2 citations · 2 across the 3 of their papers we have counts for
6 papers
UV artefacts in ultra-slow-roll models of inflation
Gerald Barnert, Laura Iacconi, Hooshyar Assadullahi +2
Within single-field inflation, primordial black hole and scalar-induced gravitational wave production from enhanced primordial perturbations typically requires a transient non-attr…
Illuminating the Physics of Cosmic Origin and Evolution: A UK Space Frontiers 2035 White Paper
Florian Beutler, Eva-Maria Mueller, Seshadri Nadathur +61
Understanding the Universe's origins and evolution remains one of the most fundamental challenges in modern cosmology. This white paper explores three key science priorities in thi…
Stochastic inflation beyond slow roll: noise modelling and importance sampling
Joseph H. P. Jackson, Hooshyar Assadullahi, Andrew D. Gow +3
We simulate the distribution of very rare, large excursions in the primordial density field produced in models of inflation in the very early universe which include a strong enhanc…
Efficient Compression of Redshift-Space Distortion Data for Late-Time Modified Gravity Models
Yo Toda, Adrià Gómez-Valent, Kazuya Koyama
Current cosmological observations allow for deviations from the standard growth of large-scale structures in the universe. These deviations could indicate modifications to General…
Fast production of cosmological emulators in modified gravity: the matter power spectrum
Bartolomeo Fiorini, Kazuya Koyama, Tessa Baker
We test the convergence of fast simulations based on the COmoving Lagrangian Acceleration (COLA) method for predictions of the matter power spectrum, specialising our analysis in t…
The separate-universe approach and sudden transitions during inflation
Joseph H. P. Jackson, Hooshyar Assadullahi, Andrew D. Gow +3
The separate-universe approach gives an intuitive way to understand the evolution of cosmological perturbations in the long-wavelength limit. It uses solutions of the spatially-hom…