Floquet prethermal order by disorder
Year: 2024
Type: article
Abstract: Frustrated magnets can have accidental ground state degeneracies which may be lifted by various forms of disorder, for example in the form of thermal or quantum fluctuations. This order by disorder (ObD) paradigm is well established in equilibrium and here is generalized to Floquet many-body systems. Investigating a periodically driven XXZ-compass model on the square lattice, we show that in a prethermal regime, dynamical fluctuations induced by high-frequency drives select a discrete set of states out of a degenerate ground state manifold of the lowest order Floquet Hamiltonian chosen as initial states. Remarkably, prior to the ObD selection, an unusual fluctuating regime emerges leading to a prethermalization timescale scaling linearly with the drive frequency. We argue that prethermal ObD with its unusual approach to the selected states is a generic phenomenon of driven frustrated systems and confirm it in the paradigmatic J 1 − J 2 XX model. Published by the American Physical Society 2024
Source: Physical Review Research
Authors: Hui-Ke Jin, Johannes Knolle
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Awards: G1520943153, Dynamics of Correlated Quantum Matter: From Dynamical Probes to Novel Phases of Matter
, G1768993395, G2809294039, Constrained Quantum Dynamics, G4710139657, G4871845188, G734228467, TRR 360: Eingeschränkte Quantenmaterie, EXC 2111: Munich Center for Quantum Science and Technology (MCQST)
OpenAlex ID: W4404040587