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Maxwell's Equation Of Electromagnetism01:29

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Observing a quantum Maxwell demon at work.

Nathanaël Cottet1, Sébastien Jezouin1, Landry Bretheau1

  • 1Laboratoire Pierre Aigrain, Ecole Normale Supérieure, PSL Research University, CNRS, Université Pierre et Marie Curie, Sorbonne Universités, Université Paris Diderot, Sorbonne Paris-Cité, 75231 Paris Cedex 05, France.

Proceedings of the National Academy of Sciences of the United States of America
|July 5, 2017
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate a Maxwell

Keywords:
quantum informationquantum thermodynamicssuperconducting circuits

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Area of Science:

  • Thermodynamics
  • Quantum Information Science
  • Statistical Mechanics

Background:

  • Maxwell's demon paradox highlights the link between information and thermodynamics.
  • Resolving this paradox requires understanding information's role in thermodynamic processes.

Purpose of the Study:

  • To experimentally realize a Maxwell demon in both classical and quantum regimes.
  • To investigate the conversion of information into work using quantum systems.

Main Methods:

  • Utilized a microwave cavity to encode quantum information about a superconducting qubit.
  • Employed stimulated emission to convert information into work by powering a microwave pulse.
  • Directly measured extracted work and quantified residual entropy in the demon's memory.

Main Results:

  • Successfully demonstrated a Maxwell demon experiment tracking constituent states.
  • Quantified the work extracted from information in a quantum system.
  • Showcased the direct measurement of information-to-work conversion.

Conclusions:

  • The experiment provides a tangible illustration of the thermodynamic cost of information processing.
  • Confirms the intimate relationship between information theory and thermodynamics in a quantum context.
  • Highlights the potential for quantum systems to explore fundamental physics principles.