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Rose16
 one year ago
consider a wave packet satisfying the relation deltax Deltapx approximately = h/2 Pi. Show that if the packet is not to spread appreciably while it passes through a fixed position, the condition Deltapx <<px must hold.
Rose16
 one year ago
consider a wave packet satisfying the relation deltax Deltapx approximately = h/2 Pi. Show that if the packet is not to spread appreciably while it passes through a fixed position, the condition Deltapx <<px must hold.

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Rose16
 one year ago
Best ResponseYou've already chosen the best response.1This is my question, I send it here because I could not write the symbols in the question place. I hope it is clear here.

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2Hint: the wave packet \( \large\left \alpha \right\rangle \), which minimize the Heisenberg's uncertainty condition, is the gaussian wave packet , whose width is \( \large d\), for example: \[\Large {\psi _\alpha }\left( x \right) = \frac{1}{{{\pi ^{1/4}}\sqrt d }}\exp \left( {ikx  \frac{{{x^2}}}{{2{d^2}}}} \right)\] Using that wave packet, we can show that: \[\Large \sqrt {\left\langle {{{\left( {\Delta p} \right)}^2}} \right\rangle } = \frac{\hbar }{{d\sqrt 2 }},\quad \left\langle p \right\rangle = \hbar k\]

Rose16
 one year ago
Best ResponseYou've already chosen the best response.1Could you please explain in more details because I did not understand what you mean
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