Energy density of charged capacitor via QFT

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SUMMARY

The discussion focuses on the electromagnetic energy density between the plates of a charged capacitor as described through quantum field theory (QFT). It highlights the use of the Coulomb gauge, where a static electric field manifests as a classical field component. This approach provides a framework for understanding energy distribution in capacitors at a quantum level, emphasizing the interplay between classical and quantum descriptions of electromagnetic fields.

PREREQUISITES
  • Quantum Field Theory (QFT) fundamentals
  • Coulomb gauge in electromagnetic theory
  • Classical electromagnetism principles
  • Understanding of energy density concepts in physics
NEXT STEPS
  • Study the implications of the Coulomb gauge in QFT
  • Explore the relationship between classical and quantum electromagnetic fields
  • Investigate energy density calculations in charged capacitors
  • Learn about the role of static electric fields in quantum mechanics
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Physicists, electrical engineers, and students of quantum mechanics interested in the intersection of classical electromagnetism and quantum field theory.

Spinnor
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From the view point of quantum field theory how does one describe the electromagnetic energy density between the plates of a charged capacitor?

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When using the coulomb gauge, a static electric field appears as a classical field component.
 

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