Interplay between disorder and topology in Thouless pumping on a superconducting quantum processor
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866918029396279296 |
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| author | Liu, Yu Zhang, Yu-Ran Shi, Yun-Hao Liu, Tao Lu, Congwei Wang, Yong-Yi Li, Hao Li, Tian-Ming Deng, Cheng-Lin Zhou, Si-Yun Liu, Tong Zhang, Jia-Chi Liang, Gui-Han Mei, Zheng-Yang Ma, Wei-Guo Liu, Hao-Tian Liu, Zheng-He Chen, Chi-Tong Huang, Kaixuan Song, Xiaohui Zhao, SP Tian, Ye Xiang, Zhongcheng Zheng, Dongning Nori, Franco Xu, Kai Fan, Heng |
| author_facet | Liu, Yu Zhang, Yu-Ran Shi, Yun-Hao Liu, Tao Lu, Congwei Wang, Yong-Yi Li, Hao Li, Tian-Ming Deng, Cheng-Lin Zhou, Si-Yun Liu, Tong Zhang, Jia-Chi Liang, Gui-Han Mei, Zheng-Yang Ma, Wei-Guo Liu, Hao-Tian Liu, Zheng-He Chen, Chi-Tong Huang, Kaixuan Song, Xiaohui Zhao, SP Tian, Ye Xiang, Zhongcheng Zheng, Dongning Nori, Franco Xu, Kai Fan, Heng |
| contents | Topological phases are robust against weak perturbations, but break down when disorder becomes sufficiently strong. However, moderate disorder can also induce topologically nontrivial phases. Thouless pumping, as a (1+1)D counterpart of the integer quantum Hall effect, is one of the simplest manifestations of topology. Here, we report experimental observations of the competition and interplay between Thouless pumping and disorder on a 41-qubit superconducting quantum processor. We improve 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. In particular, 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_01530 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Interplay between disorder and topology in Thouless pumping on a superconducting quantum processor Liu, Yu Zhang, Yu-Ran Shi, Yun-Hao Liu, Tao Lu, Congwei Wang, Yong-Yi Li, Hao Li, Tian-Ming Deng, Cheng-Lin Zhou, Si-Yun Liu, Tong Zhang, Jia-Chi Liang, Gui-Han Mei, Zheng-Yang Ma, Wei-Guo Liu, Hao-Tian Liu, Zheng-He Chen, Chi-Tong Huang, Kaixuan Song, Xiaohui Zhao, SP Tian, Ye Xiang, Zhongcheng Zheng, Dongning Nori, Franco Xu, Kai Fan, Heng Quantum Physics Topological phases are robust against weak perturbations, but break down when disorder becomes sufficiently strong. However, moderate disorder can also induce topologically nontrivial phases. Thouless pumping, as a (1+1)D counterpart of the integer quantum Hall effect, is one of the simplest manifestations of topology. Here, we report experimental observations of the competition and interplay between Thouless pumping and disorder on a 41-qubit superconducting quantum processor. We improve 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. In particular, 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. |
| title | Interplay between disorder and topology in Thouless pumping on a superconducting quantum processor |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2401.01530 |