63 citations · 656 across the 40 of their papers we have counts for
40 papers
The initial data of effective field theories of relativistic viscous fluids and gravity
Lorenzo Gavassino, Áron D. Kovács, Harvey S. Reall
There has been recent progress in developing well-posed theories of relativistic viscous hydrodynamics and of gravitational effective field theories. These have in common the featu…
Thermodynamic stability of superflows in General Relativity and Newtonian gravity
Lorenzo Gavassino
Landau's criterion for superfluidity is a special case of a broader principle: A moving fluid cannot be stopped by frictional forces if its state of motion is a local minimum of th…
Perfect spinfluid: A divergence-type approach
Nick Abboud, Lorenzo Gavassino, Rajeev Singh +1
We present a new formulation of non-dissipative relativistic spin hydrodynamics that incorporates spin degrees of freedom into the divergence-type theory framework. Due to the dive…
Noncovariant parabolic theories of relativistic diffusion
Lorenzo Gavassino
A new first-order theory of relativistic dissipation has been recently proposed, where viscous effects are incorporated using the traditional Navier-Stokes framework. Its main nove…
Non-Newtonian corrections to radiative viscosity: Israel-Stewart theory as a viscosity limiter
Lorenzo Gavassino
Radiation is a universal friction-increasing agent. When two fluid layers are in relative motion, the inevitable exchange of radiation between such layers gives rise to an effectiv…
Convergence of the hydrodynamic gradient expansion in relativistic kinetic theory
Lorenzo Gavassino
We rigorously prove that, in any relativistic kinetic theory whose non-hydrodynamic sector has a finite gap, the Taylor series of all hydrodynamic dispersion relations has a finite…
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…
Analytical insights into the interplay of momentum, multiplicity and the speed of sound in heavy-ion collisions
Gabriel Soares Rocha, Lorenzo Gavassino, Mayank Singh +1
We introduce a minimal model of ultracentral heavy-ion collisions to study the relation between the speed of sound of the produced plasma and the final particles' energy and multip…
Gapless non-hydrodynamic modes in relativistic kinetic theory
Lorenzo Gavassino
We provide rigorous criteria to determine whether the non-hydrodynamic sector of a relativistic kinetic theory is gapless. These general criteria apply to both Boltzmann's equation…
Causal and Stable Relativistic Hydrodynamic Fluctuations
Nicki Mullins, Mauricio Hippert, Jorge Noronha +1
When two nuclei collide close to the speed of light, a fluid state known as the quark-gluon plasma is formed. Attempts to understand the dynamics of this fluid have generated signi…
Infinite Order Hydrodynamics: An Analytical Example
Lorenzo Gavassino
We construct a kinetic model for matter-radiation interactions whose hydrodynamic gradient expansion can be computed analytically up to infinite order in derivatives, in the fully…
Consistent inclusion of fluctuations in first-order causal and stable relativistic hydrodynamics
Lorenzo Gavassino, Nicki Mullins, Mauricio Hippert
We construct, for the first time, a Bemfica-Disconzi-Noronha-Kovtun (BDNK) theory for linear stochastic fluctuations, which is proved to be mathematically consistent, causal, and c…
First-order relativistic hydrodynamics with an information current
Lorenzo Gavassino, Nick Abboud, Enrico Speranza +1
We show that it is possible to define a timelike future-directed information current within relativistic first-order hydrodynamics. This constitutes the first step toward a covaria…
A new approach to stochastic relativistic fluid dynamics from information flow
Nicki Mullins, Mauricio Hippert, Lorenzo Gavassino +1
We present a new general formalism for introducing thermal fluctuations in relativistic hydrodynamics, which incorporates recent developments on the causality and stability of rela…
The regime of applicability of Israel-Stewart hydrodynamics
David Wagner, Lorenzo Gavassino
Using analytical tools from linear response theory, we systematically assess the accuracy of several microscopic derivations of Israel-Stewart hydrodynamics near local equilibrium.…
Relativistic hydrodynamic fluctuations from an effective action: causality, stability, and the information current
Nicki Mullins, Mauricio Hippert, Lorenzo Gavassino +1
Causality is necessary for retarded Green's functions to remain retarded in all inertial frames in relativity, which ensures that dissipation of fluctuations is a Lorentz invariant…
Stability of multicomponent Israel-Stewart-Maxwell theory for charge diffusion
Lorenzo Gavassino, Masoud Shokri
We obtain stability criteria for diffusive inviscid multicomponent Israel-Stewart hydrodynamics with and without background or dynamic electromagnetic fields. Our analysis is groun…
Dispersion relations alone cannot guarantee causality
Lorenzo Gavassino, Marcelo M. Disconzi, Jorge Noronha
We show that linear superpositions of plane waves involving a single-valued, covariantly stable dispersion relation always propagate outside the lightcone, unless $ω(k) =a+b…
Relativistic Bulk Rheology: From Neutron Star Mergers to Viscous Cosmology
Lorenzo Gavassino, Jorge Noronha
We develop the first causal and stable theory of a bulk-viscous relativistic pseudoplastic (or dilatant) fluid. This new formalism brings to light the rheological properties of sev…
Relativistic bulk viscous fluids of Burgers type and their presence in neutron stars
Lorenzo Gavassino
It is well known that a mixture of two chemical components undergoing one chemical reaction is a bulk viscous fluid, where the bulk stress evolves according to the Israel-Stewart t…
Universality Classes of Relativistic Fluid Dynamics: Applications
L. Gavassino, M. M. Disconzi, J. Noronha
Using a formalism that was recently developed in a companion paper, we rigorously prove the equivalence, in the linear regime, of a number of apparently different relativistic hydr…
Universality Classes of Relativistic Fluid Dynamics: Foundations
Lorenzo Gavassino, Marcelo M. Disconzi, Jorge Noronha
A general organizing principle is proposed that can be used to derive the equations of motion describing the near-equilibrium dynamics of causal and thermodynamically stable relati…
Is Relativistic Hydrodynamics always Symmetric-Hyperbolic in the Linear Regime?
Lorenzo Gavassino
Close to equilibrium, the kinetic coefficients of a thermodynamic system must satisfy a set of symmetry conditions, which follow from the Onsager-Casimir principle. Here, we show t…
Relativistic Liquids: GENERIC or EIT?
Lorenzo Gavassino, Marco Antonelli
We study the GENERIC hydrodynamic theory for relativistic liquids formulated by Ottinger and collaborators. We use the maximum entropy principle to derive its conditions for linear…