I just have a simple question to get me started. If I am given an initial value wavefunction ψ(x,0) and I am asked to find <P> at(adsbygoogle = window.adsbygoogle || []).push({}); t = 0can I use this:

<P> = -ih∫ψ*(x,0)[itex]\frac{∂}{∂x}[/itex]ψ(x,0)dx

or do I need to find ψ(x,t) before I find <P>?

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# Expectation value of P for an infinite-square well

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