Navigation Links
U of T physicists squeeze light to quantum limit
Date:1/6/2009

together inside an optical fibre, to create a triphoton. "A strange feature of quantum physics is that when several identical photons are combined, as they are in optical fibres such as those used to carry the internet to our homes, they undergo an "identity crisis" and one can no longer tell what an individual photon is doing," Steinberg says. The authors then squeezed the triphotonic state to glean the quantum information that was encoded in the triphotons polarization. (Polarization is a property of light which is at the basis of 3D movies, glare-reducing sunglasses, and a coming wave of advanced technologies such as quantum cryptography.)

In all previous work, it was assumed that one could squeeze indefinitely, simply tolerating the growth of uncertainty in the uninteresting direction. "But the world of polarization, like the Earth, is not flat," says Steinberg.

"A state of polarization can be thought of as a small continent floating on a sphere. When we squeezed our triphoton continent, at first all proceeded as in earlier experiments. But when we squeezed sufficiently hard, the continent lengthened so much that it began to "wrap around" the surface of the sphere," he says.

"To take the metaphor further, all previous experiments were confined to such small areas that the sphere, like your home town, looked as though it was flat. This work needed to map the triphoton on a globe, which we represented on a sphere providing an intuitive and easily applicable visualization. In so doing, we showed for the first time that the spherical nature of polarization creates qualitatively different states and places a limit on how much squeezing is possible," says Steinberg.

"Creating this special combined state allows the limits to squeezing to be properly studied," says Rob Adamson. "For the first time, we have demonstrated a technique for generating any desired triphoton state and shown that t
'/>"/>

