Error-resilient Reversal of Quantum Chaotic Dynamics Enabled by Scramblons

Drawing inspiration from gravity and solvable SYK-type models, recent developments in the study of information scrambling have identified the scramblon, a novel collective excitation in quantum many-body systems with all-to-all connectivity, as the fundamental carrier of scrambling dynamics. In this talk, I will present our recent collaboration with the experimental group at USTC, demonstrating the validity of scramblon theory in a solid-state NMR system. Crucially, this enables us to isolate and mitigate errors in the OTOC caused by imperfections in the backward evolution, which uncovers the anticipated exponential behavior of quantum many-body chaos and extracts the quantum Lyapunov exponent in a many-body experimental system for the first time. I will also present our further theoretical proposal for distinguishing coherent and incoherent errors using multi-round time-reversed dynamics.