The Lorentzian type IIB matrix model is a promising candidate for a non-perturbative formulation of superstring theory. However, it was recently found that a Euclidean space-time appears in the conventional large-N limit. In this work, we study the model with a Lorentz invariant mass term which can be considered as an IR regulator. By performing complex Langevin simulations to overcome the sign problem, we observe the emergence of expanding space-time with Lorentzian signature.
@article{arxiv.2307.01681,
title = {The emergence of expanding space-time in the Lorentzian type IIB matrix model with a novel regularization},
author = {Mitsuaki Hirasawa and Konstantinos N. Anagnostopoulos and Takehiro Azuma and Kohta Hatakeyama and Jun Nishimura and Stratos Papadoudis and Asato Tsuchiya},
journal= {arXiv preprint arXiv:2307.01681},
year = {2023}
}
Comments
13 pages, 9 figures, proceedings of Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity"