Hotter quantum systems can cool faster than initially colder equivalents. 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 tempera
Researchers investigated the Mpemba effect in quantum systems, a phenomenon where hotter water can freeze faster than cooler water. This quantum Mpemba effect retains memory of its initial conditions, affecting its thermal relaxation later. The team used two systems with quantum dots and discovered the thermal quantum Mpemba effect across various conditions, suggesting possible broader applications beyond thermal analysis.
The Mpemba effect is a counterintuitive phenomenon where hot water can freeze faster than cold water under certain conditions. Named after Erasto Mpemba, a Tanzanian student who observed this effect in the 1960s and subsequently brought it to the attention of the scientific community, the phenomenon has been a topic of curiosity for centuries, with references dating back to the likes of Aristotle. The exact cause of the Mpemba effect is still a topic of debate among scientists.
Two systems with quantum dots connected to a heat bath, one with a current flowing and the other in an equilibrium state. The time evolution toward a steady state was followed for each. Credit: KyotoU/Hisao Hayakawa
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