495 citations · 6.2k across the 133 of their papers we have counts for
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Black holes in the conical ensemble
Daniel Grumiller, Robert McNees, Simone Zonetti
We consider black holes in an "unsuitable box": a finite cavity coupled to a thermal reservoir at a temperature different than the black hole's Hawking temperature. These black hol…
Lower bound on the spectral dimension near a black hole
S. Carlip, D. Grumiller
We consider an evaporating Schwarzschild black hole in a framework in which the spectral dimension of spacetime varies continuously from four at large distances to a number smaller…
Dirichlet boundary value problem for Chern-Simons modified gravity
D. Grumiller, R. Mann, R. McNees
Chern-Simons modified gravity comprises the Einstein-Hilbert action and a higher-derivative interaction containing the Chern-Pontryagin density. We derive the analog of the Gibbons…
Liouville gravity from Einstein gravity
D. Grumiller, R. Jackiw
We show that Liouville gravity arises as the limit of pure Einstein gravity in 2+epsilon dimensions as epsilon goes to zero, provided Newton's constant scales with epsilon. Our pro…
How do Black Holes Spin in Chern-Simons Modified Gravity?
Daniel Grumiller, Nicolas Yunes
No Kerr-like exact solution has yet been found in Chern-Simons modified gravity. Intrigued by this absence, we study stationary and axisymmetric metrics that could represent the ex…
Ruppeiner theory of black hole thermodynamics
Jan E Aman, James Bedford, Daniel Grumiller +2
The Ruppeiner metric as determined by the Hessian of the Gibbs surface provides a geometric description of thermodynamic systems in equilibrium. An interesting example is a black h…
Killing horizons kill horizon degrees
L. Bergamin, D. Grumiller
Frequently it is argued that the microstates responsible for the Bekenstein-Hawking entropy should arise from some physical degrees of freedom located near or on the black hole hor…
The Volume of 2D Black Holes
Daniel Grumiller
It is shown that the definition for the volume of stationary black holes advocated in hep-th/0508108 readily generalizes to the case of dilaton gravity in D=2. The dilaton field is…
The Spherically Symmetric Standard Model with Gravity
Herbert Balasin, Christian G. Boehmer, Daniel Grumiller
Spherical reduction of generic four-dimensional theories is revisited. Three different notions of "spherical symmetry" are defined. The following sectors are investigated: Einstein…
Deformations of the Schwarzschild Black Hole
D. Grumiller
Due to its large number of symmetries the Schwarzschild Black Hole can be described by a specific two-dimensional dilaton gravity model. After reviewing classical, semi-classical a…
How to approach Quantum Gravity - Background independence in 1+1 dimensions
D. Grumiller, W. Kummer
The application of quantum theory to gravity is beset with many technical and conceptual problems. After a short tour d'horizon of recent attempts to master those problems by the i…
Long time black hole evaporation with bounded Hawking flux
D. Grumiller
The long time behavior of an evaporating Schwarzschild black hole is studied exploiting that it can be described by an effective theory in 2D, a particular dilaton gravity model. A…
Virtual black hole phenomenology from 2d dilaton theories
Daniel Grumiller
Equipped with the tools of (spherically reduced) dilaton gravity in first order formulation and with the results for the lowest order S-matrix for s-wave gravitational scattering (…
S-matrix for s-wave gravitational scattering
P. Fischer, D. Grumiller, W. Kummer +1
In the s-wave approximation the 4D Einstein gravity with scalar fields can be reduced to an effective 2D dilaton gravity coupled nonminimally to the matter fields. We study the lea…
Quantum Dilaton Gravity in Two Dimensions with Matter
D. Grumiller
In this thesis special emphasis is put on the quantization of the spherically reduced Einstein-massless-Klein-Gordon model using a first order approach for geometric quantities, be…
Two-Dilaton Theories in Two Dimensions from Dimensional Reduction
D. Grumiller, D. Hofmann, W. Kummer
Dimensional reduction of generalized gravity theories or string theories generically yields dilaton fields in the lower-dimensional effective theory. Thus at the level of D=4 theor…
Absolute conservation law for black holes
D. Grumiller, W. Kummer
In all 2d theories of gravity a conservation law connects the (space-time dependent) mass aspect function at all times and all radii with an integral of the matter fields. It depen…