Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Quantum Mechanics: Finding wavefunction in momentum space.

  1. Sep 14, 2012 #1
    Basically, the problem gives me a wave function and asks me to find the wave function in momentum space. It then asks me to find the expected value. Namely <p> and <p^2>. The problem is, when I try to calculate <p> it blows up to infinity. What am I doing wrong? Here is my work...
    http://imageshack.us/a/img805/1449/qmhw1.jpg [Broken]
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Sep 14, 2012 #2
    Check the step where you complete the square...I think you may have made an error at that point.
     
  4. Sep 14, 2012 #3
    Of course! Thank you very much. I guess that is a sign I should stop doing work and sleep. :]
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook