Simple 2.5 GHz time-bin quantum key distribution

Boaron, Alberto; Korzh, Boris; Houlmann, Raphaël; Boso, Gianluca; Rusca, Davide; Gray, S.; Li, Mingjun; Nolan, Daniel A.; Martin, Anthony; Zbinden, Hugo

doi:10.1063/1.5027030

Cited by 92 publications

(63 citation statements)

References 23 publications

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“…In this paper, we present an experiment that takes advantage of state-of-the-art performance on all fronts to push the limits to new heights. We rely on a new 2.5 GHz clocked setup [6], low-loss fibers, in-house-made highly efficient superconducting detectors [7] and last but not least a very efficient one-decoy state scheme [8]. Finally, we achieve an improvement of the secret key rate (SKR) by four orders of magnitudes with respect to a comparable experiment over 400 km.…”

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Secure Quantum Key Distribution over 421 km of Optical Fiber

et al. 2018

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“…We implement the protocol presented in Boaron et al [6]. For the sake of simplicity of the setup, we use a three-state time-bin scheme: two states in the Z basis (a weak coherent pulse in the first or the second timebin, respectively) and one state in the X basis (a superposition of two pluses in both time-bins).…”

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Secure Quantum Key Distribution over 421 km of Optical Fiber

et al. 2018

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“…The security of key bits are information-theoretical benefiting from their physical generating process [2,3]. A lot of research works have been devoted to get higher secure key rate (SKR), longer secure transmission distance in a QKD point-to-point link [4][5][6][7][8], as well as more flexible connections and higher user capacities in QKD networks [9][10][11][12]. The photonic layer, which can generate, modulate and detect photon pulses at the single photon level, is the kernel of QKD.…”

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confidence: 99%

Quantum Key Distribution with On‐Chip Dissipative Kerr Soliton

Wang

Niu

et al. 2020

Laser & Photonics Reviews

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Quantum key distribution (QKD) can distribute symmetric key bits between remote legitimate users with the guarantee of quantum mechanics principles. For practical applications, there is increasing attention to integrating the source, detectors, and modulators on a photonic chip. Here, the Kerr dissipative soliton is introduced in a microresonator as the light source for GHz QKD systems, and the proof‐of‐principle experiment demonstrates the parallel QKD can be achieved using coherent comb lines from the soliton. The performance of parallel QKD is also verified by using the off‐the‐shelf wavelength division modules and the on‐chip soliton source. Since the on‐chip soliton can provide hundreds of carriers covering the C and L bands, the results exhibit the feasibility to achieve ultra‐high rate secure key bits through massively parallel QKD, especially when incorporated with the thriving photonic integrated circuit technology.

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“…However, despite the recent results of SQC, several technical challenges still remain, mainly in terms of achievable repetition rate and secret key rate, as well as link stability. In fact, fiber-optics based implementations are still the benchmark for repetition rate [32,33], obtained * paolo.villoresi@dei.unipd.it secure key rate [34,35] and stability [36,37]. On the other hand, recent satellite-based QKD experiments are limited to 100 MHz repetition rate, few kilohertz of secure key rate with Low Earth Orbit (LEO) satellites, 2 ns detection window, and link duration of few minutes [14].…”

Section: Introductionmentioning

confidence: 99%

Sub-ns timing accuracy for satellite quantum communications

et al. 2019

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Satellite quantum communications have rapidly evolved in the past few years, culminating in the proposal, development and deployment of satellite missions dedicated to Quantum Key Distribution and the realization of fundamental tests of quantum mechanics in space. However, in comparison with the more mature technology based on fiber optics, several challenges are still open, such as the capability of detecting with high temporal accuracy single photons coming from orbiting terminals. Satellite Laser Ranging, commonly used to estimate satellite distance, could also be exploited to overcome this challenge. For example, high repetition rates and low background noise can be obtained by determining the time-of-flight of faint laser pulses that are retro-reflected by geodynamics satellites and then detected on Earth at the single-photon level. Here we report on a experiment achieving a temporal accuracy of about 230 ps in the detection of an optical signal of few photons per pulse reflected by satellites in medium Earth orbit, at a distance exceeding 7500 km by using commercially available detectors. Lastly, the performance of the Matera Laser Ranging Observatory are evaluated in terms of detection rate and signal to noise ratio for satellite quantum communications.

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Simple 2.5 GHz time-bin quantum key distribution

Cited by 92 publications

References 23 publications

Secure Quantum Key Distribution over 421 km of Optical Fiber

Secure Quantum Key Distribution over 421 km of Optical Fiber

Quantum Key Distribution with On‐Chip Dissipative Kerr Soliton

Sub-ns timing accuracy for satellite quantum communications

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