Results 61 to 70 of about 2,908,412 (339)
T-duality and high-derivative gravity theories: the BTZ black hole/string paradigm [PDF]
Journal of High Energy Physics, 2018 A bstractWe show that the temperature and entropy of a BTZ black hole are invariant under T-duality to next to leading order in M⋆− 2, M⋆ being the scale suppressing higher-curvature/derivative terms in the Lagrangian.
J. Edelstein +3 more
semanticscholar +1 more source
Beyond the Einstein Equation of State: Wald Entropy and Thermodynamical Gravity [PDF]
Entropy 18 (2016) 119, 2009 We show that the classical equations of gravity follow from a thermodynamic relation, dQ = T dS, where S is taken to be the Wald entropy, applied to a local Rindler horizon at any point in spacetime. Our approach works for all diffeomorphism-invariant theories of gravity. This suggests that classical gravity may be thermodynamic in origin.
arxiv +1 more source
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
doaj +1 more source
Advanced Physics Research, EarlyView., 2023 The paper discusses the role of scale anomaly in generating edge electric currents via the scale magnetic effect in scalar electrodynamics. Although the boundary electric current is much weaker than the Meissner current induced in superconducting materials, the scale anomaly can enhance conductivity near the boundary of the material.
Maxim Chernodub +2 more
wiley +1 more source
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
doaj +1 more source
Quantum equivalence of $f(R)$ gravity and scalar-tensor theories [PDF]
, 2017 We investigate whether the classical equivalence of f(R) gravity and its formulation as scalar-tensor theory still holds at the quantum level. We explicitly compare the corresponding one-loop divergences and find that the equivalence is broken by off ...
M. Ruf, C. Steinwachs
semanticscholar +1 more source
Archives of Thermodynamics, 2023 The theory of generalized two-temperature thermoelasticity is used to solve the boundary value problems between two elastic media with two different types of temprature under the influence of gravity.The classical dynamical coupled theory and Lord ...
K. Lotfy, M. Gabr
semanticscholar +1 more source
4D spin-2 fields from 5D Chern-Simons theory
Journal of High Energy Physics, 2018 We consider a 5-dimensional Chern-Simons gauge theory for the isometry group of Anti-de-Sitter spacetime, AdS4+1 ≃ SO(4, 2), and invoke different dimensional reduction schemes in order to relate it to 4-dimensional spin-2 theories.
N. L. González Albornoz +3 more
doaj +1 more source
Quantum Equivalence of $f(R)$ Gravity and Scalar-tensor Theories in the Jordan and Einstein Frames [PDF]
, 2017 The $f(R)$ gravity and scalar-tensor theory are known to be equivalent at the classical level. We study if this equivalence is valid at the quantum level. There are two descriptions of the scalar-tensor theory in the Jordan and Einstein frames.
N. Ohta
semanticscholar +1 more source
An Underlying Theory for Gravity [PDF]
Journal of Physics: Conference Series 484 (2014) 012061, 2012 A new direction to understand gravity has recently been explored by considering classical gravity to be a derived interaction from an underlying theory. This underlying theory would involve new degrees of freedom at a deeper level and it would be structurally different from classical gravitation.
arxiv +1 more source