Disorder-induced topological pumping on a superconducting quantum
processor
- URL: http://arxiv.org/abs/2401.01530v1
- Date: Wed, 3 Jan 2024 03:57:54 GMT
- Title: Disorder-induced topological pumping on a superconducting quantum
processor
- Authors: Yu Liu, Yu-Ran Zhang, Yun-Hao Shi, Tao Liu, Congwei Lu, Yong-Yi Wang,
Hao Li, Tian-Ming Li, Cheng-Lin Deng, Si-Yun Zhou, Tong Liu, Jia-Chi Zhang,
Gui-Han Liang, Zheng-Yang Mei, Wei-Guo Ma, Hao-Tian Liu, Zheng-He Liu,
Chi-Tong Chen, Kaixuan Huang, Xiaohui Song, SP Zhao, Ye Tian, Zhongcheng
Xiang, Dongning Zheng, Franco Nori, Kai Xu, Heng Fan
- Abstract summary: Thouless pumping represents the quantized charge pumped during an adiabatic cyclic evolution.
With a 41-qubit superconducting quantum processor, we develop a Floquet engineering technique to realize cycles of adiabatic pumping.
We observe Thouless pumping in the presence of disorder and show its breakdown as the strength of disorder increases.
- Score: 22.437412238586404
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Thouless pumping, a dynamical version of the integer quantum Hall effect,
represents the quantized charge pumped during an adiabatic cyclic evolution.
Here we report experimental observations of nontrivial topological pumping that
is induced by disorder even during a topologically trivial pumping trajectory.
With a 41-qubit superconducting quantum processor, we develop a Floquet
engineering technique to realize cycles of adiabatic pumping by simultaneously
varying the on-site potentials and the hopping couplings. We demonstrate
Thouless pumping in the presence of disorder and show its breakdown as the
strength of disorder increases. Moreover, we observe two types of topological
pumping that are induced by on-site potential disorder and hopping disorder,
respectively. Especially, an intrinsic topological pump that is induced by
quasi-periodic hopping disorder has never been experimentally realized before.
Our highly controllable system provides a valuable quantum simulating platform
for studying various aspects of topological physics in the presence of
disorder.
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