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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1991),
  • paper QTuI56

Macroscopic electromagnetic field and medium operators: a microscopic derivation and their quantum properties

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Abstract

We derive the macroscopic electromagnetic-field and medium operators for a linear medium with a microscopic model. We show that, contrary to claims in the literature, the canonical momentum for the macroscopic field is –ε0Ê , not –D̂. We find that despite the change in the field-operator normalization constants, the equal-time commutators among the macroscopic electric-field, magnetic-field, and medium operators still preserve the values of their microscopic counterparts. This preservation of the equal-time commutator is important from a fundamental standpoint, such as the preservation of microcausality

© 1991 Optical Society of America

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