Quantum Otto cycle under strong coupling
arXiv:2205.09400 · doi:10.1103/PhysRevE.107.044127
Abstract
Quantum heat engines are often discussed under the weak coupling assumption that the interaction between the system and the reservoirs is negligible. Although this setup is easier to analyze, this assumption cannot be justified on the quantum scale. In this study, a quantum Otto cycle model that can be generally applied without the weak coupling assumption is proposed. We replace the thermalization process in the weak coupling model with a process comprising thermalization and decoupling. The efficiency of the proposed model is analytically calculated and it indicates that when the contribution of the interaction terms is neglected in the weak interaction limit, it reduces to that of the earlier model. The sufficient condition for the efficiency of the proposed model not to surpass that of the weak coupling model is that the decoupling processes of our model have a positive cost. Moreover, the relation between the interaction strength and the efficiency of the proposed model is numerically examined using a simple two-level system. Furthermore, we show that our model's efficiency can surpass that of the weak coupling model under particular cases. From analyzing the majorization relation, we also find a design method of the optimal interaction Hamiltonians which are expected to provide the maximum efficiency of the proposed model. Under these interaction Hamiltonians, the numerical experiment shows that the proposed model achieves higher efficiency than that of its weak coupling counterpart.
arXiv comment14 pages, 4 figures
References in corpus (40)
- Stochastic thermodynamics, fluctuation theorems, and molecular machines
- Quantum Thermodynamic Cycles and quantum heat engines
- A single-atom heat engine
- A nano heat engine beyond the Carnot limit
- Single ion heat engine with maximum efficiency at maximum power
- Entropy production as correlation between system and reservoir
- Experimental characterization of a spin quantum heat engine
- The quantum harmonic Otto cycle
- A spin heat engine coupled to a harmonic-oscillator flywheel
- Quantum thermodynamic devices: from theoretical proposals to experimental reality
- First and Second Law of Thermodynamics at strong coupling
- Quantum Thermodynamic Cycles and Quantum Heat Engines (II)
- Nonequilibrium thermodynamics in the strong coupling and non-Markovian regime based on a reaction coordinate mapping
- Nonequilibrium fluctuations in quantum heat engines: Theory, example, and possible solid state experiments
- Squeezed thermal reservoirs as a resource for a nano-mechanical engine beyond the Carnot limit
- How to generate random matrices from the classical compact groups
- Quantum Measurement Cooling
- Quantum thermal absorption machines: refrigerators, engines and clocks
- Performance of a quantum heat engine at strong reservoir coupling
- Coherence effects in the performance of the quantum Otto heat engine
- Efficiency of a quantum Otto heat engine operating under a reservoir at effective negative temperatures
- Thermodynamic universality of quantum Carnot engines
- Strong Coupling Thermodynamics of Open Quantum Systems
- Strong coupling corrections in quantum thermodynamics
- Energy exchange in driven open quantum systems at strong coupling
- Efficiency of harmonic quantum Otto engines at maximal power
- Single-Temperature Quantum Engine Without Feedback Control
- Strongly coupled quantum heat machines
- Measurement driven single temperature engine
- Thermal machines beyond the weak coupling regime
- Efficiency fluctuations of a quantum Otto engine
- Quantum thermodynamics in strong coupling: heat transport and refrigeration
- Measurement-based quantum heat engine in a multilevel system
- Quantum limit to nonequilibrium heat-engine performance imposed by strong system-reservoir coupling
- Bounds on fluctuations for finite-time quantum Otto cycle
- Measurement Based Quantum Heat Engine with Coupled Working Medium
- Otto Engine: Classical and Quantum Approach
- Heat Bath Algorithmic Cooled Quantum Otto Engines
- Quantumness and thermodynamic uncertainty relation of finite-time Otto cycle
- System-reservoir theory with anharmonic baths: a perturbative approach
Cited by in corpus (7)
- Roadmap on Quantum Thermodynamics
- Dynamically Emergent Quantum Thermodynamics: Non-Markovian Otto Cycle
- Dynamics of a strongly coupled quantum heat engine -- computing bath observables from the hierarchy of pure states
- Quantum Carnot thermal machines re-examined: Definition of efficiency and the effects of strong coupling
- Availing non-Markovian dynamics in effective negative temperature-based transient quantum Otto engines
- Out-of-equilibrium quantum thermochemical engine with one-dimensional Bose gas
- Structure of Quantum Mean Force Gibbs States for Coupled Harmonic Systems