Impact of nonideal cycles on the efficiency of quantum heat engines Mehdi Ramezani, Stefano Marcantoni, Fabio Benatti, Roberto Floreanini, Francesco Petiziol, Ali T. Rezakhani and Mehdi Golshani Eur. Phys. J. D, 73 7 (2019) 144 Published online: 18 July 2019 DOI: 10.1140/epjd/e2019-90520-7