A superconducting quantum simulator based on a photonic-bandgap metamaterial

• 成果类型: Article
• 署名作者: Zhang, Xueyue; Kim, Eunjong; Mark, Daniel K.; Choi, Soonwon; Painter, Oskar
• 署名单位: California Institute of Technology; California Institute of Technology; California Institute of Technology; Massachusetts Institute of Technology (MIT)
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9713
• DOI: 10.1126/science.ade7651
• 发表日期: 2023-01-20
• 页码: 278-283
• 关键词: range interactions; entanglement; propagation; phases

摘要

Synthesizing many-body quantum systems with various ranges of interactions facilitates the study of quantum chaotic dynamics. Such extended interaction range can be enabled by using nonlocal degrees of freedom such as photonic modes in an otherwise locally connected structure. Here, we present a superconducting quantum simulator in which qubits are connected through an extensible photonic-bandgap metamaterial, thus realizing a one-dimensional Bose-Hubbard model with tunable hopping range and on-site interaction. Using individual site control and readout, we characterize the statistics of measurement outcomes from many-body quench dynamics, which enables in situ Hamiltonian learning. Further, the outcome statistics reveal the effect of increased hopping range, showing the predicted crossover from integrability to ergodicity. Our work enables the study of emergent randomness from chaotic many-body evolution and, more broadly, expands the accessible Hamiltonians for quantum simulation using superconducting circuits.