Mr. T.M. and a few other people sent along this article this past week, and it's one whose implications, if true, might be rather dramatic, for it seems that the phenomenon of quantum entanglement might exist at scales much larger than mere sub-atomic particles:
As the article points out, entanglement experiments have now succeeded in demonstrating entanglement properties, not just between sub-atomic particles, but now, clusters of atoms:
Experimenters around the world are trying to harness perhaps the most perplexing property in physics: quantum entanglement, which Einstein called “spooky action at a distance.” A few teams of scientists have succeeded in bringing this eerie behavior, which normally only exists between pairs of particles, to much bigger systems.
Two of science’s most prestigious journals have released a combined five articles in the past two days demonstrating entanglement’s eccentricities in many-atom systems. The methods are different and have different applications: One set of papers took advantage of the weirdness of super-cold atomic clouds called Bose-Einstein condensates, while the other relied on vibrating components. But these are the kinds of advances that may bring some of quantum mechanics’ quirkiest qualities into the mainstream.“Seeing these phenomena on macroscopic scales in many-particle systems is an important step in this framework, in a field trying to control quantum behavior on larger scales and use them in technology and eventually everyday objects,” Phillip Treutlein, one of the papers’ authors from University of Basel in Switzerland, told Gizmodo....There’s clearly lots of interest in applying the weirdness of quantum mechanics to real-world problems that are interesting to more people than just theoretical physicists. But doing so will require more than just entangling a few atoms—it will require macroscopic systems that aren’t so fragile that any nudge destroys the spooky entangled connection. With experiments like these, applications are inching ever closer. (Emphasis added)