Availing non-Markovian dynamics in effective negative temperature-based transient quantum Otto engines
arXiv:2310.04347 · doi:10.1103/PhysRevA.109.022207
Abstract
We demonstrate that the efficiency of effective negative temperature-based quantum Otto engines, already known to outperform their traditional counterparts operating with positive-temperature thermal reservoirs, can be further improved by terminating the isochoric strokes before the working substance reaches perfect equilibrium with its environment. Our investigation encompasses both Markovian and non-Markovian dynamics during these finite-time isochoric processes while considering a weak coupling between the working substance and the reservoirs. We assess the performance of these engines as they undergo a transition from the Markovian to the non-Markovian regime using two figures of merit: maximum achievable efficiency at a certain finite time during the isochoric heating stroke, and overall performance of the engine over an extended period during the transient phase of this stroke. We show that the maximum efficiency increases with the increase of non-Markovianity. However, the overall engine performance decreases as non-Markovianity increases. Additionally, we discover the existence of effective negative temperature-based necessarily transient quantum Otto engines. These engines operate within an extended operational domain, reaching into temperature ranges where conventional effective negative temperature-based quantum Otto engines, which rely on perfect thermalization during the isochoric strokes, are unable to function. Furthermore, this extended operational domain of an effective negative temperature-based necessarily transient quantum Otto engine increases as non-Markovianity becomes more pronounced.
14 Pages, 4 Figures. Published as "Using non-Markovian dynamics in effective-negative-temperature-based transient quantum Otto engines"
References in corpus (22)
- Quantum Non-Markovianity: Characterization, Quantification and Detection
- Assessing non-Markovian dynamics
- Non-Markovian quantum jumps
- Fisher information under decoherence in Bloch representation
- Negative Absolute Temperature for Motional Degrees of Freedom
- Quantum thermodynamic devices: from theoretical proposals to experimental reality
- Finding the Kraus decomposition from a master equation and vice versa
- Quantum correlated heat engine with nonlinear spin-spin interactions
- Optimal Decoherence Control in non-Markovian Open, Dissipative Quantum Systems
- Exact non-Markovian cavity dynamics strongly coupled to a reservoir
- Quantum heat engine in the relativistic limit: The case of a Dirac particle
- A quantum heat engine with coupled superconducting resonators
- Non-unital non-Markovianity of quantum dynamics
- Nonlocal quantum heat engines made of hybrid superconducting devices
- Quantum and classical dynamics of a three-mode absorption refrigerator
- Otto Engine: Classical and Quantum Approach
- Switching the function of the quantum Otto cycle in non-Markovian dynamics: heat engine, heater and heat pump
- Quantum Otto cycle under strong coupling
- Strongly coupled quantum Otto cycle with single qubit bath
- Negative temperature is cool for cooling
- Non-Markovian modeling of Fermi-Bose systems coupled to one or several Fermi-Bose thermal baths
- Temperature- and interaction-tweaked efficiency boost of finite-time robust quantum Otto engines