Observation of thermalization and information scrambling in a superconducting quantum processor
Abstract
Understanding various phenomena in non-equilibrium dynamics of closed quantum many-body systems, such as quantum thermalization, information scrambling, and nonergodic dynamics, is a crucial for modern physics. Using a ladder-type superconducting quantum processor, we perform analog quantum simulations of both the ladder and one-dimensional (1D) model. By measuring the dynamics of local observables, entanglement entropy and tripartite mutual information, we signal quantum thermalization and information scrambling in the ladder. In contrast, we show that the chain, as free fermions on a 1D lattice, fails to thermalize, and local information does not scramble in the integrable channel. Our experiments reveal ergodicity and scrambling in the controllable qubit ladder, and opens the door to further investigations on the thermodynamics and chaos in quantum many-body systems.
Keywords
Cite
@article{arxiv.2101.08031,
title = {Observation of thermalization and information scrambling in a superconducting quantum processor},
author = {Qingling Zhu and Zheng-Hang Sun and Ming Gong and Fusheng Chen and Yu-Ran Zhang and Yulin Wu and Yangsen Ye and Chen Zha and Shaowei Li and Shaojun Guo and Haoran Qian and He-Liang Huang and Jiale Yu and Hui Deng and Hao Rong and Jin Lin and Yu Xu and Lihua Sun and Cheng Guo and Na Li and Futian Liang and Cheng-Zhi Peng and Heng Fan and Xiaobo Zhu and Jian-Wei Pan},
journal= {arXiv preprint arXiv:2101.08031},
year = {2022}
}
Comments
5 pages, 4 figures, and supplementary materials with 10 pages, 3 tables and 14 figures