Otto refrigerator based on a superconducting qubit: Classical and quantum performance
By Bayan Karimi, Jukka P. Pekola. 2016
137 citations recorded by the source corpus.
We analyse a quantum Otto refrigerator based on a superconducting qubit coupled to two LC-resonators each including a resistor acting as a reservoir. We find various operation regimes: nearly adiabatic (low driving frequency), ideal Otto cycle (intermediate frequency), and non-adiabatic coherent regime (high frequency). In the nearly adiabatic regime, the cooling power is quadratic in frequency, and we find substantially enhanced coefficient of performance $\epsilon$, as compared to that of an ideal Otto cycle. Quantum coherent effects lead invariably to decrease in both cooling power and $\epsilon$ as compared to purely classical dynamics. In the non-adiabatic regime we observe strong coherent oscillations of the cooling power as a function of frequency. We investigate various driving waveforms: compared to the standard sinusoidal drive, truncated trapezoidal drive with optimized rise and dwell times yields higher cooling power and efficiency.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics
View Paper: https://www.semanticscholar.org/paper/28e81929358ed49a6723393cf861e5661740f4bf
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
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Citations in the corpus
- Tunable photonic heat transport in a quantum heat valve (2018, unknown): “Since the non-Hamiltonian model for gQr 1 is described elsewhere [30, 31], we focus here only on the quasi-Hamiltonian applicable when gQr & 1.”
- Colloquium : Quantum heat transport in condensed matter systems (2021, background): “Experiments fully in the quantum regime are up to now practically nonexistent, although there are proposals that address realistic setups (Abah et al., 2012; Karimi and Pekola, 2016).”
- Daemonic ergotropy: enhanced work extraction from quantum correlations (2016, background): “…11 Quantum coherences are believed to be responsible for the extraction of work from a single heat bath 12 and the enhanced performance of quantum engines, 13 while weakly driven quantum heat engines are known to exhibit enhanced power outputs with respect to their classical (stochastic) versions.”