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Observing the quantum Mpemba effect in quantum simulations

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arxiv 2401.04270 v2 pith:YFJSGMLQ submitted 2024-01-08 quant-ph cond-mat.stat-mech

Lata Kh Joshi , Johannes Franke , Aniket Rath , Filiberto Ares , Sara Murciano , Florian Kranzl , Rainer Blatt , Peter Zoller
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Benoît Vermersch Pasquale Calabrese Christian F. Roos Manoj K. Joshi
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classification quant-phcond-mat.stat-mech
keywords quantumeffectstateevidenceexperimentalmpembaphenomenasymmetric
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The non-equilibrium physics of many-body quantum systems harbors various unconventional phenomena. In this study, we experimentally investigate one of the most puzzling of these phenomena -- the quantum Mpemba effect, where a tilted ferromagnet restores its symmetry more rapidly when it is farther from the symmetric state compared to when it is closer. We present the first experimental evidence of the occurrence 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. Our findings are further substantiated by measuring the Frobenius distance between the experimental state and the stationary thermal symmetric theoretical state, offering direct evidence of subsystem thermalization.

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Cited by 5 Pith papers

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  2. Boundary quenches in (1+1)-dimensional conformal field theory

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