Work and efficiency of quantum Otto heat engines (QOHEs) can increase by using non-thermal baths or by inhomogeneousscaling of energy levels of the working substance. Given these points, at first, we construct the coherent thermal state for atrigonometric Pöschl-Teller (PT) potential. Then using a particle in this potential, which has unequally spaced energy levels,as a working substance, we investigate the work extraction and the efficiency of QOHEs that operates between cold and hotcoherent thermal baths. The results show that changing the PT potential parameters in the adiabatic processes of QOHE,which causes an inhomogeneous shift in energy levels or/and make use of the hot coherent thermal bath, improve workextraction and efficiency of QOHE relative to the classical counterpart.

Work and efficiency of quantum Otto heat engines (QOHEs) can increase by using non-thermal baths or by inhomogeneous scaling of energy levels of the working substance. Given these points, at first, we construct the coherent thermal state for a trigonometric Pöschl–Teller (PT) potential. Then using a particle in this potential, which has unequally spaced energy levels, as a working substance, we investigate the work extraction and the efficiency of QOHEs that operates between cold and hot coherent thermal baths. The results show that changing the PT potential parameters in the adiabatic processes of QOHE, which causes an inhomogeneous shift in energy levels or/and make use of the hot coherent thermal bath, improve work extraction and efficiency of QOHE relative to the classical counterpart.