782 citations · 4.2k across the 87 of their papers we have counts for
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Curvature perturbations from vacuum transition during inflation
Björn Garbrecht, Pulkit S. Ghoderao, Arttu Rajantie
We demonstrate that in the presence of a light scalar spectator field, vacuum transitions taking place during inflation can produce large, potentially detectable non-Gaussian signa…
Dark matter axion detection in the radio/mm-waveband
Richard A. Battye, Bjoern Garbrecht, Jamie I. McDonald +2
We discuss axion dark matter detection via two mechanisms: spontaneous decays and resonant conversion in neutron star magnetospheres. For decays, we show that the brightness temper…
Axion configurations around pulsars
B Garbrecht, J I McDonald
Axion-like particles lead to a plethora of new phenomena relating to compact astrophysical objects including stellar and black hole superradiance, axion stars and axion clusters. I…
Testing Inflation and Curvaton Scenarios with CMB Distortions
Sebastien Clesse, Björn Garbrecht, Yi Zhu
Prior to recombination, Silk damping causes the dissipation of energy from acoustic waves into the monopole of the Cosmic Microwave Background (CMB), resulting in spectral distorti…
Non-Gaussianities and Curvature Perturbations from Hybrid Inflation
Sébastien Clesse, Björn Garbrecht, Yi Zhu
For the original hybrid inflation as well as the supersymmetric F-term and D-term hybrid models, we calculate the level of non-gaussianities and the power spectrum of curvature per…
Tight constraints on F- and D-term hybrid inflation scenarios
Richard Battye, Bjorn Garbrecht, Adam Moss
We use present cosmological data from the cosmic microwave background, large-scale structure and deuterium at high redshifts to constrain supersymmetric F- and D-term hybrid inflat…