Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am wondering whether there is a version of adiabatic theorem in the regime of quantum optics. My understanding of quantum optics involves with the interaction between photon and atom. This interaction has always been almost instant. But the perturbation for adiabatic theorem needs to be as slow as possible. This is what confuses me.

Is there any adiabatic theorem for quantum optics at all?

share|cite|improve this question
Coherent laser light is not the same as a whole bunch of independent photons. The state of an atom can be changed adiabatically by laser light. – Peter Shor Jul 25 '13 at 13:58
@PeterShor, thanks! I didn't know that. Just found this ( – Omar Shehab Jul 25 '13 at 14:05
@PeterShor, what about correlated photons? Can we change the state of a pair of correlated photons (say, generated by SPDC) adiabatically? – Omar Shehab Jul 31 '13 at 16:39
I don't believe people know how to do that. – Peter Shor Jul 31 '13 at 17:28
@PeterShor, Is that even possible? I think a prerequisite is to have single photon or biphoton system with ground and higher energy level. I am not sure how one can make such state. So I asked a separate question here (…) – Omar Shehab Jul 31 '13 at 20:11

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.