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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Efficient Quantum Measurement Engines.

Cyril Elouard1, Andrew N Jordan1,2,3

  • 1Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.

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Summary
This summary is machine-generated.

We introduce novel quantum engines that harness energy directly from quantum measurement, not heat. These engines perform work by moving particles, achieving high efficiency through specific measurement outcomes.

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Area of Science:

  • Quantum mechanics
  • Thermodynamics
  • Quantum information science

Background:

  • Classical information-driven engines rely on thermal sources.
  • Quantum measurement offers a novel energy source.
  • Understanding quantum engine mechanics is crucial for future technologies.

Purpose of the Study:

  • To propose and analyze quantum engines powered solely by position-resolving measurements.
  • To investigate the work output and efficiency of these quantum engines.
  • To explore the role of feedback in optimizing quantum engine performance.

Main Methods:

  • Theoretical modeling of quantum engines driven by measurement.
  • Analysis of particle dynamics under quantum measurement.
  • Calculation of work done and engine efficiency based on measurement outcomes.

Main Results:

  • Quantum engines can generate work directly from the measurement process via wave-function collapse.
  • Engine performance is dependent on specific engine parameters and feedback.
  • Near-unit efficiency is achievable when measurement outcomes prepare subsequent cycles.

Conclusions:

  • Quantum measurement is a viable energy source for novel engines.
  • Feedback control is essential for maximizing quantum engine efficiency.
  • These findings open new avenues for quantum thermodynamics and energy harvesting.