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A Squeezed light

  1. Jun 26, 2016 #1
    I am currently reading around about squeezed light. I understand as far as the Second-Harmonic Generation (SHG) and Optical Parametric Amplifier (OPA) work, however I do not understand why the signal and idler photons that are produced by the OPA are a squeezed state.

    All diagrams that I have seen show the pump and seed beams entering the OPA, and then the signal and idler beams leaving, with the label "squeezed". A lot of the literature seems to plainly state that the strong entanglement of the photons (I understand what that is) produces the squeezed state. I do not see that connection myself. If you could please give a physical explanation prior to using any mathematics that would be hugely appreciated.

    Many thanks in advance!
  2. jcsd
  3. Jun 27, 2016 #2


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    Since you haven't yet received a helpful answer, you should probably say which papers/books you're reading on this subject. E.g., have you studied the textbook of Mandel & Wolf? (That's my primary go-to book for many questions in quantum optics)?

    Also, instead of saying "a lot of the literature...", give some specific references and/or links.
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