Squashing model for detectors and applications to quantum key distribution protocols
Quantum Physics
2014-01-29 v1 Cryptography and Security
Information Theory
math.IT
Abstract
We develop a framework that allows a description of measurements in Hilbert spaces that are smaller than their natural representation. This description, which we call a "squashing model", consists of a squashing map that maps the input states of the measurement from the original Hilbert space to the smaller one, followed by a targeted prescribed measurement on the smaller Hilbert space. This framework has applications in quantum key distribution, but also in other cryptographic tasks, as it greatly simplifies the theoretical analysis under adversarial conditions.
Keywords
Cite
@article{arxiv.1310.5059,
title = {Squashing model for detectors and applications to quantum key distribution protocols},
author = {Oleg Gittsovich and Normand J. Beaudry and Varun Narasimhachar and Ruben Romero Alvarez and Tobias Moroder and Norbert Lütkenhaus},
journal= {arXiv preprint arXiv:1310.5059},
year = {2014}
}
Comments
24 pages main text, 12 figures, 4 pages appendix, 1 figure