Enhanced Efficiency at Maximum Power in a Fock-Darwin Model Quantum Dot Engine

We study the performance of an endoreversible magnetic Otto cycle with a working substance composed of a single quantum dot described using the well-known Fock-Darwin model. We find that tuning the intensity of the parabolic trap (geometrical confinement) impacts the proposed cycle's performanc...

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Bibliographic Details
Published in:Entropy (Basel, Switzerland) Switzerland), 2023-03, Vol.25 (3), p.518
Main Authors: Peña, Francisco J, Myers, Nathan M, Órdenes, Daniel, Albarrán-Arriagada, Francisco, Vargas, Patricio
Format: Article
Language:English
Subjects:
Efficiency
Energy
Energy efficiency
Engines
magnetic cycle
Magnetic fields
Mathematical models
Maximum power
Oscillators
Otto cycle
Parameters
Quantum dots
quantum Otto cycle
quantum thermodynamics
Spectrum analysis
Thermodynamic cycles
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Summary:We study the performance of an endoreversible magnetic Otto cycle with a working substance composed of a single quantum dot described using the well-known Fock-Darwin model. We find that tuning the intensity of the parabolic trap (geometrical confinement) impacts the proposed cycle's performance, quantified by the power, work, efficiency, and parameter region where the cycle operates as an engine. We demonstrate that a parameter region exists where the efficiency at maximum output power exceeds the Curzon-Ahlborn efficiency, the efficiency at maximum power achieved by a classical working substance.
ISSN:1099-4300
1099-4300
DOI:10.3390/e25030518