Propagation of non-linear waves in hot, ideal, and non-extensive quark–gluon plasma Trambak Bhattacharyya and Abhik Mukherjee Eur. Phys. J. C, 80 7 (2020) 656 Published online: 22 July 2020 DOI: 10.1140/epjc/s10052-020-8191-4