- #1
TheCanadian
- 367
- 13
This is from "An Essay on the Theory of Collective Spontaneous Emission" by Gross and Haroche (1982).
I was wondering how exactly they were able to separate the operator D in the Heisenberg representation into positive and negative frequencies with an imaginary exponential on only the left side of ## D^{\pm}_j ##.
I was also wondering what exactly the PP distribution was referring to. I don't recall reading it defined earlier, and am not entirely sure what it is.
Any help with the above would be greatly appreciated.