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Floquet Prethermal Phase Protected by U(1) Symmetry on a Superconducting Quantum Processor

Authors :
Chong Ying
Qihao Guo
Shaowei Li
Ming Gong
Xiu-Hao Deng
Fusheng Chen
Chen Zha
Yangsen Ye
Can Wang
Qingling Zhu
Shiyu Wang
Youwei Zhao
Haoran Qian
Shaojun Guo
Yulin Wu
Hao Rong
Hui Deng
Futian Liang
Jin Lin
Yu Xu
Cheng-Zhi Peng
Chao-Yang Lu
Zhang-Qi Yin
Xiaobo Zhu
Jian-Wei Pan
Publication Year :
2021

Abstract

Periodically driven systems, or Floquet systems, exhibit many novel dynamics and interesting out-of-equilibrium phases of matter. Those phases arising with the quantum systems' symmetries, such as global $U(1)$ symmetry, can even show dynamical stability with symmetry-protection. Here we experimentally demonstrate a $U(1)$ symmetry-protected prethermal phase, via performing a digital-analog quantum simulation on a superconducting quantum processor. The dynamical stability of this phase is revealed by its robustness against external perturbations. We also find that the spin glass order parameter in this phase is stabilized by the interaction between the spins. Our work reveals a promising prospect in discovering emergent quantum dynamical phases with digital-analog quantum simulators.<br />14 pages, 4 figures, and supplementary materials

Details

Language :
English
Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....71565327cd699cb8919caaa24d49c3c7