[vannrox]

Very exciting.

[staytrue]

This was posted a week ago and discussed ad nauseum. This is nothing new. Physicist says the group velocity remains sub light while the phase velocity is faster than light. My opinion is that they are setting up a large number of waves in a bounded wave guide such that the interference pattern of the waves make it seem like a single pulse is traveling at above light speeds, but what they are really looking at is a summation of sub light waves where the superposition of said waves only give an appearance of above light speed.

[robertpaulsen]

"in theory no useful information can get transmitted at faster-than-light speeds"

Upon viewing ABC News, it appears that the same is true for slower-than-light speeds.