Quantum key distribution ≈ Quantum key distribution
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Secure quantum key distribution with realistic devices Open
In principle, quantum key distribution (QKD) offers information-theoretic security based on the laws of physics. In practice, however, the imperfections of realistic devices might introduce deviations from the idealized models used in secu…
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Measurement-Device-Independent Quantum Key Distribution Over a 404 km Optical Fiber Open
Measurement-device-independent quantum key distribution (MDIQKD) with the decoy-state method negates security threats of both the imperfect single-photon source and detection losses. Lengthening the distance and improving the key rate of q…
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Secure Quantum Key Distribution over 421 km of Optical Fiber Open
We present a quantum key distribution system with a 2.5 GHz repetition rate using a three-state time-bin protocol combined with a one-decoy approach. Taking advantage of superconducting single-photon detectors optimized for quantum key dis…
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Towards Post-Quantum Blockchain: A Review on Blockchain Cryptography Resistant to Quantum Computing Attacks Open
Blockchain and other Distributed Ledger Technologies (DLTs) have evolved\nsignificantly in the last years and their use has been suggested for numerous\napplications due to their ability to provide transparency, redundancy and\naccountabil…
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High-dimensional intracity quantum cryptography with structured photons Open
Quantum key distribution (QKD) promises information-theoretically secure\ncommunication, and is already on the verge of commercialization. Thus far,\ndifferent QKD protocols have been proposed theoretically and implemented\nexperimentally …
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Long-Distance Continuous-Variable Quantum Key Distribution over 202.81 km of Fiber Open
Quantum key distribution provides secure keys resistant to code-breaking quantum computers. The continuous-variable version of quantum key distribution offers the advantages of higher secret key rates in metropolitan areas, as well as the …
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Progress in satellite quantum key distribution Open
Quantum key distribution (QKD) is a family of protocols for growing a private encryption key between two parties. Despite much progress, all ground-based QKD approaches have a distance limit due to atmospheric losses or in-fibre attenuatio…
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Sending-or-Not-Sending with Independent Lasers: Secure Twin-Field Quantum Key Distribution over 509 km Open
Twin-field (TF) quantum key distribution (QKD) promises high key rates over long distances to beat the rate-distance limit. Here, applying the sending-or-not-sending TF QKD protocol, we experimentally demonstrate a secure key distribution …
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Twin-field quantum key distribution with large misalignment error Open
Based on the novel idea of twin-field quantum key distribution, we present a\nsending-or-not-sending twin-field fault tolerant quantum key distribution\nprotocol. Our protocol can access a secure distance longer than 700 km even\nthough th…
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The Impact of Quantum Computing on Present Cryptography Open
The aim of this paper is to elucidate the implications of quantum computing\nin present cryptography and to introduce the reader to basic post-quantum\nalgorithms. In particular the reader can delve into the following subjects:\npresent cr…
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Progress in quantum-dot single photon sources for quantum information technologies: A broad spectrum overview Open
Semiconductor quantum dots (QDs) of various material systems are being heavily researched for the development of solid state single photon emitters, which are required for optical quantum computing and related technologies such as quantum …
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Provably secure and high-rate quantum key distribution with time-bin qudits Open
Information encoded in high-dimensional quantum states can achieve ultrahigh rates over metropolitan distances.
