ar X iv : g r - qc / 0 41 00 54 v 1 1 3 O ct 2 00 4 Gravity and the Quantum

ar X iv : g r - qc / 0 41 00 54 v 2 1 9 O ct 2 00 4 Gravity and the Quantum

The goal of this article is to present a broad perspective on quantum gravity for non-experts. After a historical introduction, key physical problems of quantum gravity are illustrated. While there are a number of interesting and insightful approaches to address these issues, over the past two decades sustained progress has primarily occurred in two programs: string theory and loop quantum grav...

ar X iv : g r - qc / 0 51 01 27 v 1 3 1 O ct 2 00 5 Imprints of Spacetime Topology in the Hawking - Unruh Effect

ar X iv : g r - qc / 0 61 01 16 v 1 2 4 O ct 2 00 6 Perturbative Quantum Gravity Coupled to Particles in ( 1 + 1 ) - Dimensions

We consider the problem of (1 + 1)-dimensional quantum gravity coupled to particles. Working with the canonically reduced Hamiltonian, we obtain its post-Newtonian expansion for two identical particles. We quantize the (1 + 1)-dimensional Newtonian system first, after which explicit energy corrections to second order in c−1 are obtained. We compute the perturbed wavefunctions and show that the ...

ar X iv : g r - qc / 0 41 21 17 v 1 2 3 D ec 2 00 4 A quantum mass - spectrum of Kerr black hole : superstrings

Using thermal quantization of geodesics confined under horizons and reasonable conjecture on massless modes, we evaluate quantum spectrum of Kerr black hole masses compatible with superstring symmetries.

ar X iv : g r - qc / 9 71 00 20 v 1 3 O ct 1 99 7 THE RELIABILITY HORIZON

The " reliability horizon " for semi-classical quantum gravity quantifies the extent to which we should trust semi-classical quantum gravity, and gives a handle on just where the " Planck regime " resides. The key obstruction to pushing semi-classical quantum gravity into the Planck regime is often the existence of large metric fluctuations, rather than a large back-reaction.