Contact: Kim Luke
kim.luke@utoronto.ca
416-978-4352
University of Toronto
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. McGill physicists find a new state of matter in a transistor
2. Physicists tweak quantum force, reducing barrier to tiny devices
3. UBC physicists develop impossible technique to study and develop superconductors
4. Discovery by UC Riverside physicists could enable development of faster computers
5. New unifying theory of lasers advanced by physicists
6. Physicists saved from drowning in complexities of wetting theory
7. UM physicists show electrons can travel over 100 times faster in graphene than in silicon
8. Physicists discover how fundamental particles lose track of quantum mechanical properties
9. Physicists discover gold can be magnetic on the nanoscale
10. Sheet of carbon atoms acts like a billiard table, physicists find
11. Sheet of carbon atoms acts like a billiard table, physicists find
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/19/2014)... 2014 Biotech companies make announcements ... drug systems and advanced Laboratory Instrumentation. Companies in focus ... BDX ), Thermo Fisher Scientific Inc. (NYSE: ... RGDO ), Sangamo Biosciences Inc. (NASDAQ: ... Pressure BioSciences, Inc. (OTCQB: PBIO) ("PBI" or the "Company") ...
(Date:9/19/2014)... Cereal grain scientists, quality regulators, ... October 5–8, 2014, for the AACC International (AACCI) ... in Providence, Rhode Island. The comprehensive scientific program ... scientists, chemists, microbiologists, nutritionists, and those interested in ... To date, 1,000 attendees have registered for the ...
(Date:9/18/2014)... Austin, TX (PRWEB) September 18, 2014 ... of integrated urological and interventional radiology products and ... (also known as cryotherapy and cryoablation) versus external ... Mid-Atlantic Section of the American Urological Association (MAAUA) ... , "Comparing Relative Effectiveness of Cryosurgery and ...
(Date:9/18/2014)... Ireland , September 18, 2014 ... and Markets ( http://www.researchandmarkets.com/research/czvg3s/biocompatible ) has ... "Biocompatible Materials - Global Strategic Business ... ,     (Logo: http://photos.prnewswire.com/prnh/20130307/600769) ,This report analyzes ... in US$ Million by the following ...
Breaking Biology Technology:Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 2Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 3Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 4Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 5Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 6Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 7Latest Research on Cereal Grain Quality, Health Benefits and Food Production to be Presented During the AACC International Annual Meeting 2Latest Research on Cereal Grain Quality, Health Benefits and Food Production to be Presented During the AACC International Annual Meeting 3HealthTronics Announces Data Comparing Cryotherapy Versus Radiation for Treating Prostate Cancer Poster Presented at the American Urological Association Regional Meeting 2Biocompatible Materials - Global Strategic Business Report 2014 2Biocompatible Materials - Global Strategic Business Report 2014 3
... device developed by the University of Wisconsin-Madison Lidar (Light Detection ... (Ice, Cloud and Land Elevation Satellite) laser device. ... chosen for the test because it operates on the same ... instrument to study the climate and changing polar ice sheets ...
... I first met up with the team at Qurb (pronounced ... world needed another anti-spam product. Not that the spam problem ... products and services in the market, it simply seemed an ... different. , ,I'd first met the founders in 1997 ...
... conditions provide a golden opportunity to tune your talent ... to have calmed, the long-term winners will be those ... strategies. Real competitive advantage comes from making a ... aligning your talent management practice to that choice, even ...
Cached Biology Technology:UW-Madison Laser Device to Study Polar Ice Caps 2Qurb Gets a Step Up From Second-Time Entrepreneurs 2Qurb Gets a Step Up From Second-Time Entrepreneurs 3Qurb Gets a Step Up From Second-Time Entrepreneurs 4Talent Constellations or Talent Communities Choosing the Right Talent 2Talent Constellations or Talent Communities Choosing the Right Talent 3
(Date:9/18/2014)... team of researchers from McGill University and the ... of polyethylene ,microbeads, Canadian Journal of Fisheries ... originate from cosmetics, household cleansers, or industrial cleansers, ... Owing to their small size and buoyancy, they ... Microplastics are a global contaminant in the world,s ...
(Date:9/18/2014)... fall foliage season that prompts millions of Americans to undertake ... and possibly last a little longer within a century, according ... peeping in some areas of the United States as summer ... in the journal Global Ecology and Biogeography . For ... is the state tree of New Hampshire could change ...
(Date:9/18/2014)... researchers and their colleagues have built the first ... academic performance and behavioral trends. In other words, ... even if you don,t -- and how that ... students, happiness, stress, depression and loneliness to their ... general population for example, to monitor mental ...
Breaking Biology News(10 mins):Microplastic pollution discovered in St. Lawrence River sediments 2Fall foliage season may be later, but longer on warmer Earth 2Fall foliage season may be later, but longer on warmer Earth 3Fall foliage season may be later, but longer on warmer Earth 4New Dartmouth smartphone app reveals users' mental health, performance, behavior 2New Dartmouth smartphone app reveals users' mental health, performance, behavior 3New Dartmouth smartphone app reveals users' mental health, performance, behavior 4
... Rochelle, NY, January 29, 2009Two common strains of methicillin-resistant ... virtually eradicated in the laboratory by exposing them to ... photo-irradiation that is described in a paper published online ... . The article will appear in the April 2009 ...
... cases, sudden cardiac death (SCD) in young people is due ... by Silke Kauferstein of the Department of Forensic Medicine of ... the current Deutsches rzteblatt International ( Dtsch Arztebl ... defined as unexpected death occurring rapidlyusually within 1 h of ...
... discovered that a prototype drug reduces heart enlargement, one ... Heart failure, which occurs when the heart can,t ... people in the United States. The condition contributes to ... the laboratories of cardiologist and cell biologist Nipavan Chiamvimonvat, ...
Cached Biology News:Blue light destroys antibiotic-resistant staph infection 2UC Davis research shows that newly discovered drug reduces heart enlargement 2
... The Gene Pulser Xcell microbial ... Hz, is used for electroporation of ... includes the main unit, PC module ... chamber, 10 sterile cuvettes (5 each ...
... Epithelial and endothelial cells-directed transfection ... RGD peptide-conjugated polyethylenimine which allows ... epithelial and endothelial cells. Integrins ... cell-cell and cell-matrix adhesion processes. ...
AVOID FREEZE/THAW CYCLES. Recognizes the ~5 kDa thymosin beta4 protein....
... Complete Solution Polymorphic DNA Technologies offers ... a complete solution for SNP discovery by ... oligonucleotide primers, PCR amplification, DNA sequencing and ... For SNP discovery, Polymorphic uses the gold ...
Biology Products: