Limitations on quantum key repeaters [PDF]
Nature Communications, 2015 A major application of quantum communication is the distribution of entangled particles for use in quantum key distribution (QKD). Due to noise in the communication line, QKD is in practice limited to a distance of a few hundred kilometres, and can only be extended to longer distances by use of a quantum repeater, a device which performs entanglement ...
Bäuml Stefan +7 more
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Free‐Space Quantum Key Distribution with Single Photons from Defects in Hexagonal Boron Nitride [PDF]
Advanced Quantum Technologies, 2022 Efficient single photon generation is an important requirement for several practical applications in quantum technologies, including quantum cryptography.
Çağlar Samaner +4 more
semanticscholar +1 more source
Megabits Secure Key Rate Quantum Key Distribution [PDF]
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009 14 pages, 4 ...
Zhang, Q. +12 more
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Polytechnic Journal, 2019 The mechanism of quantum mechanics is considered as the principal method of quantum key distribution for transmitting a cryptographic key between users in unconditionally secure communication.
Omar Sh. Mustafa +2 more
doaj +1 more source
Device-independent quantum key distribution with asymmetric CHSH inequalities
Quantum, 2021 The simplest device-independent quantum key distribution protocol is based on the Clauser-Horne-Shimony-Holt (CHSH) Bell inequality and allows two users, Alice and Bob, to generate a secret key if they observe sufficiently strong correlations.
E. Woodhead, A. Acín, Stefano Pironio
semanticscholar +1 more source
Quantum Key Distribution over 658 km Fiber with Distributed Vibration Sensing. [PDF]
Physical Review Letters, 2021 Twin-field quantum key distribution (TFQKD) promises ultralong secure key distribution which surpasses the rate distance limit and can reduce the number of the trusted nodes in long-haul quantum network.
Jiu-Peng Chen +13 more
semanticscholar +1 more source
Composable security for continuous variable quantum key distribution: Trust levels and practical key rates in wired and wireless networks [PDF]
Physical Review Research, 2021 Continuous variable (CV) quantum key distribution (QKD) provides a powerful setting for secure quantum communications, thanks to the use of room-temperature off-the-shelf optical devices and the potential to reach much higher rates than the standard ...
S. Pirandola
semanticscholar +1 more source
High-performance cavity-enhanced quantum memory with warm atomic cell
Nature Communications, 2022 Quantum memories usually suffer from a trade-off between efficiency and excess noise. Here, by exploiting the time-reversal approach for improving modes matching, the authors show a warm-atomic-cell-based cavity-enhanced memory with 67% efficiency and ...
Lixia Ma +8 more
doaj +1 more source
Quantum repeaters and quantum key distribution: Analysis of secret-key rates [PDF]
Physical Review A, 2013 We analyze various prominent quantum repeater protocols in the context of long-distance quantum key distribution. These protocols are the original quantum repeater proposal by Briegel, D r, Cirac and Zoller, the so-called hybrid quantum repeater using optical coherent states dispersively interacting with atomic spin qubits, and the Duan-Lukin-Cirac ...
Abruzzo, S. +5 more
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Homodyne Detection Quadrature Phase Shift Keying Continuous-Variable Quantum key Distribution with High Excess Noise Tolerance [PDF]
PRX Quantum, 2021 Discrete-modulated continuous-variable quantum key distribution with homodyne detection is widely recognized for its ease of implementation, efficiency with respect to error correction, and its compatibility with modern optical communication devices ...
Wen-Bo Liu +9 more
semanticscholar +1 more source