Observing the Quantum Mpemba Effect in Quantum Simulations

Joshi, Lata Kh; Franke, Johannes; Rath, Aniket; Ares, Filiberto; Murciano, Sara; Kranzl, Florian; Blatt, R.; Zoller, P.; Vermersch, Benoît; Calabrese, Pasquale; Roos, C. F.; Joshi, Manoj K.

doi:10.1103/physrevlett.133.010402

articlePhysical Review LettersJul 1, 2024Closed access

Observing the Quantum Mpemba Effect in Quantum Simulations

LKLata Kh Joshi JFJohannes Franke ARAniket Rath FAFiliberto Ares SMSara Murciano

Austrian Academy of Sciences · Scuola Internazionale Superiore di Studi Avanzati · +7 more institutions

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Abstract

The nonequilibrium physics of many-body quantum systems harbors various unconventional phenomena. In this Letter, 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…

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Topics & keywords

Topics

Keywords

Physics
Thermalisation
Quantum entanglement
Quantum
Asymmetry
Quantum mechanics
Symmetry breaking
Symmetry (geometry)

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