148 citations · 431 across the 18 of their papers we have counts for
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Fluids on null hypersurfaces and Carrollian hydrodynamics
Emil Have
We study intrinsic ideal fluids on null hypersurfaces and their realisations by causal fluids living in the ambient spacetime. An embedded null hypersurface is equipped with an ind…
The Energy-Momentum-News Complex near Future Null Infinity
Jelle Hartong, Emil Have, Vijay Nenmeli +1
We study asymptotically flat vacuum solutions of general relativity in three and four dimensions, with an emphasis on the geometric structures that emerge near null infinity. We co…
Null fluid/gravity correspondence
Jay Armas, Emil Have, Gianbattista-Piero Nicosia
We construct a new class of perturbative asymptotically Anti-de Sitter pp-wave spacetimes by performing a long-wavelength expansion of Kaigorodov metrics in arbitrary spacetime dim…
Null matter and the ultrarelativistic origin of hydrodynamics at zero temperature
Jay Armas, Emil Have, Gianbattista-Piero Nicosia
We uncover a universal sector of relativistic fluid dynamics by taking a novel ultrarelativistic limit in which the temperature tends to zero while the flow simultaneously approach…
Quantum carrollian bosonic strings
José Figueroa-O'Farrill, Emil Have, Niels A. Obers
We study a recently discovered carrollian bosonic string, described classically by a sigma model where both the worldsheet and the target spacetime are carrollian. After fixing the…
Boundary Energy-Momentum Tensors for Asymptotically Flat Spacetimes
Jelle Hartong, Emil Have, Vijay Nenmeli +1
We consider 3D and 4D asymptotically flat spacetimes near future null infinity endowed with the most general allowed Carroll geometry. We define a boundary energy-momentum tensor b…
Strings near black holes are Carrollian -- Part II
Arjun Bagchi, Aritra Banerjee, Jelle Hartong +2
We study classical closed bosonic strings probing the near-horizon region of a non-extremal black hole and show that this corresponds to understanding string theory in the Carroll…
Non-relativistic expansion of open strings and D-branes
Jelle Hartong, Emil Have
We expand the relativistic open bosonic string in powers of where is the speed of light. We perform this expansion to next-to-leading order in and relate our re…
Massive carrollian fields at timelike infinity
Emil Have, Kevin Nguyen, Stefan Prohazka +1
Motivated by flat space holography, we demonstrate that massive spin- fields in Minkowski space near timelike infinity are massive carrollian fields on the carrollian counterpar…
Strings near black holes are Carrollian
Arjun Bagchi, Aritra Banerjee, Jelle Hartong +3
We demonstrate that strings near the horizon of a Schwarzschild black hole, when viewed by a stationary observer at infinity, probe a string Carroll geometry, where the effective l…
Carrollian fluids and spontaneous breaking of boost symmetry
Jay Armas, Emil Have
In the hydrodynamic regime, field theories typically have their boost symmetry spontaneously broken due to the presence of a thermal rest frame although the associated Goldstone fi…
Ideal fracton superfluids
Jay Armas, Emil Have
We investigate the thermodynamics of equilibrium thermal states and their near-equilibrium dynamics in systems with fractonic symmetries in arbitrary curved space. By explicitly ga…
Nonrelativistic Approximations of Closed Bosonic String Theory
Jelle Hartong, Emil Have
We further develop the string expansion of closed bosonic string theory, where is the speed of light. The expansion will be performed up to and including the next-to-ne…
The gauging procedure and carrollian gravity
José Figueroa-O'Farrill, Emil Have, Stefan Prohazka +1
We discuss a gauging procedure that allows us to construct lagrangians that dictate the dynamics of an underlying Cartan geometry. In a sense to be made precise in the paper, the s…
Carrollian and celestial spaces at infinity
José Figueroa-O'Farrill, Emil Have, Stefan Prohazka +1
We show that the geometry of the asymptotic infinities of Minkowski spacetime (in dimensions) is captured by homogeneous spaces of the Poincaré group: the blow-ups of spatial…
Fractons, dipole symmetries and curved spacetime
Leo Bidussi, Jelle Hartong, Emil Have +2
We study complex scalar theories with dipole symmetry and uncover a no-go theorem that governs the structure of such theories and which, in particular, reveals that a Gaussian theo…
On the Non-Relativistic Expansion of Closed Bosonic Strings
Jelle Hartong, Emil Have
We develop a novel approach to non-relativistic closed bosonic string theory that is based on a string expansion of the relativistic string, where is the speed of light…
Non-Boost Invariant Fluid Dynamics
Jan de Boer, Jelle Hartong, Emil Have +2
We consider uncharged fluids without any boost symmetry on an arbitrary curved background and classify all allowed transport coefficients up to first order in derivatives. We assum…