Seminar at CPHT

Date: Mardi 10 Mars 2026

Heure: 11:00

Salle: Salle de Conférence Louis Michel

 

Spearker: Nelson Merino Moncada (Universidad Arturo Prat)

Title: The Katz, Bicák and Lynden-Bell (KBL) regularization and its applications
 

Abstract: The Katz boundary term provides a well-defined variational principle under Dirichlet boundary conditions and, when combined with a subtraction of the action evaluated on a background, known as the KBL regularization procedure, yields finite Noether charges and a finite on-shell action. This boundary term is constructed from the dynamical metric and the difference between the Christoffel symbols associated with the dynamical manifold and a reference background. So far, this method has been tested only for specific solutions. In this work (soon to be submitted for publication), using the Fefferman-Graham gauge, we show that the finiteness of conserved charges can be proven for families of asymptotically locally Anti–de Sitter spacetimes in general relativity. The finiteness of the charges can be established in arbitrary dimensions; however, the prescription for defining the background in this framework distinguishes between even and odd spacetime dimensions. Other possible applications and potential relations with the covariant phase space method will also be discussed.