Report: Scientists 'teleport' two photons

September 18, 2006

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.

Teleportation of quantum states involving more than one particle -- as now shown by Qiang Zhang and colleagues in the Physics Institute at the University of Heidelberg -- promise secure information exchange and the ability to solve certain tasks faster than any classical computer.

The authors' experiment lasted several days, but with further improvements they say their process might become of more practical value.

The research is reported in the current issue of the journal Nature Physics.

Copyright 2006 by United Press International

Explore further: Physicists measure complementary properties using quantum clones

Related Stories

Recommended for you

ATLAS observes direct evidence of light-by-light scattering

August 15, 2017

Physicists from the ATLAS experiment at CERN have found the first direct evidence of high energy light-by-light scattering, a very rare process in which two photons – particles of light – interact and change direction. ...

Now you can levitate liquids and insects at home

August 15, 2017

Levitation techniques are no longer confined to the laboratory thanks to University of Bristol engineers who have developed an easier way for suspending matter in mid-air by developing a 3D-printed acoustic levitator.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.