Our team answers this question with a resounding yes. In the journal Nature, physicists from the University of Vienna and the University of Duisburg-Essen show that even massive nanoparticles consisting of thousands of sodium atoms follow the rules of quantum mechanics. The experiment is currently one of the best tests of quantum mechanics on a macroscopic scale.
Press release: https://www.univie.ac.at/en/news/press-room/press-releases/detail/metal-clumps-in-quantum-state-vienna-research-team-breaks-records
Original publication:
Pedalino, S., Ramírez-Galindo, B.E., Ferstl, R., Hornberger, K., Arndt, M. and Gerlich, S. 'Probing quantum mechanics with nanoparticle matter-wave interferometry', Nature (2025)
DOI: 10.1038/s41586-025-09917-9
