Seminario: «Testing nonequilibrium currents»

Seminario impartido por el profesor Hugo Touchette (Department of Mathematical Sciences, Stellenbosch University, South Africa).

Resumen: Determining whether a system is in an equilibrium or nonequilibrium state from simulations or experiments is a fundamental problem in statistical physics. In this talk I will discuss how this problem is normally approached by measuring the probability current in space and how it can be made more precise by defining statistical tests involving projections of the current. I will illustrate this point by considering a specific linear projection of the current for diffusion systems, related to the stochastic area, first studied by Paul Lévy in the 1940s for Brownian motion. This area is a good observable for testing the nonequilibrium or nonreversible nature of diffusions as it is a scalar and its statistics can be studied in a precise way using large deviation theory.

• Fecha: Miércoles 25 de Septiembre de 2024
• Lugar: Aula de Física Computacional. Planta Baja de Física. Facultad de Ciencias.
• Horario: 12:00 horas
• Organiza: Departamento de Electromagnetismo y Física de la Materia, e Instituto Carlos I de Física Teórica y Computacional (UGR)
• Más información:
  Pablo I. Hurtado
  Departamento de Electromagnetismo y Física de la Materia
  phurtado@onsager.ugr.es