Temporal Cloak Hides Events for a Fleeting Moment
October 14, 2011 7:03 AM
comment(s) - last by
Experiment would need to be on planetary or interplanetary scale to provide macroscopic results
In science fiction, it's not uncommon for an event in history to be changed or removed by some sort of
or time altering technology. That fiction may someday become reality with a new breakthrough made at Cornell University that has been described as a "history editor." Granted the history that the cloaking technique has been able to hide is a tiny fraction of a second.
The researchers include Moti Fridman and colleagues and the experiment was the first to demonstrate a theory described a year ago by Martin McCall and colleagues at the Imperial College in London. The Cornell researchers sent a beam of light traveling down an optical fiber that went through what the team dubbed "time lenses."
In the space between the two lenses, the team was able to create a bubble in the light for a tiny moment that function like a temporal hole. That is a fancy way of saying that the beam of light never existed for a tiny fraction of a second. As the beam passes though the split-time lens it accelerates near the center and slows down near the edges causing a bubble. The second lens in the series is able to create the opposite effect and returns the beam to normal.
In testing, the team shot pulses of laser light between the two lenses and they were recorded at a constant rate of 41 kilohertz when the cloak was turned off. When the cloak was turned on and synchronized with the light pulses all signs that the pulses took place were erased. The area that was cloaked was tiny at only 6mm long and lasted only 20 trillionths of a second. A longer duration for the cloak would have created turbulence and revealed that the event occurred.
The team says that to create a measurable macroscopic effect using the cloak the experiment would need to be on the planetary or perhaps interplanetary scale.
This article is over a month old, voting and posting comments is disabled
10/14/2011 12:29:43 PM
Doesn't mess with time at all, just the timing of light coming from an object. Imagine you have a safe sitting on a table for 10 minutes and someone watching it. With an extreme version of this system you could make the first 5 minutes of the safe sitting there stretch to fill the full 10 minutes of viewing for the observer. A thief could steal something out of the safe in the 'missing' 5 minutes, but the light from that event would never reach the observer.
10/14/2011 4:18:09 PM
Only problem with that, is if you "stretch" out the light, you'll red shift it. Now, you could capture a burst light and route it in a circle feeding only a small percentage to the viewer over time, thus "stretching" out the instance over time over which you see the object's light, but that should cause dimming: growing with the smaller the fraction of light you give the observer from the available pool.
But, that doesn't sound like what this experiment was.
Either way, the reporting I've seen elsewhere is incredibly misleading about the nature of this work, which always rankles my scientific sensibilities.
10/17/2011 1:28:58 PM
Maybe the theft of a safe isn't what you'd want to cloak. Maybe it's some kind of communication signal? Just thinking out loud.
"You can bet that Sony built a long-term business plan about being successful in Japan and that business plan is crumbling." -- Peter Moore, 24 hours before his Microsoft resignation
Invisible Cloaking Device Created Using Mirage Effect
October 5, 2011, 9:41 PM
Latest By Shane McGlaun
Windows Phone Sales Grow, But Market Share Continues to Lag Behind Competition
May 7, 2014, 9:39 AM
MSI Launches GS60 Ghost Pro 3K, GS70 Stealth Pro Gaming Notebooks
May 6, 2014, 12:00 PM
Apple to Launch Major Upgrade to Help Boost Sales Ahead of iPhone 6 Launch
May 6, 2014, 9:44 AM
Vermont Congressman Wants Federal EV Tax Credit Increased to $10,000
May 5, 2014, 8:37 AM
Eithad Airlines Offers the First Three-Room Suite on a Commercial Airliner
May 5, 2014, 8:13 AM
PayPal Prepares Polished Brand Image with New Marketing Push
May 1, 2014, 10:51 AM
Report: AT&T Eyeing $40B DirecTV Purchase
May 1, 2014, 8:00 AM
Student Gmail Accounts No Longer Scanned for Targeted Ads
April 30, 2014, 10:31 AM
Samsung Galaxy K zoom Smartphone Gets Official, Offers 10x Optical Zoom
April 30, 2014, 9:53 AM
Google Autonomous Vehicles Are Working On Mastering City Street Driving
April 28, 2014, 10:25 AM
Temple University Researchers Hit the Delete Button on HIV, Remove it from Human Cells
July 22, 2014, 7:39 AM
Airbus Shows Off All-Electric E-Fan 2.0 Airplane, Plans Production in 2017
July 21, 2014, 9:29 AM
Buzz Aldrin Says First Astronauts to Set Foot on Mars Should Never Return Home
July 9, 2014, 9:46 AM
Women May Soon Be Able to Control Their Fertility via Remote Control
July 7, 2014, 10:14 AM
Tiny "Bio-bots" Powered by Muscle Cells, Electrical Pulses
July 3, 2014, 7:00 PM
Boston Using Solar-Powered Benches as Phone Charging Stations
July 1, 2014, 1:09 PM
Most Popular Articles
Microsoft Kills Entertainment Unit, May Shelve Flagship Lumia "McLaren"
July 18, 2014, 7:40 PM
Boeing 777 Malaysian Airlines Flight 17 Crashes in Ukraine
July 17, 2014, 1:00 PM
Google Signs Controversial Deal With Pharmaceutical Giant Novartis
July 16, 2014, 7:32 PM
Toyota Scientist: Autonomous Vehicles May Lead to Increased Fuel Consumption, Pollution
July 18, 2014, 2:42 PM
JJ Abrams Unveils X-Wing Starfighter for New "Star Wars" Movie
July 21, 2014, 12:24 PM
Latest Blog Posts
Space Terrorism is a Looming Threat For the United States
Apr 23, 2014, 7:47 PM
Facebook Aims to Provide Internet to "Every Person in the World" with Drones, Satellites
Apr 1, 2014, 10:20 AM
Retail Mobile Sites Experience Outages in Light of Simplexity's Bankruptcy
Mar 14, 2014, 8:48 AM
Tesla vs. BMW: Who Has the Safer EV?
Feb 1, 2014, 2:56 PM
Justice Leaks Details of Next HTC One Two Flagship Phone
Dec 5, 2013, 4:04 PM
More Blog Posts
Copyright 2014 DailyTech LLC. -
Terms, Conditions & Privacy Information