Numerical analysis of a two-qubit XYZ Heisenberg quantum Otto engine shows that reduced longitudinal coupling and optimized anisotropy improve net work and efficiency, with concurrence changes between isomagnetic strokes correlating to efficiency gains.
Kosloff, Entropy 15, 2100 (2013)
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Quantum Otto engine powered by an anisotropic Heisenberg XYZ model under independent local magnetic fields
Numerical analysis of a two-qubit XYZ Heisenberg quantum Otto engine shows that reduced longitudinal coupling and optimized anisotropy improve net work and efficiency, with concurrence changes between isomagnetic strokes correlating to efficiency gains.