Thursday, September 28, 2006
Report: Scientists 'teleport' two photons
HEIDELBERG, Germany, Sept. 18 (UPI) -- Scientists in Germany say they have successfully teleported the combined quantum state of two photons.
That achievement is said to be the first for a composite system, and the researchers say their approach could lead to new ways to harness quantum effects for communication and computational purposes.
A quantum-mechanical system is characterized by a set of properties that can exist in certain possible states. For example, one property of a photon is polarization, the state of which can be horizontal, vertical or a mixture of the two. Quantum teleportation transfers the state -- in this case of the polarization -- of one object to another, which can be an arbitrary distance away.
Teleportation does not transfer energy or matter, the scientists noted.