Theory HEP Seminar

Emergence of (3+1)-dimensional expanding space-time from the Lorentzian IKKT matrix model

Jun Nishimura

KEK and SOKENDAI, Tsukuba, Japan

The Lorentzian IKKT matrix model is a promising candidate for a nonperturbative formulation of superstring theory. As such, it is expected to explain the beginning of our Universe and the origin of the Standard Model. The model indeed has a rich structure which enables us to address these issues. In Phys.Rev.Lett.108 (2012) 011601, in particular, we have found that (3+1)D expanding space-time seems to emerge naturally from this model by Monte Carlo simulation. In this talk, I would like to give an overview of the developments since then and provide possible directions for future research.