Fast kinetic simulator for relativistic matter

TL;DR

This paper introduces a new relativistic lattice kinetic scheme capable of efficiently simulating relativistic flows across various regimes, including fluid and rarefied gas, for both massless and massive particles, with potential applications in physics and astrophysics.

Contribution

The paper presents a novel family of relativistic lattice kinetic schemes that unify the simulation of different relativistic regimes and particle types, improving computational efficiency.

Findings

Effective simulation of relativistic flows across multiple regimes

Capability to handle both massless and massive particles

Potential applications in Quark-Gluon Plasma and astrophysics

Abstract

We present a new family of relativistic lattice kinetic schemes for the efficient simulation of relativistic flows in both strongly-interacting (fluid) and weakly-interacting (rarefied gas) regimes. The method can also deal with both massless and massive particles, thereby encompassing ultra-relativistic and mildly-relativistic regimes alike. The computational performance of the method for the simulation of relativistic flows across the aforementioned regimes is discussed in detail, along with prospects of future applications for Quark-Gluon Plasma, electron flows in graphene and systems in astrophysical contexts.