Quantum Physics2026-08-052 minarXiv:2608.04696expressHow to Tell if a Particle Plays by the Rules of HeatDrop an ice cube into a glass of water — within a minute it melts, and the temperature evens out. That's thermal equilibrium in action: energy spreads evenly, and the system "forgets" its past.Zhouhao Guo·Jiaju ZhangAlan GuthAlbert EinsteinAlexei Kitaevquantum thermodynamicsquantum measuremententropytemperature👍👎☆SimplePopularAdvanced