Hide An Event With Temporal Cloaking

A demonstration of temporal cloaking by researchers from the School of Applied and Engineering Physics, Cornell University, has been published in Nature. The authors propose to create a "time hole" to hide the occurrence of an event from the observer.


(Temporal cloaking device setup)

The key to the process is what's being termed a split time lens, which is matched with a dispersive medium. When activated, the lens takes the light that comes before the point of cloaking and shifts it to bluer wavelengths, which travel faster through the dispersive medium than the base speed of the light in the same medium. At the cloak point, the lens switches, shifting the light beam to longer, redder wavelengths. These travel through the dispersive medium more slowly.

The end result is that a gap develops in the beam of light as the blue light races ahead and the red light slows down. In this cloaking device, that gap maxes out at about 50 picoseconds, long enough for a very brief event to occur (in this case, the event was simply an interaction with a pulse from another laser). The light can then be sent through a dispersive medium with the opposite effect, slowing the bluish light back down while accelerating the red.

By the time it exits the device, the gap has been sealed back up and the effects of the wavelength shifts reversed. Any events that took place during the 50 picosecond gap (as long as they occur in both the right place and time) never happened, at least as far as the light beam that exits is concerned.

Star Trek fans may recall the Temporal Cold War, in which several time-traveling factions, each from different points in time, sought to manipulate history for its own benefit.

The Krenim weapon ship has a beam that can push objects out of the spacetime continuum, thereby erasing them from history. Archer and Daniels are shown below in the Temporal Observatory, a holigraphic representation of the timestream projected by a hand-held device.


(Archer and Daniel in the Temporal Observatory)

Read more at Ars Technica; thanks to Moira for sharing the tip and reference for this story.

Scroll down for more stories in the same category. (Story submitted 1/6/2012)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 3 )

Related News Stories - (" Engineering ")

ODYSSEUS Solar-Powered Stratospheric Plane Flies Forever
'The planes flew continuously, twenty-four hours a day...' - EB White, 1950.

Phil Nuyttnn's City Under The Sea
''Under the lower roof there was no water, but a clear and luminous atmosphere...' - Andre Laurie, 1895.

Stick-On Tape Speakers, As Predicted By Bruce Sterling
Flexible tape speakers, someday.

Has Climate Change Already Been Solved By Aliens?
'I had explained," said Nessus, "that our civilisation was dying in its own waste heat.' - Larry Niven, 1970.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

Wound Healing With Wearable Nanogenerators
'... forcing the energy transfer which allowed him to ... erase the other internal-external damage.'

Flying Dragon Robot Transforms In Mid-Air
Terrific prototype video.

Negative Matter Fluid Theorized In New Paper
'Of course, being negative matter, when you push it, it comes toward you..'

Grow Structures Upon Planetfall - Myco-Architecture
'They'll also start pulling in gases and liquids from the local atmosphere...'

MXene Hydrogel Skin For Robots Flexes And Senses
'The plastex swam and whirled like boiling toothpaste...'

EXPLORER, The First Total-Body Scanner
'The object is built up of an infinite series of plane layers, at the focus of the ray...'

UK Police AI To Stop Criminals Before They Strike
'... the computing mechanisms that studied and restructured the incoming material.'

Sonitus Audio Interface Positioned Beyond The Noise
'... an instrument having relatively small bit pieces adapted to be gripped between the teeth.'

Volvo's Self-Driving Mining Trucks
'A procession of automatic ore carts was racing over the bleak slag'

Audi Pop.Up Autonomous Electric Flying Car
'The cab was an egg-shaped bubble of light metals and plastics...'

Music Not Impossible (MNI) Vibrotactile Wearable Experience
Don't you want to experience the 'feely' effects?

Chinese Face Recognition Mistakes Bus Ad For Jaywalker
'... the imprint of her image on the telephoto cell.'

A Look Back At Apollo's Emergency Escape Vehicle
'A simple mechanism... it drove the iron ball through space like a ship.'

InMotion Glide 3 Electric Unicycle For The Last Mile
'...gyro-stabilized on a single wheel.'

China's Social Credit System - A Facebook-1984 Mashup
'Prestige, face, mana, repute, glory: the Sirenese word is strakh.'

Musk Declares Tesla Supercharger Capacity Will Double By Next Year
'Recharge the batteries... in almost every town and village...'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.