This site is frozen as of May 2004 - please visit the Leipzig edition for up-to-date info

Sections of this homepage:

• Scientific Projects
• Current Address
• Papers and eprints
• Talks
• Links

Running Projects

• Nonperturbative aspects of dilaton gravity in 2d (Erwin-Schrödinger Stipendium; since Jan. 04)

Closed Projects

• 2d reduction of generalized Einstein theories (PhD + epsilon) (Jan. 2001 - Dec. 2003)
• 2d quantum gravity (PhD) (Oct. 1998 - Dec. 2000)
• SToponium (Sep. 1997 - Feb. 1998)
• NA 48 experiment at CERN (Jun. 1997 - Aug. 1997)
• Diploma thesis (SToponium) (May 1996 - Feb. 1997)

Running Projects

Nonperturbative aspects of dilaton gravity in 2d (since Jan. 04)

• Student project by you? (preferably if you are located in Leipzig or Vienna to simplify discussions by avoiding excessive exchange of e-mails)
• Published paper (Class.Quant.Grav.) by H. Balasin and D.G. (Jan 04): The ultrarelativistic limit of 2D dilaton gravity and its energy momentum tensor
• Paper by D.G. (Feb 04): Long time Black Hole evaporation with bounded Hawking flux
• Paper by L. Bergamin, D.G. and W. Kummer (Apr 04): Quantization of 2D dilaton supergravity with matter
• Paper by D.G. and D. Mayerhofer (Apr 04): On static solutions in 2D dilaton gravity with scalar matter

Closed Projects

2d reduction of generalized Einstein theories (Jan. 01 - Dec. 03)