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Making the decoy-state measurement-device-independent quantum key distribution practically useful Open
The relatively low key rate seems to be the major barrier to its practical\nuse for the decoy state measurement device independent quantum key distribution\n(MDIQKD).\n We present a 4-intensity protocol for the decoy-state MDIQKD that huge…
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Integrated silicon photonics for high-speed quantum key distribution Open
Integrated photonics offers great potential for quantum communication devices in terms of complexity, robustness, and scalability.Silicon photonics in particular is a leading platform for quantum photonic technologies, with further benefit…
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Breaking the Rate-Loss Bound of Quantum Key Distribution with Asynchronous Two-Photon Interference Open
Twin-field quantum key distribution can overcome the secret key capacity of\nrepeaterless quantum key distribution via single-photon interference. However,\nto compensate for the channel fluctuations and lock the laser fluctuations, the\nt…
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A device-independent quantum key distribution system for distant users Open
Device-independent quantum key distribution (DIQKD) enables the generation of secret keys over an untrusted channel using uncharacterized and potentially untrusted devices 1–9 . The proper and secure functioning of the devices can be certi…
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Micius quantum experiments in space Open
Quantum theory has been successfully validated in numerous laboratory\nexperiments. But would such a theory, which excellently describes the behavior\nof microscopic physical systems, and its predicted phenomena such as quantum\nentangleme…
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Long-Distance Entanglement Purification for Quantum Communication Open
High-quality long-distance entanglement is essential for both quantum communication and scalable quantum networks. Entanglement purification is to distill high-quality entanglement from low-quality entanglement in a noisy environment and i…
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Quantum Key Distribution Open
The convergence of quantum cryptography with applications used in everyday life is a topic drawing attention from the industrial and academic worlds. The development of quantum electronics has led to the practical achievement of quantum de…
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Security of Continuous-Variable Quantum Key Distribution via a Gaussian de Finetti Reduction Open
Establishing the security of continuous-variable quantum key distribution against general attacks in a realistic finite-size regime is an outstanding open problem in the field of theoretical quantum cryptography if we restrict our attentio…
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Measurement-Device-Independent Quantum Key Distribution over Untrustful Metropolitan Network Open
Quantum cryptography holds the promise to establish an\ninformation-theoretically secure global network. All field tests of\nmetropolitan-scale quantum networks to date are based on trusted relays. The\nsecurity critically relies on the ac…
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High-Speed Implementation of Length-Compatible Privacy Amplification in Continuous-Variable Quantum Key Distribution Open
Privacy amplification is an indispensable step in postprocessing of\ncontinuous-variable quantum key distribution (CV-QKD), which is used to distill\nunconditional secure keys from identical corrected keys between two distant\nlegal partie…
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Experimental Twin-Field Quantum Key Distribution through Sending or Not Sending Open
Channel loss seems to be the most severe limitation on the practical application of long distance quantum key distribution. The idea of twin-field quantum key distribution can improve the key rate from the linear scale of channel loss in t…
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High-Speed Measurement-Device-Independent Quantum Key Distribution with Integrated Silicon Photonics Open
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 …
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Recent progress in quantum photonic chips for quantum communication and internet Open
Recent years have witnessed significant progress in quantum communication and quantum internet with the emerging quantum photonic chips, whose characteristics of scalability, stability, and low cost, flourish and open up new possibilities …
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Simple security proof of twin-field type quantum key distribution protocol Open
Twin-field (TF) quantum key distribution (QKD) was conjectured to beat the private capacity of a point-to-point QKD link by using single-photon interference in a central measuring station. This remarkable conjecture has recently triggered …
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Distributed quantum sensing using continuous-variable multipartite entanglement Open
Distributed quantum sensing uses quantum correlations between multiple sensors to enhance the measurement of unknown parameters beyond the limits of unentangled systems. We describe a sensing scheme that uses continuous-variable multiparti…
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Microwave-optical quantum frequency conversion Open
Photons at microwave and optical frequencies are principal carriers for quantum information. While microwave photons can be effectively controlled at the local circuit level, optical photons can propagate over long distances. High-fidelity…
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Proof-of-Principle Experimental Demonstration of Twin-Field Type Quantum Key Distribution Open
The twin-field (TF) quantum key distribution (QKD) protocol and its variants are highly attractive because they can beat the well-known fundamental limit of the secret key rate for point-to-point QKD without quantum repeaters (repeaterless…
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Quantum Communication Using Semiconductor Quantum Dots Open
Worldwide, enormous efforts are directed toward the development of the so‐called quantum internet. Turning this long‐sought‐after dream into reality is a great challenge that will require breakthroughs in quantum communication and computin…