A cook sprays water onto a hot skillet: droplets sizzle and vanish, instantly signaling the temperature — faster than waiting for a thermometer. A similar principle now works in quantum thermometry. A tiny sensor (say, an atom) is deliberately heated, and as it rushes back toward rest, the growth of entropy (disorder) as per Boltzmann’s legacy, it briefly becomes hypersensitive to the ambient temperature. The paradox: starting from a hot state accelerates cooling — exactly like the Mpemba effect, where hot water freezes faster than cold.

This is critical for quantum computers and microchips, where conventional thermal control is impossible. And the Mpemba effect itself still lacks a single explanation — scientists still debate the causes, yet it already serves as a practical tool.