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- National Institute for Subatomic PhysicsNL871 papers
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7 papers · 2 filters
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…
Quantum astrometric observables II: time delay in linearized quantum gravity
Béatrice Bonga, Igor Khavkine
A clock synchronization thought experiment is modeled by a diffeomorphism invariant "time delay" observable. In a sense, this observable probes the causal structure of the ambient…
The Perils of Analytic Continuation
S. P. Miao, P. J. Mora, N. C. Tsamis +1
A nice paper by Morrison demonstrates the recent convergence of opinion that has taken place concerning the graviton propagator on de Sitter background. We here discuss the few poi…
Frame independent cosmological perturbations
Tomislav Prokopec, Jan Weenink
We compute the third order gauge invariant action for scalar-graviton interactions in the Jordan frame. We demonstrate that the gauge invariant action for scalar and tensor perturb…
Symmetry and Evolution in Quantum Gravity
Sean Gryb, Karim Thebault
We propose an operator constraint equation for the wavefunction of the Universe that admits genuine evolution. While the corresponding classical theory is equivalent to the canonic…