(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[itex]<e^{ip'x}|x^{2}|e^{ipx}>[/itex]

2. Relevant equations

3. The attempt at a solution

Its pretty obvious that its difficult to integrate in position-space, so I rewrite x in momentum space (i.e. the second-order differential operator with respect to p).

If that is the case, is this correct (which is the part I'm not sure about):

[itex]C \int^{-\infty}_{-\infty} e^{ip'x}\frac{∂^{2}}{∂p^{2}}e^{ipx} dp[/itex]

(hbar is absorbed into the constant on the side)

Or do I have to fourier transform [itex]e^{ip'x}[/itex] and [itex]e^{ipx}[/itex]?

Thanks.

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# Homework Help: Computing operator in bra-ket within momentum space

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