The Fuzzy Onion: A proposal

Abstract

It is generally believed that the space has a nontrivial structure which is apparent on the order of the Planck length. There is a class of models of three-dimensional quantum spaces constructed using different mathematical tools. Also, there is another class of models with matrix descriptions of spaces of various dimensions and geometries with built-in momentum cut-off -- these are called fuzzy spaces; the fuzzy sphere is a prominent example. In this paper, we describe how to connect various spheres together to foliate a three-dimensional space dubbed the fuzzy onion.

Comments: Prepared for proceedings of Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity"