Time for the silly book game !
The instructions are: Grab the nearest book, open it to page 23, find the 5th sentence, post the text of the sentence in your journal along with these instructions.
The effects of the coupling to the light field and spontaneous emission can be added independently.
Obviously I am at work. If I was at home it would have been from the Camel Book, but Luis probably needs a break from Perl. I considered moving the laptop closer to a more interesting book. Unfortunately more interesting books don't necessarily have a more interesting page 23. Besides, it would be cheating (and I can't do the typesetting that some of them would have required).