Quantizing gravity and spacetime: where do we stand?

Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv, Israel 69978, and Center for Particle Physics, University of Texas, Austin, Texas 78712, USA

Received 13 July 1998, accepted 23 July 1998 by F. W. Hehl

The Nambu-Goto Theory of Closed Bosonic Strings Moving in 1+3 Dimensional Minkowski Space: The Quantum Algebra of Observables

Fakultät für Physik, Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany

Received 10 October 1998, accepted 20 October 1998 by K. Fredenhagen

The Nambu-Goto theory of closed bosonic strings moving in 1+3 dimensional Minkowski space: the construction of the quantum algebra of observables up to degree five

Received 4 November 1998, accepted 18 November 1998 by K. Fredenhagen

Nonuniqueness of memories

Institute of Physics of Charles University, Faculty of Mathematics and Physics, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

Received 15 May 1998, revised 2 September 1998, accepted 16 September 1998 by U. Eckern

Hamiltonian evolution and quantization for extremal black holes

Universität Freiburg / Max-Planck-Institut füer Gravitationsphysik, Po tsdam

Received 16 October 1998, accepted 30 October 1998 by F. W. Hehl

Atomic interferometry as two-level particle scattering by a periodic potential

Institut Galilee, Paris / Universität Konstanz

Received 15 July 1998, accepted 9 October 1998 by F. W. Hehl