Quantifying quantum correlations in a double cavity–magnon system Abdelkader Hidki, Abderrahim Lakhfif, Jamal El Qars and Mostafa Nassik Eur. Phys. J. D, 76 4 (2022) 64 Published online: 02 April 2022 DOI: 10.1140/epjd/s10053-022-00377-8