50 citations · 459 across the 37 of their papers we have counts for
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Interplay of topology and geometry in frustrated 2d Heisenberg magnets
N. Hasselmann, A. Sinner
We investigate two-dimensional frustrated Heisenberg magnets using non-perturbative renormalization group techniques. These magnets allow for point-like topological defects which a…
Functional renormalization group in the broken symmetry phase: momentum dependence and two-parameter scaling of the self-energy
Andreas Sinner, Nils Hasselmann, Peter Kopietz
We include spontaneous symmetry breaking into the functional renormalization group (RG) equations for the irreducible vertices of Ginzburg-Landau theories by augmenting these equat…
Two-parameter scaling of correlation functions near continuous phase transitions
Nils Hasselmann, Andreas Sinner, Peter Kopietz
We discuss the order parameter correlation function in the vicinity of continuous phase transitions using a two-parameter scaling form G(k) = k_c^{-2} g(kξ,k/k_c), where k is the w…
Landau functions for non-interacting bosons
Andreas Sinner, Florian Schuetz, Peter Kopietz
We discuss the statistics of Bose-Einstein condensation (BEC) in a canonical ensemble of N non-interacting bosons in terms of a Landau function L_N^{BEC} (q) defined by the logarit…