Time: 09:30 am (UTC/GMT+08:00, Beijing/Shanghai), Jul. 29 (Wedn.), 2020
Online Meeting Room (zoom.com): Click here to join the meeting
Meeting ID: 968 4679 9434
Speaker: Prof. Tatsuhiko Ikeda (ISSP)
The Floquet engineering, or controlling material properties and functionalities by time-periodic drives, is one of the forefronts of quantum physics of light-matter interaction, but limited to ideal dissipationless systems. For the Floquet engineering extended to a broader class of materials, it is vital to understand the quantum states emerging in a balance of the periodic drive and energy dissipation. Here we derive the general description for nonequilibrium steady states (NESS) in periodically driven dissipative systems by focusing on the systems under high-frequency drive and time-independent Lindblad-type dissipation. Our formula correctly describes the time-average, fluctuation, and symmetry property of the NESS, and can be evaluated efficiently in numerics. Our results apply to various dissipative quantum systems such as atoms and molecules, mesoscopic systems, and condensed matter.
Reference: T. N. Ikeda and M. Sato, Sci. Adv. 6, eabb4019 (2020).