Re: Quantum Ph. Vs. Relativity

Gregory L. Hansen wrote: 
Here's how I think of quantum entanglement.

Suppose a red ball and a blue ball are placed in an urn. One drawn at random, sealed in a small box, and sent by express delivery to Stan in New York, the other packed and sent to Vladimir in Moscow. When Vladimir opens his package and sees the color of the ball, he immediately knows which color ball Stan got. And vice versa when Stan opens his package. There is no need to communicate, except knowing what the possible results are. 

That's Bertlmann's socks.

  The case of Bertlmann's socks is often cited. Dr. Bertlmann likes to wear
  two socks of different colours. Which colour he will have on a given foot
  on a given day is quite unpredictable. But when you see that the first
  sock is pink you can already be sure that the second sock will not be
  pink. Observation of the first, and experience of Bertlmann, gives
  immediate information about the second. There is no accounting for the
  tastes, but apart from that there is no mystery here. And is not the EPR
  business just the same?

      -- John Bell, _Bertlmann's Socks and Nature of Reality_

The EPR business is not the same, as he goes on to explain.


-- Ben

(who never wears socks of the same color, except on formal occasions)
.

Relevant Pages

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