SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 14: Many-Body Quantum Dynamics I (joint session DY/TT)
TT 14.3: Vortrag
Mittwoch, 29. September 2021, 14:15–14:30, H6
(Classical) Prethermal phases of matter — •Andrea Pizzi1, Andreas Nunnenkamp2, and Johannes Knolle3 — 1Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom — 2School of Physics and Astronomy and Centre for the Mathematics and Theoretical Physics of Quantum Non-Equilibrium Systems, University of Nottingham, Nottingham, NG7 2RD, United Kingdom — 3Department of Physics, Technische Universität München, James-Franck-Straße 1, D-85748 Garching, Germany
Systems subject to a high-frequency drive can spend an exponentially long time in a prethermal regime, in which novel phases of matter with no equilibrium counterpart can be realized. Due to the notorious computational challenges of quantum many-body systems, numerical investigations in this direction have remained limited to one spatial dimension, in which long-range interactions have been proven a necessity. Here, we show that prethermal non-equilibrium phases of matter are not restricted to the quantum domain. Studying the Hamiltonian dynamics of a large three-dimensional lattice of classical spins, we provide the first numerical proof of prethermal phases of matter in a system with short-range interactions. Concretely, we find higher-order as well as fractional discrete time crystals breaking the time-translational symmetry of the drive with unexpectedly large integer as well as fractional periods. Our work paves the way towards the exploration of novel prethermal phenomena by means of classical Hamiltonian dynamics with virtually no limitations on the system's geometry or size, and thus with direct implications for experiments.