The cloak will temporarily allow you to disguise events

We've all heard about cloaks of invisibility, which in theory can hide objects from sight. But a team of scientists from Purdue University have created a cloak of time that can hide events.

While invisibility cloaks make objects disappear from sight, a time cloak makes events disappear in time. To do this, the researchers used a laser beam at two frequencies to send photons through a single fiber. One of the lasers was tuned in such a way to effectively mask the other — this means that you can read the information of the second beam only if you know how to look. Here is a rough explanation:

"Imagine a convoy of vehicles, which sometimes slows down to create a small passage for safe crossing of pedestrians. When the cars pass pedestrians in front, accelerate and join the rest of the traffic, no one can say that the stream was a tear — the presence of pedestrians masked. Just can be changed the path of photons to create brief moments in which to hide information."

Actually, this is not the first time the events were disguised — but they were first masked so that people could learn about them if I wanted to. In the past they hid them so well that they are generally gone forever. New "cloak" has shown himself at work in the field of communication, allowing to deliver certain messages and offset by any attempts to extract information from the outside. The results of the study were published in Optica and interpreted by New Scientist.

If you think that such a "cloak" is perfect for covert communication, you are not alone.

"With this new device, we think not only prevent the unwanted information, but simply to provide a link, commented Joseph Lukens, one of the scientists who created the "cloak". — One person will not see anything, the other will see everything."

Source: hi-news.ru