Accelerating Quantum Relaxation via Temporary Reset: A Mpemba-Inspired Approach

Abstract

Slow relaxation processes spanning widely separated timescales pose fundamental challenges for probing steady-state properties and engineering functional quantum systems, such as quantum heat engines and quantum computing devices. We introduce a protocol that enables significant acceleration of relaxation in general Markovian open quantum systems by temporarily coupling the system to a reset channel, inspired by the Mpemba effect. Crucially, this acceleration persists even when the slowest decaying Lindbladian modes form complex-conjugate pairs. Unlike previous approaches, which typically target a single mode, our protocol may suppress multiple relaxation modes simultaneously. This framework provides a versatile and experimentally feasible tool for controlling relaxation timescales, with broad implications for quantum thermodynamics, computation, and state preparation.

7+10 pages, 3+5 figures, sufficient conditions for acceleration are added. To appear in PRL

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Cited by in corpus (9)

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• Fast and direct preparation of a genuine lattice BEC via the quantum Mpemba effect
• A resource theoretical unification of Mpemba effects: classical and quantum
• Relaxation Control of Open Quantum Systems
• Quantum Pontus-Mpemba Effect Enabled by the Liouvillian Skin Effect
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