In this poster we addressed a finite time working quantum Otto cycle. The working substance of this cycle is characterized by non interacting disordered qubits. If we think at qubits as spins in a magnetic field, "disorder" refers to a random misalignment between the single spins and the direction of the external field. Such field drives, in a finite time, the adiabatic branches. On the other hand the isochoric transformations are assumed to be two thermalizations at different temperature T_c and T_h. Power, net work, efficiency and efficiency at maximum power are obtained, according to different choices of T_c/T_h and of the misalignment probability distribution across the substance. Such probability distributions are assumed to be Gaussian with mean values, for the misalignment, equal to zero.
Quantum Otto Cycle with Inner Friction
ALECCE, ANTONIO;LO GULLO, NICOLINO;DELL'ANNA, LUCA
2015
Abstract
In this poster we addressed a finite time working quantum Otto cycle. The working substance of this cycle is characterized by non interacting disordered qubits. If we think at qubits as spins in a magnetic field, "disorder" refers to a random misalignment between the single spins and the direction of the external field. Such field drives, in a finite time, the adiabatic branches. On the other hand the isochoric transformations are assumed to be two thermalizations at different temperature T_c and T_h. Power, net work, efficiency and efficiency at maximum power are obtained, according to different choices of T_c/T_h and of the misalignment probability distribution across the substance. Such probability distributions are assumed to be Gaussian with mean values, for the misalignment, equal to zero.Pubblicazioni consigliate
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