Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Glavan, D."'
Publikováno v:
JHEP 03 (2024) 129
Dependence on the graviton gauge enters the conventional effective field equations because they fail to account for quantum gravitational correlations with the source which excites the effective field and with the observer who measures it. Including
Externí odkaz:
http://arxiv.org/abs/2402.05452
Publikováno v:
JHEP 08 (2023) 195
Recent progress on nonlinear sigma models on de Sitter background has permitted the resummation of large inflationary logarithms by combining a variant of Starobinsky's stochastic formalism with a variant of the renormalization group. We reconsider s
Externí odkaz:
http://arxiv.org/abs/2307.09386
Publikováno v:
JHEP 03 (2022) 088
We consider single graviton loop corrections to the effective field equation of a massless, minimally coupled scalar on de Sitter background in the simplest gauge. We find a large temporal logarithm in the approach to freeze-in at late times, but no
Externí odkaz:
http://arxiv.org/abs/2112.00959
Publikováno v:
Phys. Rev. D 103, 105022 (2021)
We exploit a recent computation of one graviton loop corrections to the self-mass [1] to quantum-correct the field equation for a massless, conformally coupled scalar on a de Sitter background. With the obvious choice for the finite part of the $R^2
Externí odkaz:
http://arxiv.org/abs/2007.10395
Publikováno v:
Phys. Rev. D 101, 106016 (2020)
We use a simplified formalism to re-compute the single graviton loop contribution to the self-mass of a massless, conformally coupled scalar on de Sitter background which was originally made by Boran, Kahya and Park [1-3]. Our result resolves the pro
Externí odkaz:
http://arxiv.org/abs/2003.02549
Publikováno v:
Physics Letters B 798 (2019) 134944
We study the response of a classical massless minimally coupled scalar to a static point scalar charge on de Sitter. By considering explicit solutions of the problem we conclude that -- even though the dynamics formally admits dilatation (scaling) sy
Externí odkaz:
http://arxiv.org/abs/1908.11113
Publikováno v:
JHEP 10 (2019) 096
We formulate the graviton propagator on de Sitter background in a 2-parameter family of simple gauges which break de Sitter invariance. Explicit results are derived for the first order perturbations in each parameter. These results should be useful i
Externí odkaz:
http://arxiv.org/abs/1908.06064
We employ a recent, general gauge computation of the one loop graviton contribution to the vacuum polarization on de Sitter to solve for one loop corrections to the photon mode function. The vacuum polarization takes the form of a gauge independent,
Externí odkaz:
http://arxiv.org/abs/1609.00386
Publikováno v:
Class. Quantum Grav. 32 (2015) 195014
We evaluate the one-graviton loop contribution to the vacuum polarization on de Sitter background in a 1-parameter family of exact, de Sitter invariant gauges. Our result is computed using dimensional regularization and fully renormalized with BPHZ c
Externí odkaz:
http://arxiv.org/abs/1504.00894
Publikováno v:
Phys. Rev. D 91, 024014 (2015)
We consider the late time one-loop quantum backreaction from inflationary fluctuations of a non-minimally coupled, massless scalar field. The scalar is assumed to be a spectator field in an inflationary model with a constant principal slow roll $\eps
Externí odkaz:
http://arxiv.org/abs/1408.4705