  In this work an example of a cyclic engine based on a quantum-mechanical
properties of the strongly non linear quantum oscillator described by the
Poschl-Teller [PT] model is examined. Using the [PT] model as shown in our
earlier works [1-4], a quantum-mechanical analog of Carnot cycle (i.e quantum
heat engine) has been constructed through the changes of both, the width L of
the well and its quantum state. This quantum heat engine has a cycle consisting
of adiabatic and isothermal quantum processes. The efficiency of the quantum
engine based on the Poschl-Teller-like potential is derived and it is analogous
to classical thermodynamic engines.
