Video URL
https://pirsa.org/25050011Temperature-Resistant Order in 2+1 Dimensions
BibTex
@misc{ scivideos_PIRSA:25050011, doi = {10.48660/25050011}, url = {https://pirsa.org/25050011}, author = {Popov, Fedor}, keywords = {Other Physics, Quantum Fields and Strings}, language = {en}, title = {Temperature-Resistant Order in 2+1 Dimensions}, publisher = {Perimeter Institute for Theoretical Physics}, year = {2025}, month = {may}, note = {PIRSA:25050011 see, \url{https://scivideos.org/index.php/pirsa/25050011}} }
Fedor Popov Stony Brook University
Source RepositoryPIRSA
Collection
Talk Type
Scientific Series
Subject
Abstract
High temperatures are typically thought to increase disorder. Here we examine this idea in Quantum Field Theory in 2+1 dimensions. For this sake we explore a novel class of tractable models, consisting of nearly-mean-field scalars interacting with critical scalars. We identify UV-complete, local, unitary models in this class and show that symmetry breaking $\mathbb{Z}_2 \to \emptyset$ occurs at any temperature in some regions of the phase diagram. This phenomenon, previously observed in models with fractional dimensions, or in the strict planar limits, or with non-local interactions, is now exhibited in a local, unitary 2+1 dimensional model with a finite number of fields.