Warsaw Spacetime Colloquium: Daniele Oriti (12 March on Zoom)

[ISHPSS]

From: Antonio Vassallo <antonio.va...@gmail.com>

(With apologies for cross-posting)

On Friday, 12 March, Daniele Oriti (LMU Munich) will give a talk entitled “Which spacetime emergence in quantum gravity?” (abstract below).

The meeting will take place online on Zoom (17:00-19:00 CET). If you have not registered yet, you can do so by sending a message to antonio....@pw.edu.pl.

The Colloquium is organized by the Philosophy of Physics Group at the International Center for Formal Ontology (Warsaw University of Technology). The program for the summer semester can be found here.

The recordings of the previous meetings are available on the ICFO's YouTube channel.

ABSTRACT
We discuss several issues in quantum gravity, related to the notion of spacetime being emergent and not fundamental, focusing on their conceptual aspects more than their (possible) technical solution:
– what it means to have spacetime as merely emergent and how this goes beyond what classical GR tells us already;
– which different types of spacetime emergence we can envisage in quantum gravity, among which the picture of spacetime emerging from suitable coarse graining, and the suggestion that this involves a phase transition of the underlying quantum gravity system;
– whether and how such phase transition (geometrogenesis) can be understood as a proper physical process, and how it can enter our picture of the evolution of the universe.
We illustrate these issues, the related proposals, and their possible realizations, with examples taken from quantum gravity formalisms like tensorial group field theory and the related loop quantum gravity, and with a focus on emergent spacetime physics in a cosmological context.