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

For a given wave function Psi(x,t)=Aexp^-(x/a)^2*exp^-iwt*sin(kx) find the expectation value of the linear momentum.

2. Relevant equations

<p>=integral(-inf,inf) psi* p^ psi dx

p^=-ih(bar) d/dx

sin x = (exp ix - exp -ix)/2i

cos x = (exp ix + exp -ix)/2

3. The attempt at a solution

I understand the technique of sandwiching the operator between the wave function and it's complex conjugate. Then the integral is a mess of sines cosines and exponentials. I was wondering if anyone had any advice to simplify the expression or to solve this type of infinite integral. Your suggestions would be very helpful. Thanks in advance.

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Find the expectation value of the linear momentum

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