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4 papers · 2 filters
Categorizing Different Approaches to the Cosmological Constant Problem
Stefan Nobbenhuis
We have found that proposals addressing the old cosmological constant problem come in various categories. The aim of this paper is to identify as many different, credible mechanism…
Polygon model from first order gravity
Z. Kadar
The gauge fixed polygon model of 2+1 gravity with zero cosmological constant and arbitrary number of spinless point particles is reconstructed from the first order formalism of the…
On the counting of black hole states in loop quantum gravity
Sergei Alexandrov
We argue that counting black hole states in loop quantum gravity one should take into account only states with the minimal spin at the horizon.
Horizons
Gerard 't Hooft
The gravitational force harbours a fundamental instability against collapse. In standard General Relativity without Quantum Mechanics, this implies the existence of black holes as…