H
Hans-Karl Janssen
Researcher at University of Düsseldorf
Publications - 101
Citations - 3141
Hans-Karl Janssen is an academic researcher from University of Düsseldorf. The author has contributed to research in topics: Critical exponent & Directed percolation. The author has an hindex of 22, co-authored 101 publications receiving 2946 citations.
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On a Lagrangean for classical field dynamics and renormalization group calculations of dynamical critical properties
TL;DR: In this paper, a Lagrangean for nonlinear stochastic processes is derived from the path probability density for classical field dynamics, which provides a convenient approach to the mode coupling equations and the renormalization group theory of critical dynamics.
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New universal short-time scaling behaviour of critical relaxation processes
TL;DR: In this article, the authors studied the critical relaxation properties of model A (purely dissipative relaxation) starting from a macroscopically prepared initial state characterised by non-equilibrium values for order parameter and correlations.
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Renormalized field theory of critical dynamics
TL;DR: In this paper, a Gell'Mann-low-type renormalization group approach to the critical dynamics of stochastic models described by Langevin or Fokker-Planck equations including mode-coupling terms is proposed.
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The field theory approach to percolation processes
Hans-Karl Janssen,Uwe C. Täuber +1 more
TL;DR: In this paper, a field theory approach to percolation processes is presented, focusing on simple and general epidemic processes that display continuous non-equilibrium active to absorbing state phase transitions whose asymptotic features are governed by the directed (DP) and dynamic (dIP) universality classes.
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Lévy-flight spreading of epidemic processes leading to percolating clusters
TL;DR: It is shown that the long-range critical behavior changes continuously to its short-range counterpart for a decay exponent of the infection, which is the probability distribution decaying in d dimensions with the distance as .