KIP publications

year 2021
author(s) Daniel Spitz, J├╝rgen Berges, Markus Oberthaler, Anna Wienhard
title Finding self-similar behavior in quantum many-body dynamics via persistent homology
KIP-Nummer HD-KIP 22-01
KIP-Gruppe(n) F17,F20
document type Paper
source SciPost Phys. 11, 060 (2021)
doi 10.21468/SciPostPhys.11.3.060
Abstract (en)

Inspired by topological data analysis techniques, we introduce persistent homology observables and apply them in a geometric analysis of the dynamics of quantum field theories. As a prototype application, we consider data from a classical-statistical simulation of a two-dimensional Bose gas far from equilibrium. We discover a continuous spectrum of dynamical scaling exponents, which provides a refined classification of nonequilibrium self-similar phenomena. A possible explanation of the underlying processes is provided in terms of mixing strong wave turbulence and anomalous vortex kinetics components in point clouds. We find that the persistent homology scaling exponents are inherently linked to the geometry of the system, as the derivation of a packing relation reveals. The approach opens new ways of analyzing quantum many-body dynamics in terms of robust topological structures beyond standard field theoretic techniques.

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