Invisibility ‘time cloak’ developed

Scientists were able to hide data sent by optical transmission

An “invisibility” time cloak which is able to hide events in a continuous stream of light has been developed by scientists.

The cloak works by manipulating the speed of light in optical fibres and means any interaction which takes place during this “hole in time” is not detected.

That is, a beam of light can be manipulated along its path.

The study is published in the journal Nature.

The research builds upon a time cloak described last year which was only able to hide single brief events of time in an optical beam.

Hidden data

This work is different to other “invisibility cloaks” in that it hides events in time, rather than spatial objects – which similar efforts have looked into.

The team from the Purdue University in Indiana have shown they can hide events in the path of a continuous light beam by having several “holes in time”.

They were able to cloak nearly half the data put in the beam’s path, which they would otherwise be able to detect.

Cloaking, just as it sounds is where an object or event is hidden from vision. This can apply to frequencies of light or sound. For example, stealth war planes can be difficult to detect on enemy radar.

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