16–20 janv. 2023
Institut Henri Poincaré
Fuseau horaire Europe/Paris

Emergence of macroscopic spacetimes in a certain large-N limit of canonical tensor model

20 janv. 2023, 09:30
50m
Amphithéâtre Hermite (Institut Henri Poincaré)

Amphithéâtre Hermite

Institut Henri Poincaré

11 rue Pierre et Marie Curie 75005 Paris

Orateur

Naoki Sasakura (Yukawa Institute for Theoretical Physics, Kyoto University)

Description

It is challenging to realize emergence of macroscopic spacetimes in tensor models. We study a wave function of a tensor model in the canonical formalism in a certain large-N limit, in which the wave function can reliably be computed classically (namely, by saddle points). We show that spacetimes develop through successive first-order phase transitions, in which numbers of “points” increase one by one. When a positive cosmological constant is turned on, Lie-group symmetric macroscopic spacetimes with locality have large amplitudes.

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