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Converting work to heat is an irreversible process, and the purpose of a heat engine is to reverse the effect partially. Heat engines aim to increase the efficiency of the reversal, that is, maximize the work retrieved from heat. If the efficiency of a heat engine were 100%, it would imply reversing the process completely without introducing any other effect. Thus, it would violate the second law of thermodynamics.
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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Superradiant Quantum Heat Engine.

Ali Ü C Hardal1, Özgür E Müstecaplıoğlu1

  • 1Department of Physics, Koç University, İstanbul, Saryer 34450, Turkey.

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|August 12, 2015
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Summary
This summary is machine-generated.

This study introduces a novel quantum heat engine (QHE) using atomic clusters as fuel. Quantum coherence acts as a catalyst, boosting work output quadratically with atom number for efficient quantum thermodynamics.

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Area of Science:

  • Quantum Thermodynamics
  • Quantum Heat Engines
  • Quantum Coherence

Background:

  • Classical thermodynamics, focused on heat engines, remains largely separate from quantum physics.
  • Technological miniaturization drives interest in quantum heat engines (QHEs) operating in quantum regimes.
  • The role of quantum coherence in QHEs is debated, with some viewing it as a resource.

Purpose of the Study:

  • To explore quantum coherence as a catalyst, rather than a resource, in quantum heat engines.
  • To propose a novel QHE design utilizing quantum coherent atomic clusters.
  • To investigate the potential for enhanced work output in QHEs.

Main Methods:

  • Designing a QHE with a photon gas in an optical cavity as the working fluid.
  • Employing quantum coherent atomic clusters as the fuel source.
  • Leveraging superradiance for enhanced energy emission from atomic clusters.

Main Results:

  • Demonstrated that quantum coherence can effectively catalyze QHE operation.
  • Showcased a QHE where work output scales quadratically with the number of atoms in the fuel clusters.
  • Identified a fundamental distinction between quantum and classical fuels.

Conclusions:

  • Quantum coherence can serve as a catalyst in quantum heat engines, offering a new perspective.
  • The proposed QHE design with superradiant atomic clusters significantly enhances work output.
  • This research provides a fundamental insight into quantum fuels and their potential in thermodynamics.