Daniel Grumiller
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View article: Postcarrollian gravity
Postcarrollian gravity Open
We construct postcarrollian gravity models in two, three, and four spacetime dimensions by applying algebraic expansion methods. As a byproduct, we present the most general postcarrollian 2d dilaton gravity model, construct its solutions a…
View article: Boundary Carrollian Conformal Field Theories and Open Null Strings
Boundary Carrollian Conformal Field Theories and Open Null Strings Open
We consider Carrollian conformal field theories in two dimensions and construct the boundary Carrollian conformal algebra (BCCA), opening up innumerable possibilities for further studies, given the growing relevance of Carrollian symmetrie…
View article: Tantum gravity
Tantum gravity Open
We argue there is an interesting triple-scaling limit of quantum gravity, namely when Planck’s constant scales to infinity while Newton’s constant and the speed of light tend to zero, keeping fixed the gravitational coupling GNc−4 and the …
View article: Tantum Gravity
Tantum Gravity Open
We argue there is an interesting triple-scaling limit of quantum gravity, namely when Planck's constant scales to infinity while Newton's constant and the speed of light tend to zero, keeping fixed the gravitational coupling $G_N\,c^{-4}$ …
View article: Carroll dilaton supergravity in two dimensions
Carroll dilaton supergravity in two dimensions Open
A bstract We construct and discuss generic $$ \mathcal{N} $$ = 1 and $$ \mathcal{N} $$ = 2 Carroll dilaton supergravity in two dimensions. We apply our general results to the supersymmetric Carroll-Jackiw-Teitelboim model, including a …
View article: Angle of Null Energy Condition Lines in Critical Spacetimes
Angle of Null Energy Condition Lines in Critical Spacetimes Open
We identify a new critical parameter in Choptuik's gravitational collapse: the angle at which null energy condition (NEC) saturation lines intersect at the center of the critical spacetime. These NEC lines coincide with regions of vanishin…
View article: Carroll dilaton supergravity in two dimensions
Carroll dilaton supergravity in two dimensions Open
We construct and discuss generic N=1 and N=2 Carroll dilaton supergravity in two dimensions. We apply our general results to the supersymmetric Carroll-Jackiw-Teitelboim model, including a discussion of specific boundary conditions. For N=…
View article: Boundary Carrollian CFTs and Open Null Strings
Boundary Carrollian CFTs and Open Null Strings Open
We consider Carrollian conformal field theories in two dimensions and construct the boundary Carrollian conformal algebra (BCCA), opening up innumerable possibilities for further studies, given the growing relevance of Carrollian symmetrie…
View article: Carroll-Hawking effect
Carroll-Hawking effect Open
Carroll black holes with an associated Carroll temperature were introduced recently. So far, it is unclear if they exhibit a Hawking-like effect. To solve this, we study scalar fields on Carroll black hole backgrounds. Inspired by anomaly …
View article: Carroll-invariant propagating fields
Carroll-invariant propagating fields Open
We construct Carroll-invariant theories with fields propagating outside the Carroll light cone, i.e., at a speed strictly greater than zero (“Carroll swiftons”). We first consider models in flat Carroll spacetime in general dimensions, whe…
View article: Carroll swiftons
Carroll swiftons Open
We construct Carroll-invariant theories with fields propagating outside the Carroll lightcone, i.e., at a speed strictly greater than zero (`Carroll swiftons'). We first consider models in flat Carroll spacetime in general dimensions, wher…
View article: One-loop partition function of gravity with leaky boundary conditions
One-loop partition function of gravity with leaky boundary conditions Open
A bstract Leaky boundary conditions in asymptotically AdS spacetimes are relevant to discuss black hole evaporation and the evolution of the Page curve via the island formula. We explore the consequences of leaky boundary conditions on the…
View article: Logarithmic celestial conformal field theory
Logarithmic celestial conformal field theory Open
We argue that the celestial conformal field theory exhibits patterns of a logarithmic conformal field theory. We uncover a Jordan block structure involving the celestial stress tensor and its logarithmic partner, a composite operator built…
View article: Disorder in AdS$_3$/CFT$_2$
Disorder in AdS$_3$/CFT$_2$ Open
We perturbatively study marginally relevant quenched disorder in AdS _3 /CFT _2 to second order in the disorder strength. Using the Chern-Simons formulation of AdS _3 gravity for the Poincaré patch, we introduce disorder via the c…
View article: Carroll black holes
Carroll black holes Open
Despite the absence of a lightcone structure, some solutions of Carroll gravity show black hole-like behaviour. We define Carroll black holes as solutions of Carroll gravity that exhibit Carroll thermal properties and have a Carroll extrem…
View article: One-loop partition function of gravity with leaky boundary conditions
One-loop partition function of gravity with leaky boundary conditions Open
Leaky boundary conditions in asymptotically AdS spacetimes are relevant to discuss black hole evaporation and the evolution of the Page curve via the island formula. We explore the consequences of leaky boundary conditions on the one-loop …
View article: Horizon strings as 3D black hole microstates
Horizon strings as 3D black hole microstates Open
We propose that 3d black holes are an ensemble of tensionless null string states. These microstates typically have non-zero winding. We evaluate their partition function in the limit of large excitation numbers and show that their combinat…
View article: Carroll geodesics
Carroll geodesics Open
Using effective field theory methods, we derive the Carrollian analog of the geodesic action. We find that it contains both `electric' and `magnetic' contributions that are in general coupled to each other. The equations of motion descendi…
View article: Report on 2204.00596v6
Report on 2204.00596v6 Open
We perturbatively study marginally relevant quenched disorder in AdS 3 /CFT 2 to second order in the disorder strength.Using the Chern-Simons formulation of AdS 3 gravity for the Poincaré patch, we introduce disorder via the chemical poten…
View article: Report on 2308.10947v1
Report on 2308.10947v1 Open
Despite the absence of a lightcone structure, some solutions of Carroll gravity show black hole-like behaviour.We define Carroll black holes as solutions of Carroll gravity that exhibit Carroll thermal properties and have a Carroll extrema…
View article: Report on 2308.10947v1
Report on 2308.10947v1 Open
Despite the absence of a lightcone structure, some solutions of Carroll gravity show black hole-like behaviour.We define Carroll black holes as solutions of Carroll gravity that exhibit Carroll thermal properties and have a Carroll extrema…
View article: Report on scipost_202308_00041v1
Report on scipost_202308_00041v1 Open
We propose that 3d black holes are an ensemble of tensionless null string states.These microstates typically have non-zero winding.We evaluate their partition function in the limit of large excitation numbers and show that their combinator…
View article: Report on scipost_202308_00041v1
Report on scipost_202308_00041v1 Open
We propose that 3d black holes are an ensemble of tensionless null string states.These microstates typically have non-zero winding.We evaluate their partition function in the limit of large excitation numbers and show that their combinator…
View article: Carrollian c-functions and flat space holographic RG flows in BMS3/CCFT2
Carrollian c-functions and flat space holographic RG flows in BMS3/CCFT2 Open
We discuss c-functions and their holographic counterpart for two-dimensional field theories with Carrollian conformal fixed points in the UV and the IR. Specifically, we construct asymptotically flat domain wall solutions of three-dimensio…
View article: Carroll black holes
Carroll black holes Open
Despite the absence of a lightcone structure, some solutions of Carroll gravity show black hole-like behaviour. We define Carroll black holes as solutions of Carroll gravity that exhibit Carroll thermal properties and have a Carroll extrem…
View article: Equivalences between 2D dilaton gravities, their asymptotic symmetries, and their holographic duals
Equivalences between 2D dilaton gravities, their asymptotic symmetries, and their holographic duals Open
A bstract Dilaton gravities in two dimensions can be formulated as particular Poisson sigma models. Target space diffeomorphisms map different models to each other and establish a one-to-one correspondence between their classical solutions…
View article: Logarithmic Celestial Conformal Field Theory
Logarithmic Celestial Conformal Field Theory Open
We argue that the celestial conformal field theory exhibits patterns of a logarithmic conformal field theory. We uncover a Jordan block structure involving the celestial stress tensor and its logarithmic partner, a composite operator built…
View article: Equivalences between 2D dilaton gravities, their asymptotic symmetries, and their holographic duals
Equivalences between 2D dilaton gravities, their asymptotic symmetries, and their holographic duals Open
Dilaton gravities in two dimensions can be formulated as particular Poisson sigma models. Target space diffeomorphisms map different models to each other and establish a one-to-one correspondence between their classical solutions. We obtai…