1. Mar 17, 2008

noospace

Hi all,

If I have the wave function of a system, then the expectation of position is easily visualized as the centroid of the distribution.

Does anyone know how to visualize the expectation of velocity given just the postion-space wavefunction (real and imaginary parts)

2. Mar 17, 2008

ZapperZ

Staff Emeritus
Er... couldn't you just use the expectation value of the momentum, i.e. <p>? I'm assuming that you know what p operator is in the real-space representation.

Zz.

3. Mar 18, 2008

olgranpappy

I do know what it is!
$$p = -i \frac{d}{dx}$$

...always. since p generates translations in space.

4. Mar 18, 2008