Journal
PHYSICAL REVIEW LETTERS
Volume 116, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.116.120401
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Funding
- JSPS KAKENHI Grant [15K17718]
- JSPS [2611111]
- MEXT [25103003]
- Grants-in-Aid for Scientific Research [25103003, 15K17718, 14J11111, 26400404] Funding Source: KAKEN
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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.
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