Optimization of Asymmetric Quantum Otto Engine Cycles
arXiv:2204.04782 · doi:10.1103/PhysRevE.106.024123
Abstract
We consider the optimization of the work output and fluctuations of a finite-time quantum Otto heat engine cycle consisting of compression and expansion work strokes of unequal duration. The asymmetry of the cycle is characterized by a parameter giving the ratio of the times for the compression and expansion work strokes. For such an asymmetric quantum Otto engine cycle, with working substance chosen as a harmonic oscillator or a two-level system, we find that the optimal values of maximising the work output and the reliability (defined as the ratio of average work output to its standard deviation) shows discontinuities as a function of the total time taken for the cycle. Moreover we identify cycles of some specific duration where both the work output and the reliability take their largest values for the same value of the asymmetry parameter .
arXiv comment11 pages, 6 figures
References in corpus (37)
- Thermodynamic uncertainty relation for biomolecular processes
- Quantum Thermodynamics
- Quantum Thermodynamic Cycles and quantum heat engines
- Dissipation bounds all steady-state current fluctuations
- Single ion heat engine with maximum efficiency at maximum power
- Universal trade-off between power, efficiency, and constancy in steady-state heat engines
- The quantum harmonic Otto cycle
- Irreversible Performance of a Quantum Harmonic Heat Engine
- Performance of discrete heat engines and heat pumps in finite time
- Quantum thermodynamic devices: from theoretical proposals to experimental reality
- Thermodynamic uncertainty relations from exchange fluctuation theorems
- Quantum thermal machines and batteries
- Nonequilibrium work distribution of a quantum harmonic oscillator
- Irreversible work and inner friction in quantum thermodynamic processes
- Slow dynamics and thermodynamics of open quantum systems
- Otto refrigerator based on a superconducting qubit: classical and quantum performance
- Carnot Cycle at Finite Power: Attainability of Maximal Efficiency
- Characteristics of the Limit Cycle of a Reciprocating Quantum Heat Engine
- Optimal cycles for low-dissipation heat engines
- Identifying optimal cycles in quantum thermal machines with reinforcement-learning
- Measurement driven single temperature engine
- Quantum Signatures in the Quantum Carnot Cycle
- Efficiency fluctuations of a quantum Otto engine
- Quantum Otto cycle with inner friction: finite-time and disorder effects
- Many-body quantum thermal machines
- Universal Bounds on Fluctuations in Continuous Thermal Machines
- Quantum finite-time thermodynamics: insight from a single qubit engine
- A quantum enhanced finite-time Otto cycle
- Occurrence of discontinuities in the performance of finite-time quantum Otto cycles
- Optimal control of quantum thermal machines using machine learning
- Boosting the performance of the Quantum Otto heat engines
- Geometric optimization of non-equilibrium adiabatic thermal machines and implementation in a qubit system
- Bounds on fluctuations for finite-time quantum Otto cycle
- Efficiency statistics of a quantum Otto cycle
- Maximum power heat engines and refrigerators in the fast-driving regime
- Thermodynamic uncertainty relation for energy transport in transient regime -- Model study
- Learning the best thermoelectric nanoscale heat engines through evolving network topology