Lata Joshi, Johannes Franke, Aniket Rath, Filiberto Ares, Sara Murciano, Florian Kranzl, Rainer Blatt, Peter Zoller, Benoıt Vermersch, Pasquale Calabrese, Christian Roos and Manoj Kumar Joshi
The non-equilibrium physics of many-body quantum systems harbor various unconventional phenomena. In recent studies on thermalization following quantum quenches on specific states an interesting and puzzling phenomena has emerged — the quantum Mpemba effect. In this effect, following a quantum quench, an initially tilted ferromagnet restores its symmetry more rapidly when it is farther from a symmetric state compared to when it is closer. In this talk I will present the first experimental evidence of this effect in a trapped-ion quantum simulator. The symmetry breaking and restoration are monitored through entanglement asymmetry, probed via randomized measurements, and postprocessed using the classical shadows technique. Furthermore, a direct comparison between the late time thermal symmetric theoretical state and the experimental state offer direct evidence of subsystem thermalization.