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Boundary conditions and KMS states

Grant number: 20/14563-0
Support type:Scholarships abroad - Research Internship - Doctorate (Direct)
Effective date (Start): June 01, 2021
Effective date (End): March 31, 2022
Field of knowledge:Physical Sciences and Mathematics - Mathematics - Applied Mathematics
Principal researcher:Rodrigo Bissacot Proença
Grantee:Lucas Affonso Silva Pereira
Supervisor abroad: Marcelo Laca
Home Institution: Instituto de Matemática e Estatística (IME). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Research place: University of Victoria (UVic), Canada  
Associated to the scholarship:17/18152-2 - Phase transitions on Quantum Ising Models, BP.DD

Abstract

The notion of equilibrium is central in statistical mechanics. In the classical case, the DLR equations describe all the possible equilibrium states for a spin lattice system. In the quantum case, where the appropiate notion of equilibrium is the KMS condition, the very notion of boundary condition is not well understood, even though some proposals already exist. In this project, using the groupoid picture, we intend to solve this problem by introducing an appropriate notion of boundary condition and proving that the KMS condition may be described by a set of equations closely related to the DLR equation. (AU)

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