Navigation Links
NIST's second 'quantum logic clock' based on aluminum ion is now world's most precise clock
Date:2/4/2010

her than microwave frequencies used in NIST-F1 and other similar time standards around the world. Optical clocks thus divide time into smaller units, and could someday lead to time standards more than 100 times as accurate as today's microwave standards. Higher frequency is one of a variety of factors that enables improved precision and accuracy.

Aluminum is one contender for a future time standard to be selected by the international community. NIST scientists are working on five different types of experimental optical clocks, each based on different atoms and offering its own advantages. NIST's construction of a second, independent version of the logic clock proves it can be replicated, making it one of the first optical clocks to achieve that distinction. Any future time standard will need to be reproduced in many laboratories.

NIST scientists evaluated the new logic clock by probing the aluminum ion with a laser to measure the exact "resonant" frequency at which the ion jumps to a higher-energy state, carefully accounting for all possible deviations such as those caused by ion motions. No measurement is perfect, so the clock's precision is determined based on how closely repeated measurements can approach the atom's exact resonant frequency. The smaller the deviations from the true value of the resonant frequency, the higher the precision of the clock.

Physicists also evaluate the performance of new optical clocks by comparing them to older optical clocks. In this case, NIST scientists compared their two logic clocks by using the resonant laser frequency from one clock to probe the ion in the other clock. Fifty-six separate comparisons were made, each lasting between 15 minutes and 3 hours.

The two logic clocks exhibit virtually identical "tick" ratesdifferences don't show up until measurements are extended to 17 decimal places. The agreement between the two aluminum clocks is more than 10 times closer than any previous two
'/>"/>

