Speaker
Dr
Jun Nishimura
(KEK)
Description
We discuss our numerical work on the IKKT matrix model, which was conjectured to be a nonperturbative formulation of superstring theory. In particular, we focus on its Euclidean version, which is speculated to undergo an SSB of SO(10) rotational symmetry, corresponding to the dynamical generation of 4d space-time, due to the effects of the complex fermion determinant. While this issue is difficult to study by conventional Monte Carlo methods because of the sign problem, we show that the complex Langevin method can give clear answers. After discussing important recent developments concerning this method, we present explicit results for some simplified matrix models as well as preliminary results for the original IKKT model.
Ref.) JHEP 1802 (2018) 151 [arXiv:1712.07562 [hep-lat]]
