Quantum Physics2025-11-191 minarXiv:2511.15492expressA Shivering Disk Cooled to Quantum StillnessCooled nearly to absolute zero with liquid helium, the semiconductor disk reached such a low level of entropy that its thermal trembling became less than one phonon — a quantum of sound.Andrea Barbero·Samuel Pautrel·Bertrand Evrard·Jérémy Bon·Romain Dezert·Aristide Lemaître·Adrien Borne·Ivan Faveroquantum Hall effectKlaus von Klitzingphononspectroscopy👍👎☆SimplePopularAdvanced