• Diploma thesis by W. Waltenberger (Mar. 01): Towards Two-Dimensional Quantum Gravity with Fermions - A Computer Algebra Approach
• Mathematica notepad containing detailed calculations of the scattering amplitude in scalar s-wave scattering (Apr. 01): click here to download!
• Published paper (Phys.Lett. B) by P. Fischer, D.G., W. Kummer and D.V. Vassilevich (May 01): S-matrix for gravitational s-wave scattering
• Diploma thesis by P. Fischer (May 01): Vertices in Spherically Reduced Quantum Gravity (click here for a HTML version!)
• Thesis by D.G. (May 01): Quantum Dilaton Gravity in Two Dimensions with Matter (click here for a (suboptimal) HTML version!)
• Talk given in Leipzig (at the conference "Quantum Field Theory under the Influence of External Conditions", Sep. 01): The virtual black hole in 2d quantum gravity (click here for a (very suboptimal) HTML-version!)
• Proceedings contribution (to the conference "Quantum Field Theory under the Influence of External Conditions"; published in Int.J.Mod.Phys.) by D.G. (Nov 01): The virtual black hole in 2d quantum gravity and its relevance for the S-matrix (click here for a (suboptimal) HTML-version!)
• Published paper (Class.Quant.Grav.) by D.G. (Dec 01): Virtual black hole phenomenology from 2d dilaton theories (click here for a (suboptimal) HTML-version!)
• Published paper (Phys.Rept.) by D.G., W. Kummer and D.V. Vassilevich (Apr 02): Dilaton gravity in two dimensions
• Poster presented at the EURESCO conference "Particle Physics and Gravitation" in Bad Herrenalb, Germany (May 02): The Virtual Black Hole in 2D Quantum Gravity
• Talk given at BritgravII in London (Jun 02): Virtual Black Hole Phenomenology from 2D Dilaton Theories (transparencies of extended version of actual talk)
• Proceedings contribution to ICHEP 2002 (Jul 02): Virtual black holes in generic 2D dilaton theories
• Published paper (Eur.Phys.J. C) by D.G., W. Kummer and D.V. Vassilevich (Aug 02): Virtual black holes in generalized dilaton theories (and their special role in string gravity)
• Talk given at the University of Chicago (Sep 02): Virtual Black Holes and the S-matrix in Generalized Dilaton Gravity
• Published paper (JHEP) by D.G. and D.V. Vassilevich (Oct 02): Non-existence of a dilaton gravity action for the exact string black hole
• Student project by Daniel Mayerhofer (Oct 02): On static solutions of generalized dilaton gravity with scalar (self-interacting) matter
• Lecture by D.G. at The XIV International Hutsulian Workshop "Mathematical Theories and their Physical and Technical Applications" (Nov 02): Transparencies of the lectures on Quantum Dilaton Gravity (also available as .pdf-file!)
• Proceedings contribution to The XIV International Hutsulian Workshop "Mathematical Theories and their Physical and Technical Applications" (Jan 03): A note on the triviality of kappa-deformations of gravity
• Student project by Christian Böhmer (Mar 03): Spherically reduced Fermions and Yang-Mills fields in general relativity
• Published paper (JHEP) by D.G., W. Kummer and D.V. Vassilevich (May 03): Positive specific heat of the quantum corrected dilaton black hole
• Proceedings contribution to The XIV International Hutsulian Workshop "Mathematical Theories and their Physical and Technical Applications" based upon the lectures given there (May 03): Three functions in dilaton gravity: The good, the bad and the muggy
• Student project by J. Knapp and R. Schöfbeck (May 03): Spherical Reduction of Topological Invariants
• Published paper (Ann.Phys.) by D.G. and W. Kummer (Jun 03): The Classical Solutions of the Dimensionally Reduced Gravitational Chern-Simons Theory
• preprint by D.G. (Jul 03): Long time Black Hole evaporation with bounded Hawking flux (cf. next project for the final paper version)
• Talk given at the EURESCO conference "What comes beyond the Standard Model?" in Portoroz (Jul 03): 2D quantum dilaton gravity with matter
• Talk given at the Marcel Grossmann meeting in Rio (Jul 03): Deformations of the Schwarzschild Black Hole
• Workshop organized by D.G., W. Kummer, H. Nicolai and D.V. Vassilevich (Sep/Oct 03): Gravity in Two Dimensions at the Erwin Schrödinger Institut
• Talk given at the ESI workshop on Gravity in Two Dimensions (Sep 03): Quantum Dilaton Gravity with Matter: Virtual Black Holes and the S-matrix
• Published paper (J.Phys. A) by L.Bergamin, D.G. and W.Kummer (Oct 03): Supersymmetric black holes are extremal and bald in 2D dilaton supergravity
• Published paper (Class.Quant.Grav.) by C.Böhmer (Oct 03): The Einstein static universe with torsion and the sign problem of the cosmological constant
• Proceedings contribution to the EURESCO conference "What comes beyond the Standard Model?" in Portoroz, Slovenia, by D.G. and W. Kummer (Oct 03): How to approach Quantum Gravity - Background independence in 1+1 dimensions
• Talk given at the Fock School for Advances in Physics, St. Petersburg, Russia: Advances in Dilaton Gravity
• Proceedings contribution to MGX in Rio, Brazil, by D.G. (Nov 03): Deformations of the Schwarzschild Black Hole
• preprint by H. Balasin and DG (Dec 03): The ultrarelativistic limit of 2D dilaton gravity and its energy momentum tensor (cf. next project for the final paper version)

2d quantum gravity - part of my Ph.D. (Oct. 98 - Dec. 00)

