2021/02/17 by Fusheng Chen, Zheng-Hang Sun, Zheng‐Hang Sun +23
Computer Science · Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Concurrence #Ergodic theory #Mathematics #Neural Networks and Reservoir Computing #Observable #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum many-body systems #Quantum mechanics #Qubit #Statistical physics #Superconductivity #Thermal #Thermalisation #quant-ph
paper · pdf · doi:10.1103/physrevlett.127.020602
published as Phys. Rev. Lett. 127, 020602 (2021) · 6+6 pages, 4+8 figures
arxiv created 2021/02/17 · openalex publication_date 2021/07/09 · arxiv updated 2021/07/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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 toward a generic understanding of thermalization in quantum systems.