- **Advanced Physics Homework**
(*http://www.physicsforums.com/forumdisplay.php?f=154*)

- - **Transmission Coefficient of a double delta function potential**
(*http://www.physicsforums.com/showthread.php?t=584549*)

Transmission Coefficient of a double delta function potentialV(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: ψ _{I} = Ae^{ikx}+Be^{-ikx} for (x < -L)ψ _{II} = Ce^{ikx}+De^{-ikx} for (-L < x < L)ψ _{III} = Ee^{ikx}+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 potentialI 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. |

All times are GMT -5. The time now is 09:51 AM. |

Powered by vBulletin Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

© 2014 Physics Forums