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5 papers · 2 filters
Elastic Scattering of Cosmological Gravitational Wave Backgrounds: Primordial Black Holes and Stellar Objects
Marcell Howard, Morgane König
Primordial black holes (PBHs) are plausible dark matter candidates that formed from the gravitational collapse of primordial density fluctuations. Current observational constraints…
An SZ-Like Effect on Cosmological Gravitational Wave Backgrounds
Tatsuya Daniel, Marcell Howard, Morgane König
Cosmological gravitational wave backgrounds (CGWBs) are the conglomeration of unresolved gravitational wave signals from early Universe sources, which make them a promising tool fo…
States of Low Energy on Bianchi I spacetimes
Rudrajit Banerjee, Max Niedermaier
States of Low Energy are a class of exact Hadamard states for free quantum fields on cosmological spacetimes whose structure is fixed at {\it all} scales by a minimization principl…
Incompleteness Theorems for Observables in General Relativity
Aristotelis Panagiotopoulos, George Sparling, Marios Christodoulou
The quest for complete observables in general relativity has been a longstanding open problem. We employ methods from descriptive set theory to show that no complete observable on…
Radiation Reaction for Non-Spinning Bodies at 4.5PN in the Effective Field Theory Approach
Adam K. Leibovich, Brian A. Pardo, Zixin Yang
We calculate the 2 post-Newtonian correction to the radiation reaction acceleration for non-spinning binary systems, which amounts to the 4.5 post-Newtonian correction to Newtonian…