Initial-Slip Dynamics Enables the Quantum Mpemba Effect

• URL: http://arxiv.org/abs/2609.16781v1
• Date: Tue, 15 Sep 2026 07:50:47 GMT
• Title: Initial-Slip Dynamics Enables the Quantum Mpemba Effect
• Abstract summary: We investigate the quantum Mpemba effect, whereby a system initially farther from equilibrium relaxes faster than one initially closer to equilibrium.<n>We show that the effect is enabled by the initial-slip dynamics generated by the sudden switch-on of the system-bath interaction.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate the quantum Mpemba effect, whereby a system initially farther from equilibrium relaxes faster than one initially closer to equilibrium, emerging in a quantum harmonic oscillator linearly coupled to a bosonic environment. Starting from factorized thermal states at different temperatures, we derive exact analytical criteria for the occurrence of the quantum Mpemba effect valid also beyond the typically considered weak-coupling and Markovian approximations. Most importantly, we show that the effect is enabled by the initial-slip dynamics generated by the sudden switch-on of the system-bath interaction. Neglecting this contribution completely suppresses the anomalous relaxation, identifying transient system-bath correlations as the key ingredient underlying the quantum Mpemba effect.

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