by Richard E. | Aug 26, 2021 | Writing and Videos
If there is an afterlife for physicists it will certainly include conferences pulling together luminaries from across the centuries: “Newton, you really must meet Einstein, he’s over there by the registration desk. I know you’ll have lots to talk about.” My...
by Richard E. | Jul 10, 2021 | Early universe dynamics and observables, Multiverse cosmology
Inflationary trajectories in cosmological landscapes are likely to be associated with saddle points. Moreover, the downhill directions of a “useful” inflationary saddle must be sufficiently flat to ensure that inflation lasts long enough and in models with...
by Richard E. | Nov 26, 2020 | Primordial nonlinearity, Self Gravitating Quantum Matter
This is part of longer-running project at Auckland – the simplest inflationary models can be followed by a long period of pressure-less expansion, which can lead to the formation of collapsed, gravitationally bound structures. The overall process mimics the formation...
by Richard E. | Aug 10, 2020 | Writing and Videos
A talk to the Auckland Astronomical Society that covers the history of the universe – with audience participation…
by Richard E. | Jul 1, 2020 | Codes
Cosmological (and many other) likelihood codes are often computationally expensive to evaluate for a single parameter set and must be computed many times in the course of parameter estimation. This algorithm trains an emulator on evaluated likelihoods and uses it to...
