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Is the analytic properties of Fermionic self energy well known?

by bsmile
Tags: analytic, energy, fermionic, properties
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bsmile
#1
Apr16-14, 11:46 AM
P: 27
For arbitrary Fermionic self energy, \Sigma(i wn) with wn=(2n+1)pi T, its real part is always an even function of wn while its imaginary part is always an odd function of wn.
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Greg Bernhardt
#2
May4-14, 10:46 PM
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I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
bsmile
#3
May5-14, 12:59 PM
P: 27
Sorry, I think the issues about this analytic property of self energy is well known, or easily derived. I was curious why people would not enforce it in their calculation when say they design self energy ansatz for possible analytic continuation.

bsmile
#4
May9-14, 12:50 PM
P: 27
Is the analytic properties of Fermionic self energy well known?

Or, more specifically, \sigma(iw)=\sigma(-iw)*


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