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Continuous Variable Quantum Key Distribution: Finite-Key Analysis of Composable Security against Coherent Attacks
Fabian Furrer, Torsten Franz, Mario Berta +4
We provide a security analysis for continuous variable quantum key distribution protocols based on the transmission of squeezed vacuum states measured via homodyne detection. We em…
Decoupling with unitary approximate two-designs
Oleg Szehr, Frédéric Dupuis, Marco Tomamichel +1
Consider a bipartite system, of which one subsystem, A, undergoes a physical evolution separated from the other subsystem, R. One may ask under which conditions this evolution dest…
The Link between Entropic Uncertainty and Nonlocality
Marco Tomamichel, Esther Hänggi
Two of the most intriguing features of quantum physics are the uncertainty principle and the occurrence of nonlocal correlations. The uncertainty principle states that there exist…
Impossibility of Growing Quantum Bit Commitments
Severin Winkler, Marco Tomamichel, Stefan Hengl +1
Quantum key distribution (QKD) is often, more correctly, called key growing. Given a short key as a seed, QKD enables two parties, connected by an insecure quantum channel, to gene…
Tight Finite-Key Analysis for Quantum Cryptography
Marco Tomamichel, Charles Ci Wen Lim, Nicolas Gisin +1
Despite enormous progress both in theoretical and experimental quantum cryptography, the security of most current implementations of quantum key distribution is still not establish…