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The dynamics of cosmological scenarios inspired by quantum gravity [PDF]
, 2006 PhDIn this thesis we study the dynamics of cosmological scenarios inspired by quantum gravity. Part I investigates novel features of the semi-classical regime of homogeneous and isotropic loop quantum cosmology.
Mulryne, David James
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A new geometric flow on 3-manifolds: the K-flow
Journal of High Energy Physics, 2023 We define a new geometric flow, which we shall call the K-flow, on 3-dimensional Riemannian manifolds; and study the behavior of Thurston’s model geometries under this flow both analytically and numerically.
Kezban Tasseten, Bayram Tekin
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An Ultralocal Classical and Quantum Gravity Theory
Journal of High Energy Physics, Gravitation and Cosmology, 2020 8 pages; an ultralocal gravity is quantized proving that full gravity can be affine quantized: a minor equation or two errors ...
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From Classical Theory to Quantum Gravity [PDF]
Space Science Reviews, 2009 While it has been generally accepted for decades that general relativity and quantum theory are inconsistent, and that therefore general relativity must yield to a new theory of gravity compatible with quantum principles, the way to the new theory is still very unclear.
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From classical theory to spin 2 gravity
Intellectual Archive, 2021 We consider here the simple derivation of the Einstein equations by Fock. Then, we approach the way from the spin 1 fields to the spin 2 fields for massive and massless particles and we derive the gravity equations from this base. In conclusion, we discuss the principle of equivalence in classical Einstein theory and in the Schwinger spin 2 ...
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Non-relativistic geometry of holographic screens
Journal of High Energy Physics, 2017 We propose that the intrinsic geometry of holographic screens should be described by the Newton-Cartan geometry. As a test of this proposal, we show that the evolution equations of the screen can be written in a covariant form in terms of a stress tensor,
Mudassir Moosa
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Gravitational SL(2, ℝ) algebra on the light cone
Journal of High Energy Physics, 2021 In a region with a boundary, the gravitational phase space consists of radiative modes in the interior and edge modes at the boundary. Such edge modes are necessary to explain how the region couples to its environment.
Wolfgang Wieland
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Singularity-free classical theory of gravity
Physical Review DWe present a classical theory of gravity, which is singularity free at short distances and reduces to General Relativity at large distances. We discuss its implications.
Saurya Das, Mitja Fridman, Sourav Sur
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Mimetic massive gravity: beyond linear approximation
Journal of High Energy Physics, 2018 We present a theory of ghost-free massive gravity where the mass of the graviton is generated through the Brout-Englert-Higgs (BEH) mechanism and one of the four scalar fields used is that of mimetic gravity.
Ali H. Chamseddine, Viatcheslav Mukhanov
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The cosmological constant as a boundary term
Journal of High Energy Physics, 2022 We compare the path integral for transition functions in unimodular gravity and in general relativity. In unimodular gravity the cosmological constant is a property of states that are specified at the boundaries whereas in general relativity the ...
Wilfried Buchmüller, Norbert Dragon
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