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-   -   Given a wave function at t=0, how do you find the wave function at time t? (http://www.physicsforums.com/showthread.php?t=441268)

 Demon117 Oct24-10 05:14 PM

Given a wave function at t=0, how do you find the wave function at time t?

I am given the following:

A spherically propogating shell contains N neutrons, which are all in the sate

$$\psi$$(r,0)=4$$\pi$$i$$j_{1}$$(kr)(3/$$\sqrt{34}$$$$Y^{0}_{1}$$+5/$$\sqrt{34}$$$$Y^{-1}_{1}$$)

at t = 0.

How do we find $$\psi$$(r,t)?

My attempt:

I have a few thoughts; could you apply the time-independent schrodinger equation to find the energy of the state? If that is the case then you would simply tack on the factor of $$e^{-i\omega*t}$$. Then you would know that $$\hbar*\omega$$=E. . . . right?

 jfy4 Oct24-10 06:42 PM

Re: Given a wave function at t=0, how do you find the wave function at time t?

I think that should do it. With the TISE, and the TDSE factor, I think you can it.

 arkajad Oct25-10 09:04 AM

Re: Given a wave function at t=0, how do you find the wave function at time t?

This will do if your state is energy eigenstate. If it is a linear combination of energy eigenstates, then you will have to multiply each term by the appropriate phase factor. In this case summation of the new series to get a closed formula may not be easy.

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