These techniques could make it possible to route slower-than-light signals in electronic circuits faster than before.
“We sent a pulse through an optical fiber, and before its peak even entered the fiber, it was exiting the other end. Through experiments we were able to see that the pulse inside the fiber was actually moving backward, linking the input and output pulses.”
“The pulse of light is shaped like a hump with a peak and long leading and trailing edges. The leading edge carries with it all the information about the pulse and enters the fiber first. By the time the peak enters the fiber, the leading edge is already well ahead, exiting. From the information in that leading edge, the fiber essentially ‘reconstructs’ the pulse at the far end, sending one version out the fiber, and another backward toward the beginning of the fiber.”
Faster than light
Let’s put that another way, verbatim from a statement issued by the University of Rochester:
“As the pulse enters the material, a second pulse appears on the far end of the fiber and flows backward. The reversed pulse not only propagates backward, but it releases a forward pulse out the far end of the fiber. In this way, the pulse that enters the front of the fiber appears out the end almost instantly, apparently traveling faster than the regular speed of light.”
What about Einstein, who said nothing can exceed light-speed?
“Einstein said information can’t travel faster than light, and in this case, as with all fast-light experiments, no information is truly moving faster than light,” Boyd said.
A spokesperson at the university’s communications department added this: “Everything that defines the pulse that enters, also defines the pulse that exits. But the energy of the light does not travel faster than light.”
“Everything that defines the pulse that enters, also defines the pulse that exits. It is in theory possible to travel faster than the speed of light in an electric pulse, which gravity contains, in a world of dark matter/antimatter, if we are able to harness this energy to make inter-space travel possible.” Contributed by Oogle.
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