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Quick question on the EPR paper

  1. Nov 15, 2009 #1
    In the following link below, consider page 2, paragraph 2 ("To illustrate the ideas involved..."). The author Podolsky considers a particle with a 'single degree of freedom.' Then in eq. (6), he shows a true cartesian coordinate system.

    Isn't this an inconsistency with the paper?

    And as you can see from the link, there's a speedy answer to the question...

  2. jcsd
  3. Nov 16, 2009 #2


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    If so, I don't see it. Equation (6) is:
    [tex]P(a,b) = \int^b_a\psi^*\psi dx[/tex]
    That's a single spatial dimension there, x. A single degree of freedom. If it'd been a three dimensional space, you'd have had a volume integral.

    x is a scalar quantity here, not a vector. Perhaps that's what has you confused?
  4. Nov 16, 2009 #3
    Well polosky was using the word 'coordinate' quite frequently in and around eq. (6), so I am guessing he was referring to the cartesian coordinate, no?
  5. Nov 17, 2009 #4


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    What do you mean 'Cartesian coordinate'? It's one-dimensional.
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