2015/09/30 by Takashi Mori, Tomotaka Kuwahara, Keiji Saito · 5 citations
Mathematics · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Exponential growth #Floquet theory #Hamiltonian (control theory) #Integrable system #Mathematical physics #Mathematics #Physics #Quantum #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Quantum system #Relaxation (psychology) #Statistical physics #cond-mat.quant-gas #cond-mat.stat-mech #quant-ph
paper · pdf · doi:10.1103/physrevlett.116.120401
published as Phys. Rev. Lett. 116, 120401 (2016) · 5+6 pages, 3 figures; typos corrected
openalex publication_date 2016/03/21 · arxiv created 2017/03/17 · arxiv updated 2017/03/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We discuss the universal nature of relaxation in isolated many-body quantum systems subjected to global and strong periodic driving. Our rigorous Floquet analysis shows that the energy of the system remains almost constant up to an exponentially long time in frequency for arbitrary initial states and that an effective Hamiltonian obtained by a truncation of the Floquet-Magnus expansion is a quasiconserved quantity in a long time scale. These two general properties lead to an intriguing classification on the initial stage of relaxation, one of which is similar to the prethermalization phenomenon in nearly integrable systems.