Speaker
Dr
Mitsuaki Hirasawa
(Istituto Nazionale di Fisica Nucleare (INFN))
Description
The Lorentzian type IIB matrix model is a promising candidate for a nonperturbative formulation of superstring theory. However, it was found recently that a Euclidean space-time appears in the conventional large-$N$ limit. In this work, we add a Lorentz invariant mass term and consider a limit, in which the coefficient of the mass term vanishes at large $N$. By performing complex Langevin simulations to overcome the sign problem, we observe the emergence of expanding space-time with the Lorentzian signature.
Primary author
Dr
Mitsuaki Hirasawa
(Istituto Nazionale di Fisica Nucleare (INFN))
Co-authors
Prof.
Asato Tsuchiya
(Shizuoka University)
Prof.
Jun Nishimura
(KEK)
Dr
Kohta Hatakeyama
(KEK)
Prof.
Konstantinos Anagnostopoulos
(National Technical University of Athens)
Mr
Stratos Papadoudis
(National Technical University of Athens)
Prof.
Takehiro Azuma
(Setsunan University)
