@article{6784527b488348018aab4c07c0bcc5d1,
title = "Many-body Hilbert space scarring on a superconducting processor",
abstract = "Quantum many-body scarring (QMBS) is a recently discovered form of weak ergodicity breaking in strongly interacting quantum systems, which presents opportunities for mitigating thermalization-induced decoherence in quantum information processing applications. However, the existing experimental realizations of QMBS are based on systems with specific kinetic constrains. Here we experimentally realize a distinct kind of QMBS by approximately decoupling a part of the many-body Hilbert space in the computational basis. Utilizing a programmable superconducting processor with 30 qubits and tunable couplings, we realize Hilbert space scarring in a non-constrained model in different geometries, including a linear chain and quasi-one-dimensional comb geometry. By reconstructing the full quantum state through quantum state tomography on four-qubit subsystems, we provide strong evidence for QMBS states by measuring qubit population dynamics, quantum fidelity and entanglement entropy after a quench from initial unentangled states. Our experimental findings broaden the realm of scarring mechanisms and identify correlations in QMBS states for quantum technology applications.",
author = "Pengfei Zhang and Hang Dong and Yu Gao and Liangtian Zhao and Jie Hao and Desaules, {Jean Yves} and Qiujiang Guo and Jiachen Chen and Jinfeng Deng and Bobo Liu and Wenhui Ren and Yunyan Yao and Xu Zhang and Shibo Xu and Ke Wang and Feitong Jin and Xuhao Zhu and Bing Zhang and Hekang Li and Chao Song and Zhen Wang and Fangli Liu and Zlatko Papi{\'c} and Lei Ying and H. Wang and Lai, {Ying Cheng}",
note = "Funding Information: The device was fabricated at the Micro-Nano Fabrication Center of Zhejiang University. We acknowledge support from the National Natural Science Foundation of China (grant nos. 92065204, U20A2076, 11725419 and 12174342), the National Basic Research Program of China (grant no. 2017YFA0304300) and the Zhejiang Province Key Research and Development Program (grant no. 2020C01019). The work at Arizona State University is supported by AFOSR through grant no. FA9550-21-1-0186. Z.P. and J.Y.D. acknowledge support by EPSRC grants EP/R020612/1 and EP/R513258/1, and by Leverhulme Trust Research Leadership Award RL-2019-015. L.Y. is also supported by the Fundamental Research Funds for the Central Universities. Funding Information: The device was fabricated at the Micro-Nano Fabrication Center of Zhejiang University. We acknowledge support from the National Natural Science Foundation of China (grant nos. 92065204, U20A2076, 11725419 and 12174342), the National Basic Research Program of China (grant no. 2017YFA0304300) and the Zhejiang Province Key Research and Development Program (grant no. 2020C01019). The work at Arizona State University is supported by AFOSR through grant no. FA9550-21-1-0186. Z.P. and J.Y.D. acknowledge support by EPSRC grants EP/R020612/1 and EP/R513258/1, and by Leverhulme Trust Research Leadership Award RL-2019-015. L.Y. is also supported by the Fundamental Research Funds for the Central Universities. Publisher Copyright: {\textcopyright} 2022, The Author(s), under exclusive licence to Springer Nature Limited.",
year = "2023",
month = jan,
doi = "10.1038/s41567-022-01784-9",
language = "English (US)",
volume = "19",
pages = "120--125",
journal = "Nature Physics",
issn = "1745-2473",
publisher = "Nature Publishing Group",
number = "1",
}