2016/09/28 by Simon A. Weidinger, Michael Knap · 4 citations
Materials Science · Physics and Astronomy · #Energy (signal processing) #Exponent #Floquet theory #Function (biology) #Joule (programming language) #Quantum #Quantum many-body systems #Quantum system #Stability (learning theory) #Thermal properties of materials #Topological Materials and Phenomena #cond-mat.quant-gas #cond-mat.str-el
paper · pdf · doi:10.1038/srep45382
published as Scientific Reports 7, 45382 (2017) · 4+4 pages, 3+3 figures
arxiv created 2016/09/28 · openalex created_date 2016/10/07 · openalex publication_date 2017/04/03 · arxiv updated 2017/04/26 · openalex updated_date 2026/08/05
We study the regimes of heating in the periodically driven O(N)-model, which is a well established model for interacting quantum many-body systems. By computing the absorbed energy with a non-equilibrium Keldysh Green's function approach, we establish three dynamical regimes: at short times a single-particle dominated regime, at intermediate times a stable Floquet prethermal regime in which the system ceases to absorb, and at parametrically late times a thermalizing regime. Our simulations suggest that in the thermalizing regime the absorbed energy grows algebraically in time with an exponent that approaches the universal value of 1/2, and is thus significantly slower than linear Joule heating. Our results demonstrate the parametric stability of prethermal states in a many-body system driven at frequencies that are comparable to its microscopic scales. This paves the way for realizing exotic quantum phases, such as time crystals or interacting topological phases, in the prethermal regime of interacting Floquet systems.