jueves, 9 de abril de 2015

Scientists eye secure communications by slowing down light



fiber optics background with...


We've already seen what fiber optics can do for internet speeds, and it looks like the medium could be used for quantum communications too. See, as EurekAlert tells it, scientists from the Vienna University of Technology have figured out a way to modify the material so it can be used to control the speed of light. The researchers successfully grafted cesium atoms to the fibers, allowing them to slow light down from its typical 671 million MPH pace to around 112 MPH (180 KPH). The researchers were able to bring the light to a complete stop and then restart it later, too -- something EurekAlert says in a pretty major step toward quantum internet. It'd be much more secure than what we have currently as well, given that professor Arno Rauschenbeutel says that quantum physics at its very core allows for a connection between sender and receiver and anyone tapping in won't go unnoticed.


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