Navigation Links
Long distance, top secret messages
Date:10/19/2010

WASHINGTON, Oct. 19 When the military needs to send the key to encrypted data across the world, it can't necessarily rely on today's communication lines, where the message could be covertly intercepted. But physicists at the Georgia Institute of Technology in Atlanta are developing a new, more secure way to send such information across far distances, using existing cables and the laws of quantum mechanics.

Alex Kuzmich and colleagues have built a critical component of a quantum repeater, a device that allows quantum communications -- such as the encryption keys used to encode data transmitted over traditional lines -- to be relayed over larger distances. They will describe this device at the Optical Society's (OSA) 94th annual meeting, Frontiers in Optics (FiO) 2010, at the Rochester Riverside Convention Center in Rochester, N.Y., from Oct. 24-28.

Quantum cryptography is an emerging technology currently used by both military and financial organizations to send information as entangled particles of light. In theory, anyone who tries to tap into this information changes it in a way that reveals their presence.

A quantum repeater is similar to a transformer on a traditional power line. Instead of converting electricity, it regenerates a communication signal to prevent it from degrading over distance. It contains two banks of memory, one to receive an entangled message and a second line to copy it.

Previously, the longest distance over which an encrypted key could be sent was approximately 100 kilometers. The new technology developed by the Georgia Tech team increases 30-fold the amount of time the memory can hold information, which means that series of these devices -- arrayed like Christmas lights on a string -- could reach distances in excess of 1,000 kilometers.

"This is another significant step toward improving quantum information systems based on neutral atoms. For quantum repeaters, most of the basic steps have now been made, but achieving the final benchmarks required for an operating system will require intensive optical engineering efforts," says Kuzmich.

Their device also converts the photons used in quantum devices from an infrared wavelength of 795 nm to a wavelength of 1,367 nm. This wavelength is used in traditional telecommunications lines, so the new device could someday plug into existing fiber optic cables.

"In order to preserve the quantum entanglement, we perform conversion at very high efficiency and with low noise," says Alexander Radnaev, who also works on this project at Georgia Tech.


'/>"/>

Contact: Lyndsay Basista
lbasista@osa.org
202-416-1930
Optical Society of America
Source:Eurekalert

Related biology technology :

1. Major disease-vector mosquito reveals the secrets of its immune system
2. Feast and famine: MRI reveals secrets of animal anatomy
3. Secrets of a chiral gold nanocluster unveiled
4. Chemical analyses uncover secrets of an ancient amphora
5. Biomoda Board of Directors Names New Corporate Secretary
6. Secrets of insect flight revealed
7. DNA2.0 Unlocks The Secrets Of Optimized Gene Design: Company Identifies Codon Choice Design Principles for Optimal Protein Expression
8. Charging ahead: University of Houston team revealing secrets of electricity-producing materials
9. EnVivo Pharmaceuticals Announces Reversal of Cognitive Deficits in Alzheimers Disease Transgenic Mouse Model With Gamma-Secretase Modulator
10. Former Secretary of Veterans Affairs James Peake to Join the Cellphire Board of Directors
11. AEterna Zentaris Acquires All Assets from Ardana for Growth Hormone Secretagogue Compound, AEZS-130
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/10/2017)... ... 10, 2017 , ... The Pittcon Program Committee is pleased ... scientists who have made outstanding contributions to analytical chemistry and applied spectroscopy. Each ... leading conference and exposition for laboratory science, which will be held February 26-March ...
(Date:10/9/2017)... ... 09, 2017 , ... The award-winning American Farmer television series will feature 3 ... airs Tuesdays at 8:30aET on RFD-TV. , With global population estimates nearing ten ... to continue to feed a growing nation. At the same time, many of our ...
(Date:10/9/2017)... Phoenix, Arizona (PRWEB) , ... October 09, 2017 ... ... of Kindred, a four-tiered line of medical marijuana products targeting the needs of ... production and packaging of Kindred takes place in Phoenix, Arizona. , As operators ...
(Date:10/7/2017)... ... October 06, 2017 , ... ... consulting for microscopy and surface analysis, Nanoscience Instruments is now expanding into ... a broad range of contract analysis services for advanced applications. Services will ...
Breaking Biology Technology:
(Date:6/14/2017)... , June 15, 2017  IBM (NYSE: IBM ) is ... tech event dedicated to developing collaboration between startups and global ... June 15-17. During the event, nine startups will showcase the ... in various industries. France ... international market, with a 30 percent increase in the number ...
(Date:4/24/2017)... WASHINGTON , April 24, 2017 ... counsel and partner with  Identity Strategy Partners, LLP ... "With or without President Trump,s March 6, ... Foreign Terrorist Entry , refugee vetting can be instilled ... refugee resettlement. (Right now, all refugee applications are ...
(Date:4/13/2017)... According to a new market research report "Consumer ... Administration, and Authorization), Service, Authentication Type, Deployment Mode, Vertical, and Region - ... to grow from USD 14.30 Billion in 2017 to USD 31.75 Billion ... ... MarketsandMarkets Logo ...
Breaking Biology News(10 mins):