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Einstein’s “Spooky Action” Goes Massive

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The elusive phenomenon of quantum entanglement has been extended to the macroscopic scale after two vibrating drumheads, each the width of a human hair, displayed the “spooky action at a distance” that famously troubled Einstein.

The discovery, published in Nature (, opens the door to the future demonstration of teleportation between massive objects and the study of the poorly understood interplay between quantum mechanics and gravity.

Entanglement, where two distant objects become intertwined in a manner that defies both classical physics and a “common sense” understanding of reality, is perhaps one of the strangest phenomena of quantum theory. In 1935, Einstein expressed his concern over this concept, referring to it as a “spooky action at a distance”.

Nonetheless, entanglement is now considered a cornerstone of quantum mechanics, and is the key resource behind a host of potentially transformative quantum communication and computation technologies. It is, however, extremely fragile, and has previously only been observed with microscopic systems such as light or atoms, and more recently with electrical circuits.

In 2014, Dr Matt Woolley of UNSW Canberra showed theoretically that entanglement of the motion of massive objects could be prepared and detected...

The full text of this article can be purchased from Informit.