Dec 11 – 15, 2023
Tsung-Dao Lee Institute
Asia/Shanghai timezone

Non-linear flows for the neutrino masses

Dec 15, 2023, 9:40 AM
Hall # 9

Hall # 9

Contributed talk in mini symposium Cosmology with large-scale structure


Amol Upadhye (Yunnan University)


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)

Presentation materials