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Quantum Finite-Time Thermodynamics: Insight from a Single Qubit Engine
Roie Dann1, Ronnie Kosloff1, Peter Salamon2
1The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
Entropy (Basel, Switzerland)
|December 8, 2020
Summary
This study explores the efficiency-power tradeoff in thermodynamics using a qubit engine model. It reveals how quantum effects like coherence drive irreversibility and entropy production in finite-time cycles.
Area of Science:
- Quantum Thermodynamics
- Statistical Mechanics
- Quantum Information
Background:
- Thermodynamics traditionally balances efficiency and power.
- Quantum systems offer new avenues to explore these tradeoffs.
- Understanding irreversibility is key in finite-time processes.
Purpose of the Study:
- Investigate the efficiency-power tradeoff using a quantum engine model.
- Explore the quantum origins of irreversibility and entropy production.
- Analyze finite-time thermodynamic cycles based on quantum principles.
Main Methods:
- Utilized a qubit engine as a toy model.
- Applied the quantum theory of open systems.
- Constructed finite-time Otto and Carnot engine cycles.
- Analyzed heat transport, quantum friction, and thermalization.
Main Results:
- Demonstrated how incorporating time addresses the efficiency-power tradeoff.
- Identified quantum friction and thermalization as sources of irreversibility.
- Showcased the role of coherence in entropy production.
- Developed finite-time quantum engine cycles.
Conclusions:
- Quantum effects, particularly coherence, are crucial for understanding entropy production.
- Finite-time quantum thermodynamics provides insights into irreversibility.
- Qubit engines serve as valuable models for fundamental thermodynamic studies.
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