We introduce quantum heat engines that perform Otto cycle and the Stirling by using a coupled pair of harmonic oscillator as its working substance. In regime, different medium is considered for analysis engine models to boost efficiency cycles. this work, we present in realm where phase space non-commutative nature. By notion thermodynamics, develop thermodynamic variables space. encounter cata...

On condition of dichotomy, it is pointed out that in Lorenz and a kind of Rössler-like system chaotic attractors or limit cycles will disappear if nonlinearity of the product of two variables is replaced by some single variable nonlinearity, for example, nonlinearity of Chua’s circuit. Furthermore, an extended Chua’s circuit with two nonlinear functions is presented. By computer simulation it i...

To reveal the role of quantumness in Otto cycle and to discuss validity thermodynamic uncertainty relation (TUR) cycle, we study quantum its classical counterpart. In particular, calculate exactly mean values relative error quantities. quasistatic limit, reduces productivity precision compared that absence quantumness, whereas finite-time mode, it can increase cycle's precision. Interestingly, ...

We analyze the efficiency of quantum Otto cycle applied to a superconducting cavity. consider its description in terms full scalar field one-dimensional cavity with time dependent boundary condition that can be externally controlled perform and extract work unitarily from system. study performance this machine when acting as heat engine well refrigerator. It is shown that, non-adiabatic regime,...