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Published on: September 8, 2023
541
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.
Physical Review. E
|May 17, 2024
Summary
Quantum measurement engines face efficiency limits due to energy losses and time delays inherent in quantum processes. This study analyzes a quantum engine
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.
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