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Homework Statement
Find the probability current of a free particle. What direction does the probability current flow?
Homework Equations
The Attempt at a Solution
The book also gives the wave equation and probability current flow in terms of Psi so it is just plug and solve. I have the correct answer for this [tex] J = A^2 \frac{\hbar k}{m} [/tex]
I also know that the answer for probability current flow is in the positive x direction but I don't understand why, given that it seems to be uniform and independent of x.