Local field theory from the expanding universe at late times in the IIB matrix model

Understand

Recently we have shown that (3+1)-dimensional expanding universe appears dynamically and uniquely from the Lorentzian version of the IIB matrix model, which is considered as a nonperturbative formulation of superstring theory.

• Similarly, it is possible that the Standard Model appears uniquely at the electroweak scale from the same model at late times.
• In order to pursue such a possibility, we discuss how to derive the effective local field theory for the massless modes that appear at late times in the same formulation.
• As a concrete example, we consider the massless modes associated with the spontaneous breaking of (9+1)-dimensional Poincare symmetry and supersymmetry.