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.

Язык оригиналаанглийский
Страницы41-58
Число страниц18
СостояниеОпубликовано - 2017
Событие10th International Conference on Chaotic Modeling and Simulation, CHAOS 2017 - Barcelona, Испания
Продолжительность: 30 мая 20172 июн 2017

конференция

конференция10th International Conference on Chaotic Modeling and Simulation, CHAOS 2017
Страна/TерриторияИспания
ГородBarcelona
Период30/05/172/06/17

    Предметные области Scopus

  • Моделирование и симуляция

ID: 73725845