[3] L. Mandel and E. Wolf, "The Quantum Theory of Light," Oxford University Press, 2008.
The Loudon quantum theory of light, also known as the Loudon quantum electrodynamics (QED) or Loudon's theory of quantized light, is a theoretical framework that attempts to describe the behavior of light in the context of quantum mechanics. loudon quantum theory of light pdf
[2] R. Loudon, "Quantum Optics," Oxford University Press, 2000. [3] L. Mandel and E. Wolf