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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.

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Summary
This summary is machine-generated.

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.

Keywords:
carnot cyclefinite-time thermodynamicsotto cyclequantum heat enginequantum thermodynamics

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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.