Dear Liu,
> I have met a strange problem in computing conductance of 1D > quantum wire. > The setup is as follows: > The hopping of the quantum wire is given by the first kind of > Bessel function, for example, J0(A). > The coupling of the lead is set as 1. > As we know in this case the transmission should be proportional > to J0(A)^2. However, I get very different results for wire of even and > odd sites numbers as shown in the attachment... > Is this a bug or do I miss something else? > This is probably not a bug in Kwant. I see in your script that you do not construct your system in a very idiomic manner (you manually add nearest-neighbor hoppings etc). Are you sure you did not make a mistake during system construction? Did you plot the system in the two cases (even/odd) and see that everything is as you expect? Happy Kwanting, Joe
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