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The recent Nature article http://www.nature.com/news/data-teleportation-the-quantum-space-race-1.11958 prompts me to ask this question, which is of the same tenor as that asked at the recent Perimeter Institute meeting attended by Zeilinger et al., i.e. "Do the pairs somehow communicate though some still-unknown information channel?"

It seems to me that entanglement could be described as behaving as if in some sense the coordinate separation is described by an extra degree of freedom (dimension) in which either a) the two entangled components are co-located in the extra dimension, allowing instantaneous communication; or b) in the extra dimension, the speed of light is no longer a limitation, and so co-location is not a requirement. ... or some mixture of the two. This could all be rephrased in terms of the concepts of "brane" and "bulk", of course.

Are there many other such "unconventional" interpretations of the nature of entanglement out there?

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Possibly related physics.stackexchange.com/questions/79/… –  twistor59 Dec 11 '12 at 20:21

2 Answers 2

Do the pairs somehow communicate though some still-unknown information channel? No.

Entanglement is, in essence, a quantum correlation and correlations do not imply/require the transmission of any information between the correlated elements. Since there is no transmission of anything, there is no need to invoke or invent a mechanism neither superluminal nor of any other nature.

One of Zeilinger traditional mistakes is that he treats the correlated pair as if was non-correlated and then he is forced to introduce what he calls "the spooky effect at a distance" mechanism for explaining the synch observed in the experimental data.

A rather good discussion of all those topics is given in the textbook by Griffiths "Consistent Quantum Theory" (Cambridge University Press):

The idea that the quantum world is permeated by superluminal influences has come about because of an inadequate understanding of quantum measurements [...] or through assuming the existence of hidden variables instead of (or in addition to) the quantum Hilbert space [...] By contrast, a consistent application of quantum principles provides a positive demonstration of the absence of nonlocal influences, as in the example discussed in Sec. 23.4.

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entanglement is only manifest because entangled components usually have a well-defined total quantum number (like angular momentum) but no defined quantum number of its parts. Locally, quantum mechanics will make both parts to have a dispersive amplitude over different eigenvalues, but global conservation of the quantum number will guarantee that only remote observers eigenstates that have individual quantum numbers such that the global number is conserved will be able to interact to each other.

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