Quantum correlated heat engine with nonlinear spin-spin interactions

Abstract

We propose a four level quantum heat engine in Otto cycle with a working substance of two spins subject to an external magnetic field and coupled to each other by a one-axis twisting spin squeezing nonlinear interaction. We calculate the positive work and the efficiency of the engine for different parameter regimes. In particular, we investigate the effects of quantum correlations at the end of the two isochoric processes of the Otto cycle, as measured by the entanglement of formation and quantum discord, on the work extraction and efficiency. The regimes where the quantum correlations could enhance the efficiency and work extraction are characterized.

8 pages, 5 figures

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Cited by in corpus (8)

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• A quantum heat engine with coupled superconducting resonators
• Role of quantum correlations in light-matter quantum heat engines
• Measurement-induced operation of two-ion quantum heat machines
• Energetic and entropic effects of bath-induced coherences
• Finite-time performance of a single-ion quantum Otto engine
• Measurement-based quantum Otto engine with a two-spin system coupled by anisotropic interaction: enhanced efficiency at finite times
• Finite-time two-spin quantum Otto engines: shortcuts to adiabaticity vs. irreversibility