Quantumness near a Schwarzschild black holeS. Haddadi, M. A. Yurischev, M. Y. Abd-Rabbou, M. Azizi, M. R. Pourkarimi and M. GhominejadEur. Phys. J. C, 84 1 (2024) 42DOI: https://doi.org/10.1140/epjc/s10052-024-12393-6