Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevB.100.085308
Title: Floquet dynamical quantum phase transitions
Authors: Yang, Kai
Zhou, Longwen 
Ma, Wenchao
Kong, Xi
Wang, Pengfei 
Qin, Xi
Rong, Xing
Wang, Ya
Shi, Fazhan
Gong, Jiangbin 
Du, Jiangfeng 
Keywords: Science & Technology
Technology
Physical Sciences
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Materials Science
Physics
Issue Date: 28-Aug-2019
Publisher: AMER PHYSICAL SOC
Citation: Yang, Kai, Zhou, Longwen, Ma, Wenchao, Kong, Xi, Wang, Pengfei, Qin, Xi, Rong, Xing, Wang, Ya, Shi, Fazhan, Gong, Jiangbin, Du, Jiangfeng (2019-08-28). Floquet dynamical quantum phase transitions. PHYSICAL REVIEW B 100 (8). ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.100.085308
Abstract: © 2019 American Physical Society. Dynamical quantum phase transitions (DQPTs) are manifested by time-domain nonanalytic behaviors of many-body systems. Introducing a quench is so far understood as a typical scenario to induce DQPTs. In this work, we discover a type of DQPTs, termed Floquet DQPTs, as intrinsic features of time-periodic systems. Floquet DQPTs occur within each period of continuous driving, without the need for any quenches. In particular, in a harmonically driven spin chain model, we find analytically the existence of Floquet DQPTs in and only in a parameter regime hosting a certain nontrivial Floquet topological phase. The Floquet DQPTs are further characterized by a dynamical topological invariant defined as the winding number of the Pancharatnam geometric phase versus quasimomentum. These findings are experimentally demonstrated with a single spin in diamond. This work thus opens a door for future studies of DQPTs in connection with topological matter.
Source Title: PHYSICAL REVIEW B
URI: https://scholarbank.nus.edu.sg/handle/10635/168524
ISSN: 2469-9950
2469-9969
DOI: 10.1103/PhysRevB.100.085308
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