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Non-linear black hole dynamics and Carrollian fluids
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The dynamics of black hole horizons has recently been linked to that of Carrollian fluids. This results in a dictionary between geometrical quantities and those of a fluid with unusual properties due its underlying Carrollian symmetries. In this work we explore this relation in dynamical settings with the interest of shedding light on either side by relevant observations. In particular: we discuss how the null surface where the Carrollian fluid evolves is affected by its behavior; that the fluid's equilibration properties are tied to teleological considerations; the connection of higher derivative contributions as both source of energy and dissipation for the fluid and the non-linear behavior of black holes. This latter point, connects with discussions of non-linear modes in the relaxation to equilibrium of perturbed black holes.
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Cited by 5 Pith papers
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Carrollian limit of NS-NS and Heterotic Supergravity
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Gravitational Memory Beyond Null Infinity through Finite-Distance Carrollian Screens
Finite-distance null screens carry a Carrollian memory whose leading tracefree large-radius part reproduces the standard Bondi displacement memory in Robinson–Trautman spacetimes.
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Postcarrollian gravity
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Gravitational Enstrophy: Local Geometric Origin and Inverse-Cascade Constraints
The squared magnetic Weyl tensor behaves as an approximately conserved gravitational enstrophy, giving a Fjørtoft-type constraint that pushes nonlinear gravitational-wave energy toward lower frequencies in near-extrem...
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Carrollian bosonic supergravity at order $\alpha'$ and the universal cancellation of higher-curvature divergences
Four-derivative and higher pure-gravitational α' corrections to bosonic supergravity admit a finite Carrollian limit, with an explicit action and a universal finiteness criterion for Riem^N terms.
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