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How to calculate the resonant florescent spectrum of 2-level

  1. Aug 5, 2015 #1
    I am working on calculating the interaction between 2-level atoms and an coherent laser field. I can calculate the radiation intensity versus time from the atoms. I want to calculate the spectrum now. I know the spectrum can be calculated as the fourier transform of ⟨$\langle \sigma^\dagger (t)\sigma (t+\tau)\rangle $,where σ(t)=|0><1| is the lower operator of the atom. I am not sure how to calculate the expectation value containing 2 different time. I heard that it is possible to do so by using the quantum regression theorem. But I don't really understand it, could someone tell me how to use quantum regression theorem using computer explicitly? I am using matlab and treating the operators as matrix. Thank you.
  2. jcsd
  3. Aug 10, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
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