Power fluctuations in a finite-time quantum Carnot engine
arXiv:2007.01034 · doi:10.1103/PhysRevResearch.3.L032041
Abstract
Stability is an important property of small thermal machines with fluctuating power output. We here consider a finite-time quantum Carnot engine based on a degenerate multilevel system and study the influence of its finite Hilbert space structure on its stability. We optimize in particular its relative work fluctuations with respect to level degeneracy and level number. We find that its optimal performance may surpass those of nondegenerate two-level engines or harmonic oscillator motors. Our results show how to realize high-performance, high-stability cyclic quantum heat engines.
8 pages, 3 figures
References in corpus (10)
- Quantum Thermodynamic Cycles and quantum heat engines
- Fluctuation theorems: Work is not an observable
- Magnetothermal properties of molecule-based materials
- The unlikely Carnot efficiency
- Quantum Heat Engine With Multi-Level Quantum Systems
- Work extremum principle: Structure and function of quantum heat engines
- Efficiency statistics at all times: Carnot limit at finite power
- Universal theory of efficiency fluctuations
- Exactly solvable model of stochastic heat engine: Optimization of power, its fluctuations and efficiency
- Efficiency fluctuations in microscopic machines
Cited by in corpus (17)
- Quantum thermodynamic devices: from theoretical proposals to experimental reality
- An endoreversible quantum heat engine driven by atomic collisions
- Quantum Engines and Refrigerators
- Geometric optimisation of quantum thermodynamic processes
- Quantum finite-time thermodynamics: insight from a single qubit engine
- Fluctuations in heat engines
- Pareto-optimal cycles for power, efficiency and fluctuations of quantum heat engines using reinforcement learning
- Quantum Heat Engines with Carnot Efficiency at Maximum Power
- Quantum Heat Engines with Singular Interactions
- A microscopic theory of Curzon-Ahlborn heat engine
- Current fluctuations in nonequilibrium discontinuous phase transitions
- Efficiency at maximum power of a Carnot quantum information engine
- Quantum heat engines with complex working media, complete Otto cycles and heuristics
- Quantum mean-square predictors and thermodynamics
- Temperature fluctuations in mesoscopic systems
- Rapid optimal work extraction from a quantum-dot information engine
- Quasi-probability distribution of work in a measurement-based quantum Otto engine