Einstein, Podolsky and Rosen

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Einstein, Podolsky and Rosens argument of
incompleteness of quantum mechanics

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(No Transcript)
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Einstein, Podolsky and Rosen Quantum mechanics
is not complete
According to EPR, any satisfactory physical
theory must be (1) Correct. (2) Complete.
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EPRs elements of reality
If, without in any way disturbing a system, we
can predict with certainty (i.e., with
probability equal to unity) the value of a
physical quantity, then there exists an element
of physical reality corresponding to this
physical quantity.
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The EPR-Bohm experiment
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EPRs argument

• X2 and Y2 are both elements of reality.
• In QM, X2 and Y2 are incompatible observables
  (the knowledge of one precludes the knowledge of
  the other).

? QM is incomplete (according to EPR).