Probing spin hydrodynamics on a superconducting quantum simulator

• DOI: 10.48550/arxiv.2310.06565
• Publication Date: 2023-01-01
• Authors: Yun‐Hao Shi; Zheng‐Hang Sun; Yongyi Wang; Zheng‐An Wang; Yu-Ran Zhang; Wei‐Guo Ma; Hao-Tian Liu; Kui Zhao; Jiacheng Song; Gui-Han Liang; Zheng-Yang Mei; Jiachi Zhang; Hao Li; Chi-Tong Chen; Xiaohui Song; Jieci Wang; Guangming Xue; Haifeng Yu; Kaixuan Huang; Zhongcheng Xiang; Kai Xu; Dongning Zheng; Heng Fan
• Keywords: Thermalisation; Quantum thermodynamics; Transport phenomena

Characterizing the nature of hydrodynamical transport properties in quantum dynamics provides valuable insights into fundamental understanding exotic non-equilibrium phases matter. Simulating infinite-temperature on large-scale complex systems remains an outstanding challenge. Here, using a controllable and coherent superconducting simulator, we experimentally realize analog circuit, which can efficiently prepare Haar-random states, probe spin at infinite temperature. We observe diffusive during unitary evolution ladder-type simulator with ergodic dynamics. Moreover, explore subjected to strong disorder or titled potential, revealing signatures anomalous subdiffusion accompany breakdown thermalization. Our work demonstrates scalable method probing simulators, paves way study other intriguing out-of-equilibrium phenomena from perspective transport.