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- Joint Institute for Nuclear ResearchRU47 papers
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13 papers · 1 filter
Bayesian Approach to Inverse Quantum Statistics: Reconstruction of Potentials in the Feynman Path Integral Representation of Quantum Theory
J. C. Lemm, J. Uhlig, A. Weiguny
The Feynman path integral representation of quantum theory is used in a non--parametric Bayesian approach to determine quantum potentials from measurements on a canonical ensemble.…
L^2-Betti Numbers of Discrete Measured Groupoids
Roman Sauer
There are notions of L^2-Betti numbers for discrete groups (Cheeger-Gromov, Lueck), for type II_1-factors (recent work of Connes-Shlyakhtenko) and for countable standard equivalenc…
Homological Invariants and Quasi-Isometry
Roman Sauer
Building upon work of Y. Shalom we give a homological-algebra flavored definition of an induction map in group homology associated to a topological coupling. As an application we o…
On topologically finite-dimensional simple C*-algebras
Wilhelm Winter
We show that, if a simple -algebra is topologically finite-dimensional in a suitable sense, then not only has certain good properties, but is even accessi…
Inverting the spherical Radon transform for physically meaningful functions
Jens Klein
In this paper we refer to the reconstruction formulas given in L.-E. Andersson's On the determination of a function from spherical averages, which are often used in applications su…
Solitonic lattices in photorefractive crystals
M. Petrovic, D. Traeger, A. Strinic +3
Two-dimensional spatial solitonic lattices are generated and investigated experimentally and numerically in an SBN:Ce crystal. An enhanced stability of these lattices is achieved b…