Experimental observation and application of the genuine Quantum Mpemba Effect

• URL: http://arxiv.org/abs/2511.14552v1
• Date: Tue, 18 Nov 2025 14:55:13 GMT
• Title: Experimental observation and application of the genuine Quantum Mpemba Effect
• Authors: Bruno P. Schnepper, Jefferson L. D. de Oliveira, Carlos H. S. Vieira, Krissia Zawadzki, Roberto M. Serra,
• Abstract summary: We experimentally investigate the quantum Mpemba effect (QME), in which a system can exhibit anomalous relaxation, thermalizing faster from a state initially farther from equilibrium than from one closer.<n>We apply the QME in a quantum Otto refrigerator, thereby increasing its cooling power.<n>This proof-of-concept experiment unveils new practical paths for improving quantum thermal tasks.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Coherence is an inherently quantum property that deeply affects microscopic processes, including thermalization phenomena. A striking example is the quantum Mpemba effect (QME), in which a system can exhibit anomalous relaxation, thermalizing faster from a state initially farther from equilibrium than from one closer. Here, we experimentally investigate the genuine QME and observe how the dynamics of a spin-1/2 system interacting with a heat sink can be sped-up to equilibrium. Furthermore, we apply the QME in a quantum Otto refrigerator, thereby increasing its cooling power. This proof-of-concept experiment unveils new practical paths for improving quantum thermal tasks.

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