- #1

ed2288

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## Homework Statement

Calculate the 1st order probability an electron in the ground state of an infinite sqaure well (width 1) will be found in the first excited state t seconds after the pertubation H=sin(PI*x) is switched on.

## Homework Equations

Transition frequency is omega_12

## The Attempt at a Solution

I know to begin this question I need to calculate the integral between 0 and 1 of the product of the ground state wavefunction, pertubation, and 1st excitied wavefunction. The product comes to sin^2(PI*x)sin(2PI*x), which when integrated comes to zero!

Any suggestions??

Thanks

(ps I know that this integral will not give the final answer, but I know exactly what to do after this step)