Two coupled double quantum-dot systems as a working substance for heat machines

This paper presents a conceptual design for quantum heat machines using pair of coupled double dots (DQDs), each DQD with an excess electron to interact, as working substance. We define compression ratio the between Coulomb couplings which describes interaction electrons during isochoric processes Otto cycle and then we analyse arising different regimes operations our thermal machine. also show how can achieve classically inconceivable engine, when considering effects due parameters related tunneling single individual DQD.