Photodetection Efficiency (pde)

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    Efficiency Pde
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what is pde ?

in terms of the formula , and in general so i can picture it in my mind so to speak.
 
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Do you have a reference/formula/device in mind? It would make it more likely for you to get some replies if you include more specific information.
 
sorry ,, for photodetectors like a pmt.
 
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I'm following this paper by Kitaev on SL(2,R) representations and I'm having a problem in the normalization of the continuous eigenfunctions (eqs. (67)-(70)), which satisfy \langle f_s | f_{s'} \rangle = \int_{0}^{1} \frac{2}{(1-u)^2} f_s(u)^* f_{s'}(u) \, du. \tag{67} The singular contribution of the integral arises at the endpoint u=1 of the integral, and in the limit u \to 1, the function f_s(u) takes on the form f_s(u) \approx a_s (1-u)^{1/2 + i s} + a_s^* (1-u)^{1/2 - i s}. \tag{70}...

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