[LINK] Scientists Say They Can Make Light Travel 30x Faster Than Normal

[Kim Holburn]

https://www.nature.com/articles/s41467-019-08735-8

> By jointly modulating the spatial and temporal degrees of freedom, arbitrary group velocities are unambiguously observed in free space above or below the speed of light in vacuum, whether in the forward direction propagating away from the source or even traveling backwards towards it.


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Kim Holburn
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