Alumnae and Alumni

Keisuke Izumi
Project Researcher (from 2009/04/01 to 2011/03/31)
Current Affiliation
Theoretical Particle Physics Group, Department of Physics, Graduate School of Science, Nagoya University
Assistant Professor


Last Update 2021/04/06

The present-day acceleration of the universe’s expansion is one of cosmology’s most interesting phenomena. Although most investigations take a scalar approach, this phenomenon may indicate large-scale modification of general relativity. Ghost excitation, which has negative energy, is problematic for a modified gravity theory that takes into account this acceleration. However, I’ve shown that ghost excitation causes negligible instability.

Back to Member List.