View Full Version : Quantum no-hiding theorem experimentally confirmed for first time

4th August 2011, 08:23 AM

In the classical world, information can be copied and deleted at will. In the quantum world, however, the conservation of quantum information means that information cannot be created nor destroyed. This concept stems from two fundamental theorems of quantum mechanics: the no-cloning theorem and the no-deleting theorem.

A third and related theorem, called the no-hiding theorem, addresses information loss in the quantum world. According to the no-hiding theorem, if information is missing from one system (which may happen when the system interacts with the environment), then the information is simply residing somewhere else in the Universe; in other words, the missing information cannot be hidden in the correlations between a system and its environment. Physicists Samuel L. Braunstein at the University of York, UK, and Arun K. Pati of the Harish-Chandra Research Institute, India, first proved the no-hiding theorem in 2007. Until now, however, the no-hiding theorem has been a purely theoretical concept.
Just a teaser, of course. Read the article for the rest. :)

4th August 2011, 05:04 PM
Wow that is awesome. If it continues to be confirmed this may revolutionize a lot of what we thought about the physical universe (and a little of the nonphysical also.)