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5 papers · 2 filters
Security and Composability of Randomness Expansion from Bell Inequalities
Serge Fehr, Ran Gelles, Christian Schaffner
The nonlocal behavior of quantum mechanics can be used to generate guaranteed fresh randomness from an untrusted device that consists of two nonsignalling components; since the gen…
The Garden-Hose Model
Harry Buhrman, Serge Fehr, Christian Schaffner +1
We define a new model of communication complexity, called the garden-hose model. Informally, the garden-hose complexity of a function f:{0,1}^n x {0,1}^n to {0,1} is given by the m…
An All-But-One Entropic Uncertainty Relation, and Application to Password-based Identification
Niek J. Bouman, Serge Fehr, Carlos González-Guillén +1
Entropic uncertainty relations are quantitative characterizations of Heisenberg's uncertainty principle, which make use of an entropy measure to quantify uncertainty. In quantum cr…
Microtrap arrays on magnetic film atom chips for quantum information science
V. Y. F. Leung, A. Tauschinsky, N. J. van Druten +1
We present two different strategies for developing a quantum information science platform, based on our experimental results with magnetic microtrap arrays on a magnetic-film atom…
Quantized Media with Absorptive Scatterers and Modified Atomic Emission Rates
L. G. Suttorp, A. J. van Wonderen
Modifications in the spontaneous emission rate of an excited atom that are caused by extinction effects in a nearby dielectric medium are analyzed in a quantummechanical model, in…