Observation of strong and weak thermalization in a superconducting quantum processor

• URL: http://arxiv.org/abs/2102.08587v1
• Date: Wed, 17 Feb 2021 05:48:29 GMT
• Title: Observation of strong and weak thermalization in a superconducting quantum processor
• Authors: Fusheng Chen, Zheng-Hang Sun, Ming Gong, Qingling Zhu, Yu-Ran Zhang, Yulin Wu, Yangsen Ye, Chen Zha, Shaowei Li, Shaojun Guo, Haoran Qian, He-Liang Huang, Jiale Yu, Hui Deng, Hao Rong, Jin Lin, Yu Xu, Lihua Sun, Cheng Guo, Na Li, Futian Liang, Cheng-Zhi Peng, Heng Fan, Xiaobo Zhu, and Jian-Wei Pan
• Abstract summary: We study the ergodic dynamics of a 1D array of 12 superconducting qubits with a transverse field. We identify the regimes of strong and weak thermalization with different initial states.
• Score: 24.685988382662803
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We experimentally study the ergodic dynamics of a 1D array of 12 superconducting qubits with a transverse field, and identify the regimes of strong and weak thermalization with different initial states. We observe convergence of the local observable to its thermal expectation value in the strong-thermalizaion regime. For weak thermalization, the dynamics of local observable exhibits an oscillation around the thermal value, which can only be attained by the time average. We also demonstrate that the entanglement entropy and concurrence can characterize the regimes of strong and weak thermalization. Our work provides an essential step towards a generic understanding of thermalization in quantum systems.

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