Contact: Laura Ost
laura.ost@nist.gov
303-497-4880
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. Dynavax Issued Landmark Patent Covering Second-Generation TLR9 Agonists
2. BitWine (TM) Nutrition Advisors Network Expands Roster of Licensed Dietitians and Nutritionists
3. Pharmos Announces Agreement to Sell Certain CB2 Selective Agonists
4. Healthcare Technologies Reports Loss for 2007 Second Quarter & Six Months Results
5. Skystar Bio-Pharmaceutical Announces Second Quarter 2007 Results
6. China Biopharmaceuticals Holdings Announces Second Quarter 2007 Financial Results
7. Dragon Pharmaceutical Reports Growth in Sales and Profits during Second Quarter of 2007
8. Carrington Reports Second Quarter 2007 Results
9. Response Genetics Reports Second Quarter 2007 Financial Results
10. Cadence Pharmaceuticals Reports Second Quarter 2007 Financial Results
11. Transgenomic, Inc. Reports Second Quarter 2007 Results
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
NIST's second 'quantum logic clock' based on aluminum ion is now world's most precise clock
(Date:8/28/2014)... A new research platform uses a laser ... structures undergoing stress and heating, an approach ... for microelectronics and batteries., This new technique, ... how heating and the surface stress of ... have discussed the merits of surface-stress influence ...
(Date:8/28/2014)... SunTrust Robinson Humphrey (STRH) today announced the ... research team in biotechnology and oilfield services.  ... demonstrates our commitment to providing our valued institutional ... decision making," said Biff Woodruff , Head ... significant investments in differentiated content at a time ...
(Date:8/28/2014)... 28, 2014 A new market ... world is available from Strategic Consulting, Inc., the ... Industrial Microbiology Market Review, Fourth Edition: Global Review ... (IMMR—4) tracks and compares microbiology test volumes, market ... Europe and Asia, and forecasts future volumes and ...
(Date:8/27/2014)... Salt Lake City, Utah (PRWEB) August 27, 2014 ... new construction that will expand its current Salt Lake ... operations currently underway outside of Utah to ultimately create ... the next 20 years. , “Utah is home ... many of whom can be credited with Varian’s success ...
Breaking Biology Technology:New analytical technology reveals 'nanomechanical' surface traits 2New analytical technology reveals 'nanomechanical' surface traits 3SunTrust Robinson Humphrey Expands Equity Research in Healthcare and Energy 2SunTrust Robinson Humphrey Expands Equity Research in Healthcare and Energy 32 Billion Industrial Microbiology Tests Conducted for Product Quality and Safety Worldwide 22 Billion Industrial Microbiology Tests Conducted for Product Quality and Safety Worldwide 3Varian Medical Systems Groundbreaking on Facility Expansion Triggers Influx of New Jobs to Salt Lake 2Varian Medical Systems Groundbreaking on Facility Expansion Triggers Influx of New Jobs to Salt Lake 3
... the promising field of cell therapy, in which cells are ... and tissue defects, researchers at Brigham and Women,s Hospital (BWH) ... challenges associated with the procedure: control of the cells and ... the journal Biomaterials on January 26, the team ...
... Feb. 2, 2011 Forensic DNA profiling has become ... in the aftermath of mass violence and disaster, but ... identify and analyze the major ethical and policy challenges ... (Logo: http://photos.prnewswire.com/prnh/20020422/CMULOGO) The National Institutes ...
... Elixir Bio-Tech Inc. (EBT), a New Mexico Algae Biotech ... winners of the FundingPost,s 7th annual "Pitching Across America™" ... Biomass Feedstock project in Luna County, NM to demonstrate ... and Patent Pending Technology for Open and Closed Algae ...
Cached Biology Technology:Engineered cells could usher in programmable cell therapies 2Engineered cells could usher in programmable cell therapies 3CMU Receives $1.2 Million NIH Grant To Develop Ethics, Policy Recommendations for Post-Conflict, Post-Disaster DNA ID Practices 2CMU Receives $1.2 Million NIH Grant To Develop Ethics, Policy Recommendations for Post-Conflict, Post-Disaster DNA ID Practices 3CMU Receives $1.2 Million NIH Grant To Develop Ethics, Policy Recommendations for Post-Conflict, Post-Disaster DNA ID Practices 4Elixir Bio-Tech Inc. Elected One of Top 50 Emerging Companies by 100 Venture Capital Funds & Angel Investors 2
(Date:8/28/2014)... MD FASEB MARC (Maximizing Access to Research ... for the Genetics Society of America,s 27th Annual ... October 3, 2014 in Pacific Grove, California. ... of students, post doctorates and scientists from underrepresented ... community and to encourage the participation of young ...
(Date:8/28/2014)... identified the developmental on-off switch for Streptomyces , ... two-thirds of the world,s naturally derived antibiotic medicines. ... it is possible to manipulate this switch to make ... appearing August 28 in Cell , found that ... and a larger protein called BldD ultimately controls whether ...
(Date:8/28/2014)... unique method for delivering compounds that could ... and AIDS may be possible, thanks to ... Sciences., A semi-soft vaginal suppository made from ... with the antiviral drug Tenofovir provides a ... the spread of sexually transmitted infections during ...
Breaking Biology News(10 mins):Small molecule acts as on-off switch for nature's antibiotic factory 2Small molecule acts as on-off switch for nature's antibiotic factory 3Sensory-tested drug-delivery vehicle could limit spread of HIV, AIDS 2Sensory-tested drug-delivery vehicle could limit spread of HIV, AIDS 3
... LANSING, Mich. Michigan State University has been awarded ... the data coordinating center for the largest epidemiological study ... established in 2001 and now part of the university,s ... a repository for data from nearly 3,000 families as ...
... the winners of the 2009 SIB Best Graduate Paper and ... Basel Computational Biology Conference. **2009 SIB Young Bioinformatician ... Young Bioinformatician Award is SIB Member Lukas Burger, 29, who ... SIB in the Bioinformatics and Systems Biology Group led by ...
... the Louisiana Universities Marine Consortium, Louisiana State University, and the ... the coast of Louisiana and Texas in the Gulf of ... record. The dead zone is an area in the Gulf ... support most life in bottom and near-bottom waters. Scientists ...
Cached Biology News:MSU lands $2.1 million grant to take part in national autism study 2The SIB recognizes the next generation of bioinformaticians 2The SIB recognizes the next generation of bioinformaticians 3NOAA forecast predicts large 'dead zone' for Gulf of Mexico this summer 2NOAA forecast predicts large 'dead zone' for Gulf of Mexico this summer 3
... The PhosphatidylEthanolamine-Binding Protein (PEBP) does not ... protease inhibitors. PEBP is expressed ... testis, ovary, muscle, and stomach. ... in is exerting inhibitory activity against ...
...
Highly sensive assay for detecting apoptosis in living cells. See detailed descriptions above in K250-25....
Request Info...
Biology Products: