November 13, 2017

Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU)

A research team including Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) Principal Investigator Naoki Yoshida have found a way to improve computer simulations that recreate the movement of neutrinos and astrophysical plasma.



The Vlasov–Poisson equation has played a significant role in simulating how particles move in the Universe, but it also uses a large amount of memory space in computer simulations. Hence, it had been assumed that using Vlasov–Poisson equation in 3D simulations was impossible.



A study lead by the Satoshi Tanaka and Kohji Yoshikawa at the Center for Computational Sciences at the University of Tsukuba, and including Takashi Minoshima at the Japan Agency for Marine-Earth Science and Technology and Kavli IPMU’s Yoshida, managed to develop a solution that allows Vlasov–Poisson equations to be used in computer simulations using a fraction of the usual memory space.



Details of their findings were published in the November 10 issue of the Astrophysical Journal.





Paper details

Journal: Astrophysical Journal

Title: Multidimensional Vlasov–Poisson Simulations with High-order Monotonicity- and Positivity-preserving Schemes

Authors: Satoshi Tanaka (1), Kohji Yoshikawa (1), Takashi Minoshima (2), Naoki Yoshida (3,4)

Author affiliations:

1. Center for Computational Sciences, University of Tsukuba

2. Department of Mathematical Science and Advanced Technology, Japan Agency for Marine-Earth Science and Technology

3. Department of Physics, The University of Tokyo

4 Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo

DOI：10.3847/1538-4357/aa901f

Paper abstract (Astrophysical Journal)

http://iopscience.iop.org/article/10.3847/1538-4357/aa901f

Preprint (arXiv.org)

https://arxiv.org/abs/1702.08521