Speaker
Amol Upadhye
(Yunnan University)
Description
Recently, I developed a non-linear multi-flow perturbation theory for massive neutrinos and other free-streaming particles, called Flows For The Masses. It bins their initial Fermi-Dirac distribution into discrete momenta, with neutrinos of each initial momentum treated as a separate fluid obeying the continuity and Euler equations of motion. I describe its non-linear corrections, based upon a generalization of the Time-Renormalization Group perturbation theory, and their acceleration by over two orders of magnitude using Fast Fourier Transform techniques. Then, I discuss ongoing work to emulate the massive neutrino power spectrum in cosmologies with rapidly-varying dark energy, and I propose further applications to N-body simulations.
Primary authors
Amol Upadhye
(Yunnan University)
Dr
Joe Chen
(University of New South Wales)
Prof.
Yvonne Wong
(University of New South Wales)
