Talk-Polywell.org

Posted: **Thu Dec 29, 2011 10:24 pm**

First Demonstration of Time Cloaking

Today, Moti Fridman and buddies, at Cornell University in Ithaca, go a step further. These guys have designed and built a cloak that hides events in time.

Time cloaking is possible because of a kind of duality between space and time in electromagnetic theory. In particular, the diffraction of a beam of light in space is mathematically equivalent to the temporal propagation of light through a dispersive medium. In other words, diffraction and dispersion are symmetric in spacetime.

http://www.technologyreview.com/blog/arxiv/26992/

Posted: **Fri Dec 30, 2011 1:07 am**

I don't really understand how this is different then regular cloaking. I mean, if something is normal cloaked for some amount of time, then it is implicitly time cloaked as well. I mean, are those space-time events not hidden? Also, their space-time diagram makes no sense. They have rays going sideways which would mean they are not moving, and then rays going backward in time.

Talk-Polywell.org

Time Cloaking?

Time Cloaking?