Collapses and revivals of entanglement in phase space in an optomechanical cavity J. Rodríguez-Lima and L. M. Arévalo Aguilar Eur. Phys. J. Plus, 135 5 (2020) 423 Published online: 19 May 2020 DOI: 10.1140/epjp/s13360-020-00401-z