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From General Relativity to Quantum Gravity [PDF]
, 2014 In general relativity (GR), spacetime geometry is no longer just a background arena but a physical and dynamical entity with its own degrees of freedom. We present an overview of approaches to quantum gravity in which this central feature of GR is at the
A. Ashtekar, M. Reuter, C. Rovelli
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Quantum vacuum energy in general relativity [PDF]
European Physical Journal C: Particles and Fields, 2018 The paper deals with the scale discrepancy between the observed vacuum energy in cosmology and the theoretical quantum vacuum energy (cosmological constant problem).
Christian Henke
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A Holographic formulation of quantum general relativity [PDF]
Physical Review D, 1998 We show that there is a sector of quantum general relativity, in the Lorentzian signature case, which may be expressed in a completely holographic formulation in terms of states and operators defined on a finite boundary.
L. Smolin
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Quantum general relativity and Hawking radiation [PDF]
Physical Review D, 2002 In a previous paper we set up the Wheeler-DeWitt equation which describes the quantum general relativistic collapse of a spherical dust cloud. In the present paper we specialize this equation to the case of matter perturbations around a black hole, and ...
C. Vaz +3 more
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Complexifier coherent states for quantum general relativity [PDF]
Classical and Quantum Gravity, 2002 Recently, substantial amount of activity in quantum general relativity (QGR) has focused on the semiclassical analysis of the theory. In this paper, we want to comment on two such developments: (1) polymer-like states for Maxwell theory and linearized ...
T. Thiemann
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Deformed General Relativity and Quantum Black Holes Interior [PDF]
Universe, 2020 Effective models of black holes interior have led to several proposals for regular black holes. In the so-called polymer models, based on effective deformations of the phase space of spherically symmetric general relativity in vacuum, one considers a ...
Denis Arruga +2 more
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The Immirzi parameter in quantum general relativity [PDF]
Physical Review D, 1997 Barbero has generalized the Ashtekar canonical transformation to a one-parameter scale transformation U({gamma}) on the phase space of general relativity.
C. Rovelli, T. Thiemann
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A Lorentzian signature model for quantum general relativity [PDF]
Classical and Quantum Gravity, 1999 We give a relativistic spin network model for quantum gravity based on the Lorentz group and its q-deformation, the Quantum Lorentz Algebra. We propose a combinatorial model for the path integral given by an integral over suitable representations of ...
J. Barrett, L. Crane
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Nonlinear optical simulation of the post-Newton Schrödinger equation [PDF]
Nature CommunicationsOne of the grand open problems of modern physics is the unification of Einstein’s general relativity and quantum mechanics. This challenge has been approached by the greatest physicists but there is still no complete theory and experimental evidence ...
Omer Paz +3 more
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