DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2025 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

DY: Fachverband Dynamik und Statistische Physik

DY 13: Many-body Quantum Dynamics I (joint session DY/TT)

DY 13.11: Talk

Tuesday, March 18, 2025, 12:15–12:30, H37

Towards a Many-Body Generalization of the Wigner-Smith Time Delay — •Georg Maier1, Carolyn Echter2, Juan Diego Urbina1, Caio Lewenkopf3, and Klaus Richter11Institut für Theoretische Physik Universität Regensburg, Regensburg, Germany — 2Mathematische Fakultät Universität Regensburg, Regensburg, Germany — 3Instituto de Física Universidade Federal Fluminense, Niterói RJ, Brazil

Many body systems with a large number of degrees of freedom are usually described by statistical physics on the theoretical side while experiments usually relay on scattering (e.g. particle physics). Is it possible to relate scattering and statistical physics, or to measure scattering-related observables which directly relate to quantities of statistical physics? At least for single particle systems a close relation exists between the well known Wigner-Smith delay time in scattering theory and the density of states of the scattering system.

I will present a novel ansatz relating a many-body version of dwell-/Wigner-Smith delay time and many body density of states based on the famous Birman-Krein-Friedel-Loyd formula connecting scattering theory and statistical observables in the many-body context. Due to the flexibility of this ansatz it can be used to investigate a wide variety of MB systems. I will discuss interesting scaling behaviors for different systems, like the harmonic trap[1] or the free particle together with the different behavior of bosons, fermions and indistinguishable particles.

[1] C. Echter et. al 2409.08696

Keywords: Many-Body Systems; Time-Delay; Quantum Dynamics; Scattering Theory

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2025 > Regensburg