Visitors are allowed 3 free articles per month (without a subscription), and private browsing prevents us from counting how many stories you've read. We hope you understand, and consider subscribing for unlimited online access.
Best of 2011: First Demonstration of Time Cloaking
In July, physicists created a “hole in time” using the temporal equivalent of an invisibility cloak.
December 28, 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.