Boing Boing net alerted me to these “up-sizing” of the quantum entanglement experiments…

Quantum entanglement demonstrated in macroscopic objects

By David Pescovitz at 12:24 pm Friday, Dec 2

A pair of diamond crystals, large enough to be seen by the naked eye, have been linked together by quantum entanglement. The diamonds are entangled such that manipulating one affects the other, even though they are physically separated. In this case, the crystals were 3 millimeters wide and 15 centimeters apart. (One of the diamond wafers is pictured below.) Indeed, Einstein called this phenomenon “spooky action at a distance,” and scientists still don’t understand how it’s possible. The University of Oxford physicists published their work today in the journal Science. From Nature:

 Media Inline Room-Temperature-Entanglement 1A vibration in the crystals could not be meaningfully assigned to one or other of them: both crystals were simultaneously vibrating and not vibrating.

Quantum entanglement — interdependence of quantum states between particles not in physical contact — has been well established between quantum particles such as atoms at ultra-cold temperatures. But like most quantum effects, it doesn’t tend to survive either at room temperature or in objects large enough to see with the naked eye.

A team led by Ian Walmsley, a physicist at the University of Oxford, UK, found a way to overcome both those limitations, demonstrating that the weird consequences of quantum theory apply at large scales as well as at very small ones.

Entangled diamonds vibrate together

A team of physicists in Vienna has devised experiments that may answer one of the enduring riddles of science: Do we create the world just by looking at it?

by Joshua Roebke

To enter the somewhat formidable Neo-Renaissance building at Boltzmanngasse 3 in Vienna, you must pass through a small door sawed from the original cathedrallike entrance. When I first visited this past March, it was chilly and overcast in the late afternoon. Atop several tall stories of scaffolding there were two men who would hardly have been visible from the street were it not for their sunrise-orange jumpsuits. As I was about to pass through the nested entrance, I heard a sudden rush of wind and felt a mist of winter drizzle. I glanced up. The veiled workers were power-washing away the building’s façade, down to the century-old brick underneath.

In 1908 Karl Kupelwieser, Ludwig Wittgenstein’s uncle, donated the money to construct this building and turn Austria- Hungary into the principal destination for the study of radium. Above the doorway the edifice still bears the name of this founding purpose. But since 2005 this has been home of the Institut für Quantenoptik und Quanteninformation (IQOQI, pronounced “ee-ko-kee”), a center devoted to the foundations of quantum mechanics. The IQOQI, which includes a sister facility to the southwest in the valley town of Innsbruck, was initially realized in 2003 at the behest of the Austrian Academy of Sciences. However, the institute’s conception several years earlier was predominantly due to one man: Anton Zeilinger. This past January, Zeilinger became the first ever recipient of the Isaac Newton Medal for his pioneering contributions to physics as the head of one of the most successful quantum optics groups in the world. Over the past two decades, he and his colleagues have done as much as anyone else to test quantum mechanics. And since its inception more than 80 years ago, quantum mechanics has possibly weathered more scrutiny than any theory ever devised. Quantum mechanics appears correct, and now Zeilinger and his group have started experimenting with what the theory means.


Seed: The Reality Tests