Monday, January 11, 2010

Carbon Nanotubes as Cooper-Pair Beam Splitters

An amazing experimental feat. This experiment is along the lines of previous experiments that tries to split a Cooper pair into its entangled individuals.

Now, a new experiment by L. G. Herrmann in France, working with colleagues in France, Spain, and Germany, published in Physical Review Letters [1] demonstrates that electrons entangled in a superconducting Cooper pair can be spatially separated into different arms of a carbon nanotube, a material thought favorable for the efficient injection and transport of split, entangled pairs. This work may help pave the way for tests of nonlocal effects in solid-state systems, as well as applications such as quantum teleportation and ultrasecure communication.

If they can be separated at large enough distances to remove the locality loophole, then this would be the source of the first no-loophole EPR-type experiment.


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