A hydrodynamical description of gravitational waves
arXiv:2210.05434 · doi:10.1140/epjc/s10052-022-11160-9
Abstract
It is easy to reason that gravity might be the effect of a fluid in disguise, as it will naturally arise in emergent gravity models where gravity is due to the effect of some fundamental particles, with the latter expected to behave collectively like a fluid at the macroscopic scale. We call this the fluid/gravity equivalence. The key difficulty with the fluid/gravity equivalence is to find the correct metric-fluid relation (the relation between the emergent metric and the fluid properties) so that the fluid not only has physically acceptable properties but also obeys the usual hydrodynamic equations, while at the same time the emergent metric also obeys the Einstein equations. Faced with the problem, we have previously made a tentative proposal of the metric-fluid relation, focusing only on obtaining physically acceptable predictions on the fluid properties. In this paper, however, we find that for the general gravitational wave spacetime near the null infinity, the underlying fluid not only has physically acceptable properties, but also satisfies the expected relativistic hydrodynamic equations in the Minkowski background, thus providing a concrete example satisfying both of the major requirements expected for the fluid/gravity equivalence.
published version
References in corpus (19)
- Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
- Nonlinear Fluid Dynamics from Gravity
- Tests of General Relativity with Binary Black Holes from the second LIGO-Virgo Gravitational-Wave Transient Catalog
- Viscosity, Black Holes, and Quantum Field Theory
- Concepts and status of Chinese space gravitational wave detection projects
- Conformal Nonlinear Fluid Dynamics from Gravity in Arbitrary Dimensions
- The Incompressible Non-Relativistic Navier-Stokes Equation from Gravity
- Entropy density of spacetime and the Navier-Stokes fluid dynamics of null surfaces
- The Incompressible Navier-Stokes Equations From Black Hole Membrane Dynamics
- Conformal Field Theory as Microscopic Dynamics of Incompressible Euler and Navier-Stokes Equations
- A generalized Damour-Navier-Stokes equation applied to trapping horizons
- Hydrodynamics of spacetime and vacuum viscosity
- Non-Relativistic Fluid Dual to Asymptotically AdS Gravity at Finite Cutoff Surface
- Gravity and axions from a random UV QFT
- Flat deformation theorem and symmetries in spacetime
- The not-so-nonlinear nonlinearity of Einstein's equation
- Emergent gravity from hidden sectors and TT deformations
- Generalized Navier-Stokes equations and soft hairy horizons in fluid/gravity correspondence
- Fluid-gravity and membrane-gravity dualities - Comparison at subleading orders