Can We Hide Time?

What if you could cloak a period of time so that any events that occurred within it could not be seen from without? Actions without consequences? Some researchers have demonstrated that it's possible to cloak time, albeit for very short periods at this stage. Later on, who knows?

Technology Review - July 14, 2011

Invisibility cloaks are the result of physicists' newfound ability to distort electromagnetic fields in extreme ways. The idea is steer light around a volume of space so that anything inside this region is essentially invisible.

The effect has generated huge interest. The first invisibility cloaks worked only at microwave frequencies but in only a few years, physicists have found ways to create cloaks that work for visible light, for sound and for ocean waves. They've even designed illusion cloaks that can make one object look like another.

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.


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