Results 11 to 20 of about 5,789 (259)
An integrable model of quantum gravity [PDF]
Physics Letters B, 1995 12 ...
Korotkin, D., Nicolai, H.
openaire +6 more sources
Solvable model for quantum gravity? [PDF]
Classical and Quantum Gravity, 2013 We study a type of geometric theory with a non-dynamical one-form field. Its dynamical variables are an $su(2)$ gauge field and a triad of $su(2)$ valued one-forms. Hamiltonian decomposition reveals that the theory has a true Hamiltonian, together with spatial diffeomorphism and Gauss law constraints, which generate the only local symmetries.
Gegenberg, Jack, Husain, Viqar
openaire +2 more sources
Quantum gravity inspired nonlocal gravity model [PDF]
Physical Review D, 2017 We consider a nonlocal gravity model motivated by nonperturbative Quantum Gravity studies. This model, if correct, suggests the existence of strong IR relevant effects which can lead to an interesting late time cosmology. We implement the IR modification directly in the effective action.
Amendola, Luca +2 more
openaire +2 more sources
Modeling quantum gravity effects in inflation [PDF]
Journal of High Energy Physics, 2014 43 pages, no ...
Martinec, Emil J., Moore, Wynton E.
openaire +2 more sources
Quantum gravity as a multitrace matrix model [PDF]
International Journal of Modern Physics A, 2017 We present a new model of quantum gravity as a theory of random geometries given explicitly in terms of a multitrace matrix model. This is a generalization of the usual discretized random surfaces of two-dimensional quantum gravity which works away from two dimensions and captures a large class of spaces admitting a finite spectral triple.
Ydri, Badis +2 more
openaire +3 more sources
A MINIMAL MODEL FOR QUANTUM GRAVITY [PDF]
Modern Physics Letters A, 2005 We argue that the model of a quantum computer with N qubits on a quantum space background, which is a fuzzy sphere with n = 2N elementary cells, can be viewed as the minimal model for quantum gravity. In fact, it is discrete, has no free parameters, is Lorentz-invariant, naturally realizes the holographic principle, and defines a subset of punctures ...
openaire +2 more sources
ON INHOMOGENEITY OF A STRING BIT MODEL FOR QUANTUM GRAVITY [PDF]
International Journal of Modern Physics D, 2005 We study quantum gravitational effect on a two-dimensional open universe with one particle by means of a string bit model. We find that matter is necessarily homogeneously distributed if the influence of the particle on the size of the universe is optimized.
Lee, C.-W. H., Mann, R. B.
openaire +2 more sources
The phase structure of causal dynamical triangulations with toroidal spatial topology
Journal of High Energy Physics, 2018 We investigate the impact of topology on the phase structure of fourdimensional Causal Dynamical Triangulations (CDT). Using numerical Monte Carlo simulations we study CDT with toroidal spatial topology.
J. Ambjørn +4 more
doaj +1 more source
Gravity as an ensemble and the moment problem
Journal of High Energy Physics, 2021 If a bulk gravitational path integral can be identified with an average of partition functions over an ensemble of boundary quantum theories, then a corresponding moment problem can be solved. We review existence and uniqueness criteria for the Stieltjes
Oliver Janssen +2 more
doaj +1 more source
Models for Discrete Quantum Gravity [PDF]
Reports on Mathematical Physics, 2012 15 pages which include 2 figures which were created using LaTeX and contained in the ...
openaire +2 more sources