by Richard E. | Dec 20, 2021 | Early universe dynamics and observables
We argue that inflationary models with a relatively low tensor amplitude r are likely to have a “larger than expected” running, making it more detectable by next generation experiments. In particular, we show that current bounds on r are already strong...
by Richard E. | Oct 30, 2021 | Codes, Feature
PyUltraLight v2 solves the Schrödinger-Poisson in a non-expanding background in combination with moving point masses, simulating the “drag” experienced by point particles moving within a distribution of ultralight dark matter. PyUltraLight v2 is...
by Richard E. | Oct 28, 2021 | Primordial nonlinearity, Self Gravitating Quantum Matter
We carry out the first simulations that follow the possible phase of structure formation in post-inflationary universe for long enough to demonstrate the formation of gravitational solitons – or “inflaton stars”, confirming our earlier predictions. ...
by Richard E. | Oct 6, 2021 | Black Holes and Gravitational Waves, Dark matter and dark energy, Self Gravitating Quantum Matter
We simulate a particle moving in “quantum matter” – that is, material which is described by a wave function that responds to its own gravitational field. This captures “dynamical friction” experienced by a black hole moving within ultralight...
by Richard E. | Sep 4, 2021 | Dark matter and dark energy, Self Gravitating Quantum Matter
We extract the eigenmodes of a Schödinger-Poisson soliton and show that we can use these to model the evolution of a perturbed soliton. Abstract Self-gravitating quantum matter may exist in a wide range of cosmological and astrophysical settings from the very...
