3.7k citations · 10.3k across the 83 of their papers we have counts for
8 papers · 1 filter
Quantum key distribution secure against the efficiency loophole
Xiongfeng Ma, Tobias Moroder, Norbert Lütkenhaus
An efficiency-loophole-free quantum key distribution (QKD) scheme is proposed, which involves no hardware change but a modification in the data post-processing step. The scheme app…
Spectrum conditions for symmetric extendible states
Geir Ove Myhr, Norbert Lütkenhaus
We analyze bipartite quantum states that admit a symmetric extension. Any such state can be decomposed into a convex combination of states that allow a _pure_ symmetric extension.…
Symmetric extension in two-way quantum key distribution
Geir Ove Myhr, Joseph M. Renes, Andrew C. Doherty +1
We introduce symmetric extensions of bipartite quantum states as a tool for analyzing protocols that distill secret key from quantum correlations. Whether the correlations are comi…
Security of Binary Modulated Continuous Variable Quantum Key Distribution under Collective Attacks
Yi-Bo Zhao, Matthias Heid, Johannes Rigas +1
We give an achievable secret key rate of a binary modulated continuous variable quantum key distribution schemes in the collective attack scenario considering quantum channels that…
Space-QUEST: Experiments with quantum entanglement in space
Rupert Ursin, Thomas Jennewein, Johannes Kofler +36
The European Space Agency (ESA) has supported a range of studies in the field of quantum physics and quantum information science in space for several years, and consequently we hav…
Comment on "Arbitrated quantum-signature scheme"
Marcos Curty, Norbert Lütkenhaus
We investigate the quantum signature scheme proposed by Zeng and Keitel [Phys. Rev. A 65, 042312 (2002)]. It uses Greenberger-Horne-Zeilinger (GHZ) states and the availability of a…
Iterations of nonlinear entanglement witnesses
Tobias Moroder, Otfried Gühne, Norbert Lütkenhaus
We describe a generic way to improve a given linear entanglement witness by a quadratic, nonlinear term. This method can be iterated, leading to a whole sequence of nonlinear witne…
The Security of Practical Quantum Key Distribution
Valerio Scarani, Helle Bechmann-Pasquinucci, Nicolas J. Cerf +3
Quantum key distribution (QKD) is the first quantum information task to reach the level of mature technology, already fit for commercialization. It aims at the creation of a secret…