• Check the notations we are using!
• Student project by Robert Wimmer (Nov. 98): Spherical Symmetric d=1+1 Gravity with a massless Scalar Field in Eddington-Finkelstein Gauge
• Student project by "Waldi" Waltenberger (Dec. 98): Conservation Laws in Schwarzschild gauged d=1+1 gravity
• Talk given at the Winterschool in Schladming (Jan. 99, Abstract appears in "Geometry and Quantum Physics", Proceedings of the 38. Internationale Universitätswochen für Kern- und Teilchenphysik, Schladming, Austria, Springer (2000); Editors: H. Gausterer, H. Grosse and L. Pittner): Absolute Conservation Law for Schwarzschild Black Holes
• Student project by D.G. (Feb. 99): Hamiltonian analysis of first order gravity non-minimally coupled to massless scalars
• Student project by Daniel Hofmann (Mar. 99): Spherical Reduction
• Student project by Maria Hörndl (Apr. 99): Lorentzeichfreiheit beim Schwarzschild-Black-Hole
• Published paper (Phys. Rev. D 61 (2000) 064006) by D.G. and W. Kummer: Absolute Conservation Law for Black Holes (click here for a HTML-version!)
• Diploma thesis by Daniel Hofmann (Aug. 99): Spherical Reduction of Brans-Dicke Theory
• Talk given at the conference "Aktuelle Entwicklungen der Gravitationstheorie" in Bad Honnef (Sept. 99): Hamiltonian approach to 2d first order gravity non-minimally coupled to matter
• Student project by Peter Fischer (Okt. 99): Cosmic Censorship, Penrose's Conjecture, Energy Conjecture and - Conditions Related to 2d Reduced Graviviy (click here for a HTML-version!)
• Student project by Manfred Herbst (Nov. 99): The AVTDS Property of the Polarized T3 Gowdy Model (click here for a HTML-version!)
• Miniposter by D.G. (Dec. 99): The embedding of our theory in the space of generalized gravity theories
• Published Paper (Nucl. Phys. B (2000)) by D.G., W. Kummer and D.V. Vassilevich: The virtual black hole in 2d quantum gravity (click here for a HTML-version!)
• Published Paper (Ann. Phys. (2001)) by D.G., D. Hofmann and W. Kummer: Two-Dilaton Theories in Two Dimensions
• Student project by W. Waltenberger (May 00): Evaluation of Poisson Brackets using Mathematica ® - you can download the packages!
• Student project by A. Gerhold (Aug. 00): Spherically reduced gravity in Painleve-Gullstrand gauge
• Poster presented at the Bell Symposium in Vienna (Nov. 00): The virtual black hole in 2D quantum gravity
• Published comment (Mod.Phys.Lett.A) by D.G., D. Hofmann and W. Kummer (Dec. 00): 2D geometry without testparticles is pointless
• Student project by J. Wabnig (Dec. 00): Calculation of a scattering amplitude
• "Endbericht" of the project "Quantentheorie Schwarzer Löcher" (Jan. 01): FWF-page

SToponium - Miniproject (Sep. 1997-Feb. 1998)

• Student project by D.G. (Jun. 96): Feinstruktur des STop-AntiSTop
• Student project by D.G. (Dec. 96): Die Feynmanregeln der SQCD
• Diploma thesis by D.G. (Jan. 97): SToponium - Massenkorrekturen zu O(alpha^4) beim gebundenen STop-AntiStop-System
• Paper by W. Mödritsch: On the spectrum of scalar-scalar bound states
• Student project by Elisabeth Paschinger: Feinstruktur des SToponiums (scanned titelpage)
• Student project by Ingo Schmid: Feinstruktur des SQuarkoniums (not available at the moment)
• Student project by Daniel Hofmann (Dec. 97): Massenkorrekturen für Stoponium durch Wechselwirkung mit dem Higgsteilchen (im Rahmen des MSSM)
• Student project by "Waldi" Waltenberger (Jan. 98): SToponium - Korrekturen der Wellenfunktion beim gebundenen STop-AntiSTop System
• Student project by Daniel Hofmann (Feb. 98): Massenkorrekturen für Stoponium durch HIGGS-Selbstwechselwirkung
• Project report (Feb. 98): short version in english
• Project report (Feb. 98): lengthy version in german

A short visit in the CP-violation experiment NA48 (Jun. 97-Aug. 97)

• Get the CERN-eprint summarizing the 1997 data.
• In collaboration with Laurenz Widhalm and other co-workers we made the PFUI (Practical Fantastic User Interface for the neutral trigger in NA48), the source of which (including documentation) is available here (for sentimental reasons...). Note that the actual version of PFUI may have changed meanwhile...
• Visit the HEPHY, the Austrian link to CERN!

Diploma Thesis about SToponium (May 1996-Feb. 1997)
Parts of the results are published in this paper. This diploma thesis emerged in a collaboration with my colleague L. Widhalm under the supervision of Prof. W. Kummer and Dr. W. Mödritsch.

Current Address

Institut für Theoretische Physik
Universität Leipzig
Augustusplatz 10-11
D-04109 Leipzig
Germany, Europe

Tel: +49-341-97-32-462
Fax: +49-341-97-32-548

Papers (click here for a Q-Spires list!)

Internal (TU Wien)

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