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:1/15/2014)... 2014 Freeslate, Inc ., the ... that Lupin Limited, one of India’s top five pharmaceutical ... PharmD System for high throughput solid form screening. ... on a wide range of quality, affordable generic and ...
(Date:1/14/2014)... 2014 Carahsoft and CDS Federal Services ... 2014 at 2pm EST (11am PST), “Natural Language Processing: ... on how technology can turn raw, heterogeneous data into ... agencies. The online webinar will last approximately one hour. ...
(Date:1/14/2014)... New York, NY (PRWEB) January 14, 2014 ... coverage of Alliqua, Inc. (OTCQB: ALQA). Alliqua is an ... products to serve the wound care market. , Free ... Alliqua was restructured with a seasoned management team and ...
(Date:1/14/2014)... Toronto, Canada (PRWEB) January 14, 2014 ... and its motives and methods in product development and ... of the industry. This mistrust, fueled by concerns about ... further fed by reports of spectacular fines to the ...
Breaking Biology Technology:Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3
... molecules in a living cell is something that has long ... diamond, may well be able to do this and potentially ... for, hard-to-cure diseases such as cancer. In a ... Physics and the German Physical Society,s New Journal of ...
... & Co. Inc., a unit of Oppenheimer Holdings, is pleased ... as Managing Director in the Healthcare group of the Firm,s ... science business. He will report to Brian McCarthy, Managing Director ... 2003, Matthias had worked at JMP Securities, where he was ...
... FREMONT, Calif., May 18, 2011 Biomerix Corporation and ... Biomerix 3D Scaffold , a novel three-dimensional tissue ... the Biomerix 3D Scaffold to research institutions across Europe. ... polycarbonate polyurethane , the Biomerix 3D Scaffold is ...
Cached Biology Technology:'Critical baby step' taken for spying life on a molecular scale 2Biomerix Corporation Reaches European Distribution Agreement with Cellon S.A. 2
(Date:4/22/2014)... lead a five-year, $3 million study to determine whether ... transport of dissolved organic matter (DOM) through the Connecticut ... chemical composition and water quality of the watershed and ... Science Foundation,s MacroSystems Biology program, researchers will collect data ... in Canada and runs through five U.S. states, before ...
(Date:4/22/2014)... JUPITER, FL, April 22, 2014 Scientists from the ... identified a protein complex that plays a critical but ... , The study, which showed a novel role for ... 2014 in the journal eLife , a publisher ... Planck Society and the Wellcome Trust. , "This is ...
(Date:4/22/2014)... Inspired by the fist-like club of a mantis ... California, Riverside, in collaboration with University of Southern California ... composite materials that is more impact resistant and tougher ... we study the club of this tiny crustacean, the ... things we use every day," said David Kisailus, a ...
Breaking Biology News(10 mins):Connecticut River watershed study will assess impacts of extreme rain events 2Connecticut River watershed study will assess impacts of extreme rain events 3Scientists identify critical new protein complex involved in learning and memory 2Mantis shrimp stronger than airplanes 2Mantis shrimp stronger than airplanes 3
... MA Obesity is associated with a worse prostate ... genetic mutation, suggest results from a new study led ... Institute and Brigham and Women,s Hospital researchers. Among prostate ... a more than 50% increased risk of dying from ...
... trash could spell big trouble for marine life, starting with ... and the University of Exeter who report their evidence in ... Current Biology on December 2. Those marine worms play ... for other animals. Work by Stephanie Wright from the ...
... Vicente was recently awarded a grant of more than $2 ... continue Phase III of the Initiative for Maximizing Student Development, ... of Chemistry and Professor of Chemotherapy/Materials in the Department of ... the IMSD Program is giving us the opportunity to continue ...
Cached Biology News:Genetic mutation may play key role in risk of lethal prostate cancer in overweight patients 2Microplastics make marine worms sick 2LSU receives $2 million from NIH for biomedical sciences training for underrepresented students 2
delta-like 1 homolog (Drosophila)...
...
... BMH 71-18 mutS and ES1301 mutS ... coli. Use of these strains prevents repair ... leading to high mutation efficiencies and making ... GeneEditor and Altered Sites II Mutagenesis Systems. ...
Polaroid black & white positive, 3 x 4 inch pack film, ISO 3000/ 36 ASA DIN (20 expsures). For use in the Polaroid Direct Copy Camera (PHC34)....
Biology Products: