Exploring Hilbert-Space Fragmentation on a Superconducting Processor
Isolated interacting quantum systems generally thermalize, yet there are several examples for the breakdown of ergodicity, such as many-body localization and quantum scars. Recently, ergodicity breaking has been observed in systems subjected to linear potentials, termed Stark many-body localization....
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-02-01
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| Series: | PRX Quantum |
| Online Access: | http://doi.org/10.1103/PRXQuantum.6.010325 |
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| author | Yong-Yi Wang Yun-Hao Shi Zheng-Hang Sun Chi-Tong Chen Zheng-An Wang Kui Zhao Hao-Tian Liu Wei-Guo Ma Ziting Wang Hao Li Jia-Chi Zhang Yu Liu Cheng-Lin Deng Tian-Ming Li Yang He Zheng-He Liu Zhen-Yu Peng Xiaohui Song Guangming Xue Haifeng Yu Kaixuan Huang Zhongcheng Xiang Dongning Zheng Kai Xu Heng Fan |
| author_facet | Yong-Yi Wang Yun-Hao Shi Zheng-Hang Sun Chi-Tong Chen Zheng-An Wang Kui Zhao Hao-Tian Liu Wei-Guo Ma Ziting Wang Hao Li Jia-Chi Zhang Yu Liu Cheng-Lin Deng Tian-Ming Li Yang He Zheng-He Liu Zhen-Yu Peng Xiaohui Song Guangming Xue Haifeng Yu Kaixuan Huang Zhongcheng Xiang Dongning Zheng Kai Xu Heng Fan |
| author_sort | Yong-Yi Wang |
| collection | DOAJ |
| description | Isolated interacting quantum systems generally thermalize, yet there are several examples for the breakdown of ergodicity, such as many-body localization and quantum scars. Recently, ergodicity breaking has been observed in systems subjected to linear potentials, termed Stark many-body localization. This phenomenon is closely associated with Hilbert-space fragmentation, characterized by a strong dependence of dynamics on initial conditions. Here, we explore initial-state-dependent dynamics using a ladder-type superconducting processor with up to 24 qubits, which enables precise control of the qubit frequency and initial-state preparation. In systems with linear potentials, we experimentally observe distinct nonequilibrium dynamics for initial states with the same quantum numbers and energy, but with varying domain-wall numbers. Accompanied by the numerical simulation for systems with larger sizes, we reveal that this distinction becomes increasingly pronounced as the system size grows, in contrast with weakly disordered interacting systems. Our results provide convincing experimental evidence of the fragmentation in Stark systems, enriching our understanding of the weak breakdown of ergodicity. |
| format | Article |
| id | doaj-art-510eb6d2a17d492a82ff5d2f650f6786 |
| institution | Kabale University |
| issn | 2691-3399 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | PRX Quantum |
| spelling | doaj-art-510eb6d2a17d492a82ff5d2f650f67862025-02-07T15:01:03ZengAmerican Physical SocietyPRX Quantum2691-33992025-02-016101032510.1103/PRXQuantum.6.010325Exploring Hilbert-Space Fragmentation on a Superconducting ProcessorYong-Yi WangYun-Hao ShiZheng-Hang SunChi-Tong ChenZheng-An WangKui ZhaoHao-Tian LiuWei-Guo MaZiting WangHao LiJia-Chi ZhangYu LiuCheng-Lin DengTian-Ming LiYang HeZheng-He LiuZhen-Yu PengXiaohui SongGuangming XueHaifeng YuKaixuan HuangZhongcheng XiangDongning ZhengKai XuHeng FanIsolated interacting quantum systems generally thermalize, yet there are several examples for the breakdown of ergodicity, such as many-body localization and quantum scars. Recently, ergodicity breaking has been observed in systems subjected to linear potentials, termed Stark many-body localization. This phenomenon is closely associated with Hilbert-space fragmentation, characterized by a strong dependence of dynamics on initial conditions. Here, we explore initial-state-dependent dynamics using a ladder-type superconducting processor with up to 24 qubits, which enables precise control of the qubit frequency and initial-state preparation. In systems with linear potentials, we experimentally observe distinct nonequilibrium dynamics for initial states with the same quantum numbers and energy, but with varying domain-wall numbers. Accompanied by the numerical simulation for systems with larger sizes, we reveal that this distinction becomes increasingly pronounced as the system size grows, in contrast with weakly disordered interacting systems. Our results provide convincing experimental evidence of the fragmentation in Stark systems, enriching our understanding of the weak breakdown of ergodicity.http://doi.org/10.1103/PRXQuantum.6.010325 |
| spellingShingle | Yong-Yi Wang Yun-Hao Shi Zheng-Hang Sun Chi-Tong Chen Zheng-An Wang Kui Zhao Hao-Tian Liu Wei-Guo Ma Ziting Wang Hao Li Jia-Chi Zhang Yu Liu Cheng-Lin Deng Tian-Ming Li Yang He Zheng-He Liu Zhen-Yu Peng Xiaohui Song Guangming Xue Haifeng Yu Kaixuan Huang Zhongcheng Xiang Dongning Zheng Kai Xu Heng Fan Exploring Hilbert-Space Fragmentation on a Superconducting Processor PRX Quantum |
| title | Exploring Hilbert-Space Fragmentation on a Superconducting Processor |
| title_full | Exploring Hilbert-Space Fragmentation on a Superconducting Processor |
| title_fullStr | Exploring Hilbert-Space Fragmentation on a Superconducting Processor |
| title_full_unstemmed | Exploring Hilbert-Space Fragmentation on a Superconducting Processor |
| title_short | Exploring Hilbert-Space Fragmentation on a Superconducting Processor |
| title_sort | exploring hilbert space fragmentation on a superconducting processor |
| url | http://doi.org/10.1103/PRXQuantum.6.010325 |
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