639 citations · 1.1k across the 36 of their papers we have counts for
24 papers · 1 filter
Massive scalar's self-mass from gravitons in de Sitter
Dražen Glavan, Shun-Pei Miao, Tomislav Prokopec +1
We compute the fully renormalized one-graviton-loop contribution to the self-mass of a massive scalar field in de Sitter space. The computation is performed using dimensional regul…
Universal Secular External Leg Corrections for Gauge Independent Scalar Self-Mass on de Sitter
D. Glavan, S. P. Miao, T. Prokopec +1
This work concerns a procedure for removing gauge dependence from graviton corrections to the effective field equations for a massless, minimally coupled scalar on de Sitter backgr…
Cosmological properties of black-hole hair in the linearly coupled scalar-Gauss-Bonnet theory
Dražen Glavan, Darío Jaramillo-Garrido
We investigate the superhorizon behavior of scalar hair sourced by black holes in de Sitter spacetime in the linearly coupled shift-symmetric scalar-Gauss-Bonnet theory. Working in…
Graviton propagator in de Sitter space in a simple one-parameter gauge
Dražen Glavan
We construct the graviton propagator in de Sitter space in a one-parameter family of non-covariant gauges. This family generalizes the simple gauge in which most graviton loop comp…
Spectrum of pure gravity: full Hamiltonian analysis
Will Barker, Dražen Glavan
We perform a full Hamiltonian constraint analysis of pure Ricci-scalar-squared () gravity to clarify recent controversies regarding its particle spectrum. While it is well est…
Two simple photon gauges in inflation
Dražen Glavan
Photon propagators for power-law inflation are constructed in two one-parameter families of noncovariant gauges, in an arbitrary number of spacetime dimensions. In both gauges phot…
Removing spurious degrees of freedom from EFT of gravity
Dražen Glavan, Shinji Mukohyama, Tom Zlosnik
In the effective field theory approach to gravity, the Lagrangian density for general relativity is supplemented by generally covariant terms of higher order in the Riemann tensor…
Hamiltonian analysis of metric-affine- theory
Dražen Glavan, Tom Zlosnik, Chunshan Lin
Determining the number of propagating degrees of freedom in metric-affine theories of gravity requires the use of Hamiltonian constraint analysis, except in some subclasses of theo…
Explaining Large Electromagnetic Logarithms from Loops of Inflationary Gravitons
D. Glavan, S. P. Miao, T. Prokopec +1
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…
Photon propagator in de Sitter space in the general covariant gauge
Dražen Glavan, Tomislav Prokopec
We consider a free photon field in -dimensional de Sitter space, and construct its propagator in the general covariant gauge. Canonical quantization is employed to define the sy…
Large Logarithms from Quantum Gravitational Corrections to a Massless, Minimally Coupled Scalar on de Sitter
D. Glavan, S. P. Miao, T. Prokopec +1
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…
One-loop Graviton Corrections to Conformal Scalars on a de Sitter Background
D. Glavan, S. P. Miao, T. Prokopec +1
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 Sitte…
Abelian Higgs model in power-law inflation: the propagators in the unitary gauge
Dražen Glavan, Anja Marunović, Tomislav Prokopec +1
We consider the Abelian Higgs model in the broken phase as a spectator in cosmological spaces of general space-time dimensions, and allow for the condensate to be time-dependen…
Single Graviton Loop Contribution to the Self-Mass of a Massless, Conformally Coupled Scalar on de Sitter Background
D. Glavan, S. P. Miao, T. Prokopec +1
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 origi…
One-loop electromagnetic correlators of SQED in power-law inflation
Dražen Glavan, Gerasimos Rigopoulos
We examine scalar quantum electrodynamics in power-law inflation space-time, and compute the one-loop correction to electric and magnetic field correlators at superhorizon separati…
Breaking of scaling symmetry by massless scalar on de Sitter
D. Glavan, S. P. Miao, T. Prokopec +1
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 th…
Graviton Propagator in a 2-Parameter Family of de Sitter Breaking Gauges
D. Glavan, S. P. Miao, T. Prokopec +1
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 o…
Einstein-Gauss-Bonnet gravity in 4-dimensional space-time
Dražen Glavan, Chunshan Lin
In this Letter we present a general covariant modified theory of gravity in space-time dimensions which propagates only the massless graviton and bypasses the Lovelock's…
One loop graviton corrections to dynamical photons in de Sitter
D. Glavan, S. P. Miao, Tomislav Prokopec +1
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 fun…
Inflation from cosmological constant and nonminimally coupled scalar
Dražen Glavan, Anja Marunović, Tomislav Prokopec
We consider inflation in a universe with a positive cosmological constant and a nonminimally coupled scalar field, in which the field couples both quadratically and quartically to…
Graviton Loop Corrections to Vacuum Polarization in de Sitter in a General Covariant Gauge
D. Glavan, S. P. Miao, Tomislav Prokopec +1
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 comput…
Late-time backreaction from inflationary fluctuations of a non-minimally coupled massless scalar
D. Glavan, T. Prokopec, D. van der Woude
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 fi…
Backreaction of a massless minimally coupled scalar field from inflationary quantum fluctuations
Drazen Glavan, Tomislav Prokopec, Vasileios Prymidis
In this paper we study a massless, minimally coupled scalar field in a FLRW spacetime with periods of different constant deceleration parameter. We assume the Bunch-Davies vacuum d…
Electrodynamic Effects of Inflationary Gravitons
D. Glavan, S. P. Miao, T. Prokopec +1
We calculate the one-loop corrections from inflationary gravitons to the electromagnetic fields of a point charge and a point magnetic dipole on a locally de Sitter space backgroun…