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Limits on quantum measurement engines.

Guillermo Perna1, Esteban Calzetta1

  • 1Departamento de Física, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina and CONICET - Universidad de Buenos Aires, Ciudad Universitaria, Ciudad de Buenos Aires CP 1428, Argentina.

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Quantum measurement engines face efficiency limits due to energy losses and time delays inherent in quantum processes. This study analyzes a quantum engine

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Area of Science:

  • Quantum physics
  • Thermodynamics
  • Quantum measurement

Background:

  • Quantum measurements involve energy exchange, dissipation, and time delays.
  • These factors limit the efficiency and power of quantum engines.
  • Understanding these limitations is crucial for developing advanced quantum technologies.

Purpose of the Study:

  • To propose and analyze a novel quantum engine.
  • To investigate the impact of quantum measurement on engine performance.
  • To determine the fundamental limitations on efficiency and power.

Main Methods:

  • Modeling a quantum engine using a spin 1/2 particle in a magnetic field.
  • Accounting for energy dissipation and time delays.
  • Analyzing the coupling with the electromagnetic vacuum as a measurement apparatus.
  • Studying the engine's dynamics, work, power, and efficiency.

Main Results:

  • The quantum nature of evolution and interaction with the electromagnetic vacuum impose fundamental limits.
  • Energy losses and time delays significantly affect the engine's work output and power.
  • Efficiency and power are constrained by quantum effects.

Conclusions:

  • Quantum measurement processes inherently limit quantum engine performance.
  • The proposed spin-1/2 particle engine provides a framework for studying these quantum limitations.
  • Further research can explore strategies to mitigate these effects for practical quantum engines.