Archive ouverte HAL – Extrapolation to Nonequilibrium from Coarse-Grained Response Theory

Urna Basu 1, 2 Laurent Helden 3 Matthias Krüger 4, 3, 5

Physical Review Letters, American Physical Society, 2018, 120 (18), 〈10.1103/PhysRevLett.120.180604〉

Nonlinear response theory, in contrast to linear cases, involves (dynamical) details, and this makes application to many body systems challenging. From the microscopic starting point we obtain an exact response theory for a small number of coarse grained degrees of freedom. With it, an extrapolation scheme uses near-equilibrium measurements to predict far from equilibrium properties (here, second order responses). Because it does not involve system details, this approach can be applied to many body systems. It is illustrated in a four state model and in the near critical Ising model.

  • 1. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
  • 2. SISSA / ISAS - Scuola Internazionale Superiore di Studi Avanzati / International School for Advanced Studies
  • 3. University of Stuttgart
  • 4. Max Planck Institute for Intelligent Systems
  • 5. Georg-August-University [Göttingen]