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.
"If you mod me down, I will become more insightful than you can possibly imagine." -- Slashdot
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
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
Samsung Reports that a Small Number of Galaxy S5 Smartphones Shipped with Broken Cameras
April 28, 2014, 10:00 AM
Creationists are Mad About Google Doodle Depicting Evolution
November 24, 2015, 8:48 PM
DHS and TSA: Whoops, We Missed That 73 Airport Employees May be Terrorists
November 19, 2015, 2:16 PM
Star Wars Spinoff Film "Rogue One", Theme Park Attractions Announced
August 17, 2015, 12:20 PM
SpaceX Falcon 9's Seventh Supply Mission to ISS Ends w/ Fiery Stage 1 Explosion
June 28, 2015, 1:10 PM
Cool Science Video: Glowing Millipede Prowls the Nevada Desert
May 18, 2015, 12:00 PM
Newly Discovered Costa Rican Glass Frog is Kermit's Doppelgänger
April 22, 2015, 11:26 AM
Most Popular Articles
Smart Security Cameras: 5 Good Choices For Any Budget
July 25, 2016, 7:13 PM
2017 Porsche Panamera: I’ll Take Three of These.
July 24, 2016, 6:44 PM
Free Windows 10 offer ends July 29th, 2016: 10 Reasons to Upgrade Immediately
July 22, 2016, 9:19 PM
Top 5 Smart Watches
July 21, 2016, 11:48 PM
5 Excellent Cable Modems: Buy Your Own and Avoid Rental Fees
July 28, 2016, 8:44 PM
Latest Blog Posts
Sceptre Airs 27", 120 Hz. 1080p Monitor/HDTV w/ 5 ms Response Time for $220
Dec 3, 2014, 10:32 PM
Costco Gives Employees Thanksgiving Off; Wal-Mart Leads "Black Thursday" Charge
Oct 29, 2014, 9:57 PM
"Bear Selfies" Fad Could Turn Deadly, Warn Nevada Wildlife Officials
Oct 28, 2014, 12:00 PM
The Surface Mini That Was Never Released Gets "Hands On" Treatment
Sep 26, 2014, 8:22 AM
ISIS Imposes Ban on Teaching Evolution in Iraq
Sep 17, 2014, 5:22 PM
More Blog Posts
Copyright 2016 DailyTech LLC. -
Terms, Conditions & Privacy Information