Field of Science

Temporal Cloak

The physics and optics blog, Skulls in the Stars, ask this what is a “temporal cloak”, anyway?
The passage of time by Flickr user ToniVCI’ve been saying for a few years that optical science has entered a truly remarkable new era: instead of asking the question, “What are the physical limitations on what light can do?”, we are now asking, “How can we make light do whatever we want it to do?” Among other things, we can make light travel “faster than light“, we can focus light through a highly scattering material, we can take high-resolution pictures with low-resolution sensors, and even make particles “fly” on a “wind” of light!

Inevitably, though, many of these discoveries get misinterpreted in popular news accounts to the point that their real significance is lost in a haze of science fictional, or even supernatural, hype. A good example of this is the “picosecond camera” that I described last week, which is an amazing achievement but also possesses a number of technical limitations that make it not quite a “camera” in the ordinary sense of the word.

This week, the experimental realization of a “space-time cloak” or “temporal cloak” by researchers at Cornell University has made national news.
Read on.

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