1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Quantum Mechanics Derivation

  1. Nov 3, 2004 #1
    Hello, I have a quantum mechanics problem. Here is the problem statement. I must derive this formula,

    L+-L- =-(h/2π)^2[d²/dθ²+cotθ d/dθ +cot²θ d²/dθ²+id/dφ]

    from this formula,

    L+-L-=±(h/2π)e^±(iθ)[d/dθ + i cotθ d/dφ]

    I have no idea how to approach this problem. Can anyone give me a suggestion on how to begin the proof? Thanks.
  2. jcsd
  3. Nov 3, 2004 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    Something is wrong here: L+-L- can't be equal to both! The first is clearly a second derivative. Is it supposed to be something like (L+-L-)2?
  4. Nov 3, 2004 #3

    Sorry, wrote it wrong. Got the answer though. Thanks.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Quantum Mechanics Derivation
  1. (Quantum Mechanics) (Replies: 3)

  2. Quantum mechanics (Replies: 1)

  3. Quantum mechanics. (Replies: 2)

  4. Quantum Mechanics (Replies: 10)

  5. Quantum Mechanics (Replies: 2)