495 citations · 6.2k across the 133 of their papers we have counts for
107 papers · 1 filter
Unitary quantum conformal Bondi-Metzner-Sachs field theories
Daniel Grumiller, Iva Lovrekovic
We impose unitarity constraints on two-dimensional field theories whose symmetries form the quantum conformal Bondi-Metzner-Sachs algebra, which combines conformal symmetries with…
Universal sectors of two-dimensional Carrollian CFTs
Ankit Aggarwal, Arjun Bagchi, Stephane Detournay +3
We revisit modular invariance in two-dimensional Carrollian conformal field theories from a geometric perspective. Focusing on the characters of the induced and highest-weight repr…
Boundary Carrollian CFTs and Open Null Strings
Arjun Bagchi, Pronoy Chakraborty, Shankhadeep Chakrabortty +3
We consider Carrollian conformal field theories in two dimensions and construct the boundary Carrollian conformal algebra (BCCA), opening up innumerable possibilities for further s…
One-loop partition function of gravity with leaky boundary conditions
Daniel Grumiller, Romain Ruzziconi, Céline Zwikel
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…
Carrollian c-functions and flat space holographic RG flows in BMS3/CCFT2
Daniel Grumiller, Max Riegler
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…
Carroll black holes
Florian Ecker, Daniel Grumiller, Jelle Hartong +3
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 e…
Logarithmic Celestial Conformal Field Theory
Adrien Fiorucci, Daniel Grumiller, Romain Ruzziconi
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 ten…
Equivalences between 2D dilaton gravities, their asymptotic symmetries, and their holographic duals
Florian Ecker, Daniel Grumiller, Carlos Valcárcel +1
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…
Horizon Strings as 3d Black Hole Microstates
Arjun Bagchi, Daniel Grumiller, M. M. Sheikh-Jabbari
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 lim…
Disorder in AdS/CFT
Moritz Dorband, Daniel Grumiller, René Meyer +1
We perturbatively study marginally relevant quenched disorder in AdS/CFT to second order in the disorder strength. Using the Chern-Simons formulation of AdS gravity for…
Minkowski and (A)dS ground states in general 2d dilaton gravity
Daniel Grumiller, Martin Laihartinger, Romain Ruzziconi
We reorganize the derivative expansion of general (power-counting non-renormalizable) 2d dilaton gravity such that the mass function is integrable. As an example, we consider a thr…
dS as excitation of AdS
Florian Ecker, Daniel Grumiller, Robert McNees
We introduce a family of 2D dilaton gravity models with state-dependent constant curvature so that dS emerges as an excitation of AdS. Curiously, the strong coupling region…
Carrollian superconformal theories and super BMS
Arjun Bagchi, Daniel Grumiller, Poulami Nandi
We investigate the supersymmetric versions of Bondi-Metzner-Sachs or, equivalently, conformal Carroll symmetry in boundary dimensions , with applications of flat space hologra…
Null boundary phase space: slicings, news and memory
H. Adami, D. Grumiller, M. M. Sheikh-Jabbari +3
We construct the boundary phase space in -dimensional Einstein gravity with a generic given co-dimension one null surface as the boundary. The associated boundary sym…
Generalized dilaton gravity in 2d
Daniel Grumiller, Romain Ruzziconi, Céline Zwikel
Generalized dilaton gravity in 2d is the most general consistent deformation of the Jackiw-Teitelboim model that maintains local Lorentz invariance. The action is generically not p…
Non-Lorentzian Chaos and Cosmological Holography
Arjun Bagchi, Shankhadeep Chakrabortty, Daniel Grumiller +3
We study chaos in non-Lorentzian field theories, specifically Galilean and Carrollian conformal field theories in two dimensions. In a large central charge limit, we find that the…
Limits of JT gravity
Daniel Grumiller, Jelle Hartong, Stefan Prohazka +1
We construct various limits of JT gravity, including Newton-Cartan and Carrollian versions of dilaton gravity in two dimensions as well as a theory on the three-dimensional light c…
QNEC2 in deformed holographic CFTs
C. Ecker, D. Grumiller, H. Soltanpanahi +1
We use the quantum null energy condition in strongly coupled two-dimensional field theories (QNEC2) as diagnostic tool to study a variety of phase structures, including crossover,…
Universal flow equations and chaos bound saturation in 2d dilaton gravity
Daniel Grumiller, Robert McNees
We show that several features of the Jackiw-Teitelboim model are in fact universal properties of two-dimensional Maxwell-dilaton gravity theories with a broad class of asymptotics.…
Uniformization of Entanglement Entropy in Holographic Warped Conformal Field Theories
Stéphane Detournay, Daniel Grumiller, Max Riegler +1
Using a uniformization map we determine the holographic entanglement entropy for states of a Warped Conformal Field Theory dual to a generic vacuum metric in AdS gravity with C…
Horizons 2020
D. Grumiller, M. M. Sheikh-Jabbari, C. Zwikel
Horizons of black holes or cosmologies are peculiar loci of spacetime where interesting physical effects takes place, some of which are probed by recent (EHT and LIGO) and future e…
T-Witts from the horizon
H. Adami, D. Grumiller, S. Sadeghian +2
Expanding around null hypersurfaces, such as generic Kerr black hole horizons, using co-rotating Kruskal-Israel-like coordinates we study the associated surface charges, their symm…
Flat space holography and complex SYK
Hamid Afshar, Hernan Gonzalez, Daniel Grumiller +1
We provide the first steps towards a flat space holographic correspondence in two bulk spacetime dimensions. The gravity side is described by a conformally transformed version of t…
Interpolating Between Asymptotic and Near Horizon Symmetries
D. Grumiller, M. M. Sheikh-Jabbari, C. Troessaert +1
We develop basic tools and matching conditions to interpolate between asymptotic and near horizon symmetries. We focus on black holes in three dimensions. In particular, we match B…