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23 papers · 2 filters
Reply to `Comment on "Quantum Bounce and Cosmic Recall"' [arXiv:0811.2790]
Alejandro Corichi, Parampreet Singh
A recent Comment [arXiv:0811.2790] on the Letter 'Quantum Bounce and Cosmic Recall' by the authors is shown to arise from an incorrect understanding of the issues at hand and of ou…
Emergent Continuum Spacetime from a Random, Discrete, Partial Order
David Rideout, Petros Wallden
There are several indications (from different approaches) that Spacetime at the Plank Scale could be discrete. One approach to Quantum Gravity that takes this most seriously is the…
A note on bigravity and dark matter
Máximo Bañados, Andrés Gomberoff, Davi C. Rodrigues +1
We show that a class of bi-gravity theories contain solutions describing dark matter. A particular member of this class is also shown to be equivalent to the Eddington-Born-Infeld…
Non-existence of Asymptotically Flat Geons in 2+1 Gravity
Kory A. Stevens, Kristin Schleich, Donald M. Witt
Geons, small topological structures that exhibit particle properties such as charge and angular momentum without the presence of matter sources, have been extensively discussed in…
Spacelike distance from discrete causal order
David Rideout, Petros Wallden
Any discrete approach to quantum gravity must provide some prescription as to how to deduce continuum properties from the discrete substructure. In the causal set approach it is st…
On the `Stationary Implies Axisymmetric' Theorem for Extremal Black Holes in Higher Dimensions
Stefan Hollands, Akihiro Ishibashi
All known stationary black hole solutions in higher dimensions possess additional rotational symmetries in addition to the stationary Killing field. Also, for all known stationary…