Does hot water freeze faster than cold water? Aristotle may have been the first to tackle this question that later became known as the Mpemba effect.
This phenomenon originally referred to the non-monotonic initial temperature dependence of the freezing start time, but it has been observed in various systems—including colloids—and has also become known as a mysterious relaxation phenomenon that depends on initial conditions.
Now, a team of researchers from Kyoto University and the Tokyo University of Agriculture and Technology has shown that the temperature quantum Mpemba effect can be realized over a wide range of initial conditions."The quantum Mpemba effect bears the memory of initial conditions that result in anomalous thermal relaxation at later times," explains project leader and co-author Hisao Hayakawa at KyotoU's Yukawa Institute for Theoretical Physics.
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