Explore BrainMass

Ehrenfest theorem

Spreading of a free wave packet:
Consider a free particle
a. Show, applying Enhrenfest's theorem that <X> is a linear function of time, the mean value <P> remaining constant
b. Write the equations of motion for the meal values <X^2> and <XP+PX>. Integrate these equations.

© BrainMass Inc. brainmass.com July 21, 2018, 9:28 pm ad1c9bdddf

Solution Preview

Hello and thank you for posting your question to Brainmass.
The solution is attached below in ...

Solution Summary

The solution demonstrates, step-by-step, how to use Ehrenfest theorem to find and solve the equation of motion for a free particle.