Homework Statement
Hi. For the question given (attachment) where does the factor of 2PI in the function for sigma come from in the first step because I don't get it in my working for the first step. Homework Equations
see attachmentThe Attempt at a Solution
I got sigma (without the 2PI) by...
The wavefunction has that form between minus and plus a/2 i think.
Is the new ground state wavefunction: sqrt(1/a) sin (PI. x/2a).
which i then multiply by the 'original' wavefunction and integrate. Also what will then be the integration limits: minus and plus a/2?
Then mod squared of the...
Homework Statement
a particle of mass m is in the groundstate of a 1D box with width a. the box then expands rapidly and symmetrically to width 2a. i). What is the probability that the particle is in the new groundstate immediately after the expansion? and ii). how rapid must this expansion be...