Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 11: Focus Session: Quantum Dynamics of Kinetically Constrained Many-Body Systems (joint session TT/DY)

DY 11.5: Hauptvortrag

Dienstag, 2. April 2019, 11:45–12:15, H2

Slow dynamics due to kinetic constraints, from classical to quantum — •Juan Garrahan — School of Physics and Astronomy, University of Nottingham

Classical many-body systems that display slow collective relaxation - the canonical example being those that form glass - often do so due to effective constraints in the their dynamics. The simplest manifestation of this principle is in so-called kinetically constrained models (KCMs) where dynamical constraints are explicit. After reviewing the basic properties of constrained dynamics in classical systems, I will dis- cuss how similar ideas can be made relevant for quantum many-body systems. I will describe quantum KCMs which display slow thermalization and even in certain cases (apparent) non-ergodicity in the absence of disorder. Like in the classical case, I will show how slow relaxation goes together with spatially fluctuating dynamics, giving rise to heterogeneous growth of entanglement. I will also discuss connections with other quantum systems with complex dynamics such as fracton models. My main aim will be to highlight links between concepts and methods of classical and quantum non-equilibrium.