Quantum system ascribed to the Oppenheimer–Snyder model of massive stars Andrzej Góźdź, Jan J. Ostrowski, Aleksandra Pȩdrak and Włodzimierz Piechocki Eur. Phys. J. C, 84 1 (2024) 10 Published online: 05 January 2024 DOI: 10.1140/epjc/s10052-023-12305-0