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51 papers · 1 filter
Multiplicativity in the theory of coincidence site lattices
Peter Zeiner
Coincidence Site Lattices (CSLs) are a well established tool in the theory of grain boundaries. For several lattices up to dimension , the CSLs are known explicitly as well as…
Polytopes associated to Dihedral Groups
Barbara Baumeister, Christian Haase, Benjamin Nill +1
In this note we investigate the convex hull of those -permutation matrices that correspond to symmetries of a regular -gon. We give the complete facet description. A…
The Grothendieck ring of the structure group of the geometric Frobenius morphism
Markus Severitt
The geometric Frobenius morphism on smooth varieties is an fppf-fiber bundle. We study representations of the structure group scheme. In particular, we describe irreducible represe…
Equilibration of Isolated Macroscopic Quantum Systems under Experimentally Realistic Conditions
Peter Reimann
In how far does an non-equilibrium initial ensemble evolve towards a stationary long time behavior for an isolated macroscopic quantum system? We demonstrate that deviations from a…
GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi
Markus Meinert, Christoph Friedrich, Günter Reiss +1
Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi Heusler compounds have been calculated within the one-shot GW approximation in an all-electron framework with…
New developments in PJFry
Jochem Fleischer, Tord Riemann, Valery Yundin
We report on recent progress in numerical evaluation of one loop tensor integrals. A public C++ package PJFry implementing algorithms from arXiv:1009.4436 and its extension to hexa…