Results 41 to 50 of about 178,359 (292)
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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, 2015 No-hair theorems in theories of gravity with a scalar field are briefly and critically reviewed. Their significance and limitations are discussed and potential evasions are considered.Comment: 16 pages, contribution to the Classical and Quantum Gravity ...
Sotiriou, Thomas P.
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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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Doomsdays in a modified theory of gravity: A classical and a quantum approach
Physics Letters B, 2017 By far cosmology is one of the most exciting subject to study, even more so with the current bulk of observations we have at hand. These observations might indicate different kinds of doomsdays, if dark energy follows certain patterns. Two of these doomsdays are the Little Rip (LR) and Little Sibling of the Big Rip (LSBR).
Imanol Albarran +3 more
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Small free field inflation in higher curvature gravity
Journal of High Energy Physics, 2021 Within General Relativity, a minimally coupled scalar field governed by a quadratic potential is able to produce an accelerated expansion of the universe provided its value and excursion are larger than the Planck scale.
José D. Edelstein +3 more
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Strong gravity signatures in the polarization of gravitational waves
, 2019 General Relativity is a hugely successful description of gravitation. However, both theory and observations suggest that General Relativity might have significant classical and quantum corrections in the Strong Gravity regime.
Shankaranarayanan, S.
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A spectre is haunting the cosmos: Quantum stability of massive gravity with ghosts [PDF]
, 2016 Many theories of modified gravity with higher order derivatives are usually ignored because of serious problems that appear due to an additional ghost degree of freedom. Most dangerously, it causes an immediate decay of the vacuum.
Akrami, Yashar +4 more
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Advanced Engineering Materials, EarlyView.Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
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Journal of High Energy PhysicsSome time ago, the standard geometric framework of Einstein gravity was extended by gauging the Maxwell algebra as well as the so called AdS-Maxwell algebra.
L. Avilés +4 more
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Quantum gravity fluctuations in the timelike Raychaudhuri equation
Journal of High Energy Physics, 2023 We consider a timelike geodesic congruence in the presence of perturbative quantum fluctuations of the spacetime metric. We calculate the change in the volume of a bundle of geodesics due to such fluctuations and thereby obtain a quantum-gravitationally ...
Sang-Eon Bak +3 more
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