Observation of thermalization and information scrambling in a superconducting quantum processor
arXiv:2101.08031 · doi:10.1103/PhysRevLett.128.160502
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.
arXiv comment5 pages, 4 figures, and supplementary materials with 10 pages, 3 tables and 14 figures
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