A quantum Carnot engine is one in which the atoms in the heat bath are given a small bit of quantum coherence. The phase of the atomic coherence provides a new control parameter.
The deep physics behind the second law of thermodynamics is not violated; nevertheless, the quantum Carnot engine has certain features that are not possible in a classical engine.
Publication No. WO/2009/097698 Published on Aug. 13, Canadian Inventor Develops Carnot Engine Cycle External Modification Method
Aug 14, 2009; GENEVA, Aug. 14 -- Robert Thiessen, Canada, has developed a method of externally modifying a carnot engine cycle. According to an...