no code implementations • 14 Jan 2021 • Twesh Upadhyaya, Thomas van Himbeeck, Jie Lin, Norbert Lütkenhaus
We develop a method to connect the infinite-dimensional description of optical continuous-variable quantum key distribution (QKD) protocols to a finite-dimensional formulation.
Dimensionality Reduction Quantum Physics
no code implementations • 22 May 2019 • Ramy Tannous, Zhangdong Ye, Jeongwan Jin, Katanya B. Kuntz, Norbert Lütkenhaus, Thomas Jennewein
We study a novel protocol for reference frame independent (RFI) quantum key distribution (QKD) using six states for Alice and four states for Bob, while previous RFI protocols require a six state analyzer for Bob.
Quantum Physics
no code implementations • 26 Jul 2018 • Jie Lin, Norbert Lütkenhaus
Variations of phase-matching measurement-device-independent quantum key distribution (PM-MDI QKD) protocols have been investigated before, but it was recently discovered that this type of protocol (under the name of twin-field QKD) can beat the linear scaling of the repeaterless bound on secret key rate capacity.
Quantum Physics
no code implementations • 7 Dec 2017 • Piotr K. Tysowski, Xinhua Ling, Norbert Lütkenhaus, Michele Mosca
A network layer provides key generation across a network of nodes connected by quantum links.
Cryptography and Security Networking and Internet Architecture Quantum Physics
no code implementations • 16 Oct 2017 • Adam Winick, Norbert Lütkenhaus, Patrick J. Coles
In this work, we present a reliable, efficient, and tight numerical method for calculating key rates for finite-dimensional quantum key distribution (QKD) protocols.
Quantum Physics
no code implementations • 24 Jun 2015 • Corsin Pfister, Norbert Lütkenhaus, Stephanie Wehner, Patrick J. Coles
Here we show that this assumption is violated for iterative sifting, a sifting procedure that has been employed in some (but not all) of the recently suggested QKD protocols in order to increase their efficiency.
Quantum Physics
no code implementations • 13 May 2011 • David Pitkänen, Xiongfeng Ma, Ricardo Wickert, Peter van Loock, Norbert Lütkenhaus
First we show that one can obtain asymptotically perfect heralding and unit success probability with growing resources.
Quantum Physics