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Researchers at Qufu Normal University have demonstrated precise control over quantum relaxation speeds by manipulating reservoir parameters to toggle a nonreciprocal Mpemba effect on and off without altering energy spectra. This structural symmetry allows for switching between bypassing slowest modes or avoiding critical slowing, offering a robust mechanism for optimizing open quantum systems near exceptional points. The work advances our understanding of how specific pathways influence equilibrium dynamics rather than just thermal rates.

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Qufu Normal University Finds Nonreciprocal Quantum Speedup

Quantum ZeitgeistJuly 30, 20263 min read

Researchers at Qufu Normal University demonstrated a nonreciprocal quantum Mpemba effect, a phenomenon where a system farther from equilibrium can relax faster than one closer to it. This effect is controlled by swapping parameters of isomorphic reservoirs coupled to an open quantum system, altering relaxation pathways without changing the system’s energy spectrum.

Researchers at Qufu Normal University, Chinese Academy of Sciences, University of Chinese Academy of Sciences, and Hefei National Laboratory have demonstrated a significant level of control over quantum relaxation speeds, revealing a nonreciprocal quantum Mpemba effect where interchanging the parameters of two identical reservoirs, a discrete operation, can turn the quantum Mpemba effect on or off without altering the initial states. This…

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