Saturday, March 17, 2007

Weirdness from Physics

I'm not a big follower of the emerging (and seemingly vast) taxonomy of sub-atomic particles, but this caught my eye.

From Wired (emphasis added):

One of the zanier notions in the world of quantum mechanics is that a pair of subatomic particles can sometimes (ed: when?) become "entangled". This means that the fate of one instantly affects the other, no matter how far apart they are. It's such a bizarre phenomenon that Einstein dissed the idea in the 1930s as "spooky action at a distance".

But it turns out that the universe is spooky after all. In 1997, scientists separated a pair of entangled photons by shooting them through fiber-optic cables to two villages 6 miles apart. Tipping one into a particular quantum state forced the other into the opposite state at a rate that is 7 million times faster than the speed of light. Of course, according to relativity, nothing travels faster than the speed of light -- not even info between particles.

Even the best theories to explain how entanglement gets around this problem seem preposterous. Ultimately, the answer is bound to be unnerving: according to a famous doctrine called Bell's Inequality, for entanglement to square with relativity, either we have no free will or reality is an illusion.

(Ed: Though perhaps it will explain why paper is strongest at the perforations)

2 comments:

Googly Bear said...

Perhaps this explains your Laundry Experiment

M Easter said...

Ha ha... you beat me to it! This occurred to me after posting, while driving...

(I need to blog while driving: it's where the best stuff hits me)