transmission, it was believed that the repeaterless key rate is bounded by a linear function… read more here.

Keywords: quantum; key rate; key distribution; rate ... See more keywords

Higher key rate of measurement-device-independent quantum key distribution through joint data processing

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0 Published in 2021 at "Physical Review A"

DOI: 10.1103/physreva.103.012402

Abstract: We propose a method named as double-scanning method to improve the key rate of measurement-device-independent quantum key distribution (MDI-QKD) drastically. In the method, two parameters are scanned simultaneously to tightly estimate the counts of single-photon… read more here.

Keywords: independent quantum; rate measurement; device independent; rate ... See more keywords

Secret key rate of a continuous-variable quantum-key-distribution scheme when the detection process is inaccessible to eavesdroppers

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0 Published in 2018 at "Physical Review A"

DOI: 10.1103/physreva.98.042319

Abstract: We have developed a method to calculate a secret key rate of a continuous-variable quantum-key-distribution scheme using four coherent states and postselection for a general model of Gaussian attacks. We assume that the transmission line… read more here.

Keywords: detection process; key rate; detection; scheme ... See more keywords

High key rate continuous-variable quantum key distribution with a real local oscillator.

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0 Published in 2018 at "Optics express"

DOI: 10.1364/oe.26.002794

Abstract: Continuous-variable quantum key distribution (CVQKD) with a real local oscillator (LO) has been extensively studied recently due to its security and simplicity. In this paper, we propose a novel implementation of a high-key-rate CVQKD with… read more here.

Keywords: quantum; high key; continuous variable; key rate ... See more keywords

Sub-Mbps key-rate continuous-variable quantum key distribution with local local oscillator over 100-km fiber.

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1 Published in 2022 at "Optics letters"

DOI: 10.1364/ol.485913

Abstract: We experimentally demonstrated a sub-Mbps key rate Gaussian-modulated coherent-state (GMCS) continuous-variable quantum key distribution (CV-QKD) over a 100-km transmission distance. To efficiently control the excess noise, the quantum signal and the pilot tone are co-transmitted… read more here.

Keywords: key distribution; key rate; quantum key;