Quantum Gravitation
(Publications 1995  2005)
We extend to stringtheory the central idea of supersymmetric quantum mechanics, namely that particle dynamics in an external potential can be viewed as a suitable deformation of the freeparticle dynamics. The goal is to obtain a simple unified picture of the dynamics of strings in the backgrounds formed by condensates of the various bosonic zeroenergy string modes.
 From Loop Space Mechanics to Nonabelian Strings.
U. Schreiber Ph.D. thesis
Universität DuisburgEssen, 2005.
 Discrete differential geometry on causal graphs.
E. Forgy and U. Schreiber
mathph/0407005,
2004.
 Higher gauge theory: 2connections on 2bundles.
J. Baez and U. Schreiber
hepth/0412325,
2004.
 Nonabelian 2forms and loop space connections from BSCFT
deformations.
U. Schreiber
submitted to JHEP,
2004.
 DDF and Pohlmeyer invariants of (super)string.
U. Schreiber.
JHEP05(2004)027 2004.
eprint
 On deformations of 2d SCFTs.
U. Schreiber.
High Energy Physics, JHEP06(2004)058, 2004.
eprint
 Covariant Hamiltonian evolution in supersymmetric
quantum systems.
U. Schreiber.
submitted to High Energy Physics, 2004,
hepth/0311064
 Supersymmetric homogeneous quantum cosmology.
U. Schreiber, diploma thesis.
Universität Essen, 2002.

Triad representation of the ChernSimons state in quantum gravity.
Robert Paternoga and Robert Graham.
Phys.Rev.D, 62:21, 2000.
grqc/0003111

The ChernSimons state for the nondiagonal Bianchi IX model.
R. Paternoga and R. Graham.
Phys.Rev.D 58:083501, 1998.
grqc/9802009

Exact quantum states for the Bianchi type IX model
with negative cosmological constant.
Robert Paternoga and Robert Graham.
Phys.Rev.D 54, 48054812, 1996.

Physical states of Bianchi type IX quantum cosmologies described by the
ChernSimons functional.
Robert Graham and Robert Paternoga.
Phys.Rev., D54, 25892604, 1996.

Supersymmetric minisuperspace with nonvanishing fermion
number.
A. Csordás and R. Graham.
Phys.Rev.Lett., 74:4129, 1995.
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