ar X iv : g r - qc / 0 30 80 01 v 1 3 1 Ju l 2 00 3 Effects of electrical charging on the mechanical Q of a fused silica disk

ar X iv : g r - qc / 0 50 70 97 v 1 2 3 Ju l 2 00 5 Frequency and surface dependence of the mechanical loss in fused silica

Steven D. Penn, Alexander Ageev, Dan Busby, Gregory M. Harry, Andri M. Gretarsson, Kenji Numata, and Phil Willems Department of Physics, Hobart and William Smith Colleges, Geneva, NY 14456, USA. Department of Physics, Syracuse University, Syracuse, NY 13244, USA. LIGO Laboratory, California Institute of Technology Pasadena, CA 91125, USA. LIGO Laboratory, Massachusetts Institute of Technology, ...

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 30 70 62 v 1 1 2 Ju l 2 00 3 Global aspects of gravitomagnetism

We consider global properties of gravitomagnetism by investigating the grav-itomagnetic field of a rotating cosmic string. We show that although the gravitomagnetic field produced by such a configuration of matter vanishes locally , it can be detected globally. In this context we discuss the gravitational analogue of the Aharonov-Bohm effect.

ar X iv : g r - qc / 0 30 70 78 v 1 1 6 Ju l 2 00 3 3 D gravity with torsion as a Chern - Simons gauge theory

We show that topological 3D gravity with torsion can be formulated as a Chern-Simons gauge theory, provided a specific parameter, known as the effective cosmological constant, is negative. In that case, the boundary dynamics of the theory corresponding to anti-de Sitter boundary conditions is described by a conformal field theory with two different central charges.

ar X iv : g r - qc / 0 30 71 10 v 1 2 5 Ju l 2 00 3 A WORMHOLE - GENERATED PHYSICAL UNIVERSE WITH REFINED APPROXIMATION ∗

We improved the approximation of the model of the wormhole generated physical universe constructed by Choudhury and Pendharkar. We show here that the negative pressure of the unphysical wormhole can generate the right physical condition to explain the correct sign of the deacceleration parameter q0. The negative sign of q0 implies an accelerating universe.