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Page13 on Griffiths quantum mechanics

  1. Jan 16, 2012 #1
    In the prove of the Schrodinger equation preserves the normalization I don't understand the step
    from

    ∂ψ/∂t=ih/2m ∂2ψ/∂x2- i/h Vψ

    to

    ∂ψ*/∂t=-ih/2m ∂2ψ/∂x2+ i/h Vψ* (h represents h bar)

    the book says "taking complex conjugate equation" but I don't see how.

    Thanks in advance.
     
  2. jcsd
  3. Jan 17, 2012 #2
    Welcome Frank, it says it's your first post~

    Alright so we literally just change any aspect of the equation which contains an imaginary component to minus said component.

    For example...
    [itex]e^{-iHt/ \hbar} [/itex]
    goes to

    [itex]e^{iHt/ \hbar} [/itex]

    We make the assumption that V is real and that ψ is complex.

    Given the above should help, I'm sure you're familiar but, just in case ψ* refers to the complex conjugate of ψ.

    Let me know if I missed what you were asking some how, though I'm sure someone can answer a little more cleanly.

    http://en.wikipedia.org/wiki/Complex_conjugate
    The wiki page provides the general information on conjugating as well.
     
  4. Jan 17, 2012 #3
    If you have some equation a = b then you can take the complex conjugate of both sides and get a* = b*. Then you just have to know that the complex conjugate of a product is the product of the complex conjugate; the complex conjugate of a derivative is the derivative of the complex conjugate; the complex conjugate of i is -i; etc.
     
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