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How Can You Be In Two Places At Once...

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Joined: 20 Mar 2006
Posts: 1273
Location: Kent (East Hill), WA

PostPosted: Fri Jan 08, 2010 11:37 pm    Post subject: How Can You Be In Two Places At Once... Reply with quote

Was browsing the December issue of Science at the library when I came across this fascinating article:

Quantum Nonlocality: How Does Nature Do It?
by Nicolas Gisin

We know that two particles (things) can be entangled at a distance...and that they can have states that change at the same time...but Gisin makes it clear that this is not done through any type of 'communication' -- which would have to be faster than the speed of light and violate a whole bunch of physical laws that people have based their careers on.

So how do they do it? I think what Gisin says is that what we think of has a space and or distance has to be completely re-thunk. That the two particles are ... what, instances of some same thing? That just because one thing is 1,000,000 miles away, it's not? I'll have to read this article a few more times...and you might want to read it too...everyone should!!

From early childhood we know that to interact with an object, we have either to go to it or to throw something at it. Yet, contrary to all our daily experience, there are spatially separated quantum systems that exhibit nonlocal correlations. Exploring how nature performs its trick of quantum nonlocality (1) has led to new experiments that provide a deeper understanding of the tension between quantum physics and relativity and to proposals for disruptive technologies.
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