96 citations · 259 across the 15 of their papers we have counts for
12 papers · 1 filter
Relaxation Time Approximation for a multi-species relativistic gas
Gabriel S. Rocha, Gabriel S. Denicol
We generalize a recent prescription for the relaxation time approximation for the relativistic Boltzmann equation for systems with multiple particle species at finite temperature.…
Modelling stochastic fluctuations in relativistic kinetic theory
Gabriel Soares Rocha, Lorenzo Gavassino, Nicki Mullins
Using the information current, we develop a Lorentz-covariant framework for modeling equilibrium fluctuations in relativistic kinetic theory in the grand-canonical ensemble. The re…
Branch-cut in the shear-stress response function of massless with Boltzmann statistics
Gabriel S. Rocha, Isabella Danhoni, Kevin Ingles +2
Using an analytical result for the eigensystem of the linearized collision term for a classical system of massless scalar particles with quartic self-interactions, we show that the…
Transport coefficients of transient hydrodynamics for the hadron-resonance gas and thermal-mass quasiparticle models
Gabriel S. Rocha, Gabriel S. Denicol
We calculate all transport coefficients of second order transient hydrodynamics in two effective kinetic theory models: a hadron-resonance gas and a quasiparticle model with therma…
Theories of Relativistic Dissipative Fluid Dynamics
Gabriel S. Rocha, David Wagner, Gabriel S. Denicol +2
Relativistic dissipative fluid dynamics finds widespread applications in high-energy nuclear physics and astrophysics. However, formulating a causal and stable theory of relativist…
Hydrodynamic theories for a system of weakly self-interacting classical ultra-relativistic scalar particles: causality and stability
Caio V. P. de Brito, Gabriel S. Rocha, Gabriel S. Denicol
We investigate the causality and stability of three different relativistic dissipative fluid-dynamical formulations emerging from a system of classical, ultra-relativistic scalar p…
Hydrodynamic theories for a system of weakly self-interacting classical ultra-relativistic scalar particles: microscopic derivations and attractors
Gabriel S. Rocha, Caio V. P. de Brito, Gabriel S. Denicol
We derive and investigate several hydrodynamic formalisms that emerge from a system of classical, ultra-relativistic scalar particles self-interacting via a quartic potential. The…
Novel relaxation time approximation: a consistent calculation of transport coefficients with QCD-inspired relaxation times
Gabriel S. Rocha, Gabriel S. Denicol, Maurício N. Ferreira +1
We use a novel formulation of the relaxation time approximation to consistently calculate the bulk and shear viscosity coefficients using QCD-inspired energy-dependent relaxation t…
Perturbative approaches in relativistic kinetic theory and the emergence of first-order hydrodynamics
Gabriel S. Rocha, Gabriel S. Denicol, Jorge Noronha
Hydrodynamics can be formulated in terms of a perturbative series in derivatives of the temperature, chemical potential, and flow velocity around an equilibrium state. Different fo…
Transport coefficients of quasi-particle models within a new relaxation time approximation of the Boltzmann equation
Gabriel S. Rocha, Maurício N. Ferreira, Gabriel S. Denicol +1
We investigate the transport properties of a kinetic theory model that is tuned to describe the thermodynamic properties of QCD at zero chemical potential using a new formulation o…
Transient fluid dynamics with general matching conditions: a first study from the method of moments
Gabriel S. Rocha, Gabriel S. Denicol
Recent works have revealed that matching conditions play a major role on general consistency properties of relativistic fluid dynamics such as causality, stability and wellposednes…
Novel Relaxation Time Approximation to the Relativistic Boltzmann Equation
Gabriel S. Rocha, Gabriel S. Denicol, Jorge Noronha
We show that the widely used relaxation time approximation to the relativistic Boltzmann equation contains basic flaws, being incompatible with microscopic and macroscopic conserva…