Finite-time performance of a single-ion quantum Otto engine
arXiv:2106.06700 · doi:10.1103/PhysRevE.103.032144
Abstract
We study how a quantum heat engine based on a single trapped ion performs in finite time. The always-on thermal environment acts like the hot bath, while the motional degree of freedom of the ion plays the role of the effective cold bath. The hot isochoric stroke is implemented via the interaction of the ion with its hot environment, while a projective measurement of the internal state of the ion is performed as an equivalent to the cold isochoric stroke. The expansion and compression strokes are implemented via suitable change in applied magnetic field. We study in detail how the finite duration of each stroke affects the engine performance. We show that partial thermalization can in fact enhance the efficiency of the engine, due to the residual coherence, whereas faster expansion and compression strokes increase the inner friction and therefore reduce the efficiency.
10 pages, 7 figures
References in corpus (14)
- Single ion heat engine with maximum efficiency at maximum power
- Second Law of Thermodynamics with Discrete Quantum Feedback Control
- Generalized Clausius inequality for nonequilibrium quantum processes
- Thermodynamical Control by Frequent Quantum Measurements
- Irreversible work and inner friction in quantum thermodynamic processes
- Minimal universal quantum heat machine
- Quantum Performance of Thermal Machines over Many Cycles
- Quantum correlated heat engine with nonlinear spin-spin interactions
- Nonadiabatic single-qubit quantum Otto engine
- Quantum Otto cycle with inner friction: finite-time and disorder effects
- Non-Markov Enhancement of Maximum Power for Quantum Thermal Machines
- Measurement-induced operation of two-ion quantum heat machines
- Efficiency at maximum power of a quantum Otto engine: Both within finite-time and irreversible thermodynamics
- Finite-time quantum Otto engine: Surpassing the quasi-static efficiency due to friction