Directed bond percolation process is an important model in statistical physics. It provides a paramount example of non-equilibrium phase transitions. By now its universal properties are known only up to the second-order of the perturbation theory. Here, our aim is to put forward a numerical technique with anomalous dimensions of directed percolation to the higher orders of perturbation theory. It is based on the perturbative renormalization scheme in deviation from the upper critical dimension, ϵ = 4-d. Universal quantities are expressed in terms of irreducible renormalized Feynman diagrams and there is no need for calculation of renormalization constants. A numerical evaluation of integrals has been performed using the Vegas algorithm from the Cuba library. Whitin the framework, the anomalous dimensions are computed up to three-loop order in ϵ.

Original languageEnglish
Pages41-58
Number of pages18
StatePublished - 2017
Event10th International Conference on Chaotic Modeling and Simulation, CHAOS 2017 - Barcelona, Spain
Duration: 30 May 20172 Jun 2017

Conference

Conference10th International Conference on Chaotic Modeling and Simulation, CHAOS 2017
Country/TerritorySpain
CityBarcelona
Period30/05/172/06/17

    Scopus subject areas

  • Modelling and Simulation

    Research areas

  • Directed bond percolation, Multi-dimensional integration, Non-equilibrium phase transition, The renormalization group

ID: 73725845