Transmission Coefficient of a double delta function potential
V(x) = |g| (δ(x+L)+δ(x-L)
Consider scattering from a repulsive twin-delta function potential.
Calculate R and T.
I'm mostly confused about computing the T coefficients for multiple barriers. Would I compute the T coefficient for the barrier at x = -L and at x = L seperately? Then, instead of having to take an integral for the total T, for a large forbidden region, I can simply multiply the two T coefficients together since the Δx is essentially zero for a delta well.
Also, for the wavefunction in each region I have:
ψI = Aeikx+Be-ikx for (x < -L)
ψII = Ceikx+De-ikx for (-L < x < L)
ψIII = Eeikx+Fe-ikx for (L < x )
But the incident wave is from left to right so F = 0. Am I on the right track?
Re: Transmission Coefficient of a double delta function potential
I think that you are on the right track.
Probably you only have one T; only for x > L, and then you don't actually match the I,R part to the T part, but rather match the I,R part to the left side of the intermediate part, and then match the right side of the intermediate part to the T part.
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