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- Daniel Grumiller
- 2008

We demonstrate that cosmological topologically massive gravity at the chiral point exhibits a negative energy bulk mode that grows linearly in time. Unless there are physical reasons to discard thisâ€¦ (More)

- Daniel Grumiller, WienAustriaW. Kummer, D. V. Vassilevich
- 2002

The study of general two dimensional models of gravity allows to tackle basic questions of quantum gravity, bypassing important technical complications which make the treatment in higher dimensionsâ€¦ (More)

- Daniel Grumiller, Roman Jackiw, D V Ahluwalia-Khalilova

Kaluza-Klein reduction of conformally flat spaces is considered for arbitrary dimensions. The corresponding equations are particularly elegant for the reduction from four to three dimensions.â€¦ (More)

- Luzi Bergamin, Daniel Grumiller, WienAustriaW. Kummer, D. V. Vassilevich
- 2005

Requiring the presence of a horizon imposes constraints on the physical phase space. After a careful analysis of dilaton gravity in 2D with boundaries (including the Schwarzschild and Witten blackâ€¦ (More)

- Daniel Grumiller
- 2008

We consider two ultrarelativistic shock waves propagating and colliding in fivedimensional Anti-de-Sitter spacetime. By transforming to Rosen coordinates, we are able to find the form of the metricâ€¦ (More)

We show that cosmological topologically massive gravity at the chiral point allows not only Brownâ€“Henneaux boundary conditions as consistent boundary conditions, but slightly more general ones whichâ€¦ (More)

- Daniel Grumiller, WienAustriaW. Kummer, D. V. Vassilevich
- 2002

The virtual black hole phenomenon, which has been observed previously in specific models, is established for generic 2D dilaton gravity theories with scalar matter. The ensuing effective line elementâ€¦ (More)

- Daniel Grumiller
- 2007

A comprehensive treatment of black hole thermodynamics in two-dimensional dilaton gravity is presented. We derive an improved action for these theories and construct the Euclidean path integral. Anâ€¦ (More)

A non-technical overview on gravity in two dimensions is provided. Applications discussed in this work comprise 2D type 0A/0B string theory, Black Hole evaporation/thermodynamics, toy models forâ€¦ (More)

- H. Balasin, Daniel Grumiller
- 2003

The ultrarelativistic limit of twodimensional dilaton gravity is presented and its associated (anti-)selfdual energy momentum tensor is derived. It is localized on a null line, although the lineâ€¦ (More)