727 citations
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6 papers · 1 filter
On fixing boundary points of transitive hyperbolic graphs
Agelos Georgakopoulos, Matthias Hamann
We show that there is no 1-ended, planar, hyperbolic graph such that the stabilizer of one of its hyperbolic boundary points acts transitively on the vertices of the graph. This gi…
Polaritonic properties of the Jaynes-Cummings lattice model in two dimensions
Michael Knap, Enrico Arrigoni, Wolfgang von der Linden
Light-matter systems allow to realize a strongly correlated phase where photons are present. In these systems strong correlations are achieved by optical nonlinearities, which appe…
Redundancy of minimal weight expansions in Pisot bases
Peter J. Grabner, Wolfgang Steiner
Motivated by multiplication algorithms based on redundant number representations, we study representations of an integer as a sum , where the digits are…
The QCD phase diagram according to the center group
Ydalia Delgado Mercado, Hans Gerd Evertz, Christof Gattringer
We study an effective theory for QCD at finite temperature and density which contains the leading center symmetric and center symmetry breaking terms. The effective theory is studi…
The Wiener maximum quadratic assignment problem
Eranda Çela, Nina S. Schmuck, Shmuel Wimer +1
We investigate a special case of the maximum quadratic assignment problem where one matrix is a product matrix and the other matrix is the distance matrix of a one-dimensional poin…
Case Study of Four Homologous Large-Scale Coronal Waves Observed on 2010 April 28 and 29
I. W. Kienreich, A. M. Veronig, N. Muhr +3
On 2010 April 28 and 29, the Solar TErrestrial Relations Observatory B/Extreme Ultraviolet Imager observed four homologous large-scale coronal waves, the so-called EIT-waves, withi…