Results 41 to 50 of about 6,479 (312)
A new approach and code for spinning black holes in modified gravity
, 2023 We discuss and implement a spectral method approach to computing stationary and axisymmetric black hole solutions and their properties in modified theories of gravity.
David J Mulryne +5 more
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Ghost free mimetic massive gravity
Journal of High Energy Physics, 2018 The mass of the graviton can be generated using a Brout-Englert-Higgs mechanism with four scalar fields. We show that when one of these fields is costrained as in mimetic gravity, the massive gravity obtained is ghost free and consistent.
Ali H. Chamseddine, Viatcheslav Mukhanov
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Monodromy inflation and an emergent mechanism for stabilising the cosmological constant
Journal of High Energy Physics, 2019 We show that a pair of field theory monodromies in which the shift symmetry is broken by small, well motivated deformations, naturally incorporates a mechanism for cancelling off radiative corrections to the cosmological constant.
Antonio Padilla
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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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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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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.
openaire +2 more sources
Classical Gauge Theory of Gravity
Theoretical and Mathematical Physics, 2002 The classical theory of gravity is formulated as a gauge theory on a frame bundle with spontaneous symmetry breaking caused by the existence of Dirac fermionic fields. The pseudo-Riemannian metric (tetrad field) is the corresponding Higgs field. We consider two variants of this theory.
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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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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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SPACETIME OR QUANTUM PARTICLES: THE ONTOLOGY OF QUANTUM GRAVITY? [PDF]
, 1996 The domains of quantum theory and general relativity overlap in situations where quantum mechanical effects cannot be ignored. In order to deal with this overlap of theoretical domains, there has been a tendency to apply the rules of quantum field theory
Peter J. Riggs +2 more
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