Bits of Reality

Not just for codes and computers, quantum information holds clues to the nature of the physical universe

By Tom Siegfried, 11:48 AM March 22, 2012

Ask any physicist to name the top two theories of the 20th century, and you’ll almost always get the same automatic answer: Einstein’s relativity and quantum mechanics. But lately a few 21st century thinkers have hinted that maybe the third-place theory should move up a notch. In the wake of the computer revolution, information theory might deserve to displace relativity in the rankings.

That revisionist perspective reflects a late 20th century twist in the story of that century’s theories:...

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