Quantum logic clock: Difference between revisions
m Hyperlinked "(...) laser (...)". Please feel free to undo this change motivating your decision. If you feel like publicly scolding me... well... please DO NOT! Kindly send me an email instead. Thanks. |
m Hyperlinked "(...) 37 (...)" with the "37_(number)#In_mathematics" article. For number theory purposes I guess this hyperlink has some importance. But plz F33L F3 2 undo diz change. Thank you. |
||
| Line 1: | Line 1: | ||
A '''quantum clock''' is a type of clock that confines aluminum and beryllium ions together in an electromagnetic trap and slowed by [[laser]]s to near [[absolute zero]] temperatures. Developed by physicist Chin-wen Chou of [[National Institute of Standards and Technology]], the clock is 37 times more precise than the existing international standard.<ref>{{Citation | last = Ghose | first = Tia | author-link = http://www.wired.com/wiredscience/author/tiaghose/ | title = Ultra-Precise Quantum-Logic Clock Puts Old Atomic Clock to Shame | date = 02-05-10 | url = http://www.wired.com/wiredscience/2010/02/quantum-logic-atomic-clock/ | accessdate = 02-07-10 }}</ref> Both the aluminum based Quantum Clock and the mercury based Atomic clock keep track of time from the ion vibration at an optical frequency by using a [[Ultraviolet#Lasers|UV laser]], that is 100,000 times higher than the microwave frequencies used in [[NIST-F1]] and other similar time standards around the world. Quantum clocks like this are able to divide time into smaller units and can be far more precise than microwave standards. |
A '''quantum clock''' is a type of clock that confines aluminum and beryllium ions together in an electromagnetic trap and slowed by [[laser]]s to near [[absolute zero]] temperatures. Developed by physicist Chin-wen Chou of [[National Institute of Standards and Technology]], the clock is [[37_(number)#In_mathematics|37]] times more precise than the existing international standard.<ref>{{Citation | last = Ghose | first = Tia | author-link = http://www.wired.com/wiredscience/author/tiaghose/ | title = Ultra-Precise Quantum-Logic Clock Puts Old Atomic Clock to Shame | date = 02-05-10 | url = http://www.wired.com/wiredscience/2010/02/quantum-logic-atomic-clock/ | accessdate = 02-07-10 }}</ref> Both the aluminum based Quantum Clock and the mercury based Atomic clock keep track of time from the ion vibration at an optical frequency by using a [[Ultraviolet#Lasers|UV laser]], that is 100,000 times higher than the microwave frequencies used in [[NIST-F1]] and other similar time standards around the world. Quantum clocks like this are able to divide time into smaller units and can be far more precise than microwave standards. |
||
The clock loses one second every 3.4 billion years, while the current international standard NIST-F1 caesium fountain atomic clock loses a second every 100 million years. Chou's team can't actually measure clock ticks per second because the definition of a second is based on the NIST-F1 which cannot measure a more precise machine. "The aluminum clock is very accurate because it is insensitive to background magnetic and electric fields, and also to temperature".<ref>{{Citation | author-link = http://www.azonano.com | title =Quantum Clock Proves to be as Accurate as World's Most Accurate Clock | date =7th March 2008 | url = http://www.azonano.com/news.asp?newsID=6031 | accessdate= 2-7-10 }}</ref> |
The clock loses one second every 3.4 billion years, while the current international standard NIST-F1 caesium fountain atomic clock loses a second every 100 million years. Chou's team can't actually measure clock ticks per second because the definition of a second is based on the NIST-F1 which cannot measure a more precise machine. "The aluminum clock is very accurate because it is insensitive to background magnetic and electric fields, and also to temperature".<ref>{{Citation | author-link = http://www.azonano.com | title =Quantum Clock Proves to be as Accurate as World's Most Accurate Clock | date =7th March 2008 | url = http://www.azonano.com/news.asp?newsID=6031 | accessdate= 2-7-10 }}</ref> |
||
Revision as of 11:59, 14 January 2011
A quantum clock is a type of clock that confines aluminum and beryllium ions together in an electromagnetic trap and slowed by lasers to near absolute zero temperatures. Developed by physicist Chin-wen Chou of National Institute of Standards and Technology, the clock is 37 times more precise than the existing international standard.[1] Both the aluminum based Quantum Clock and the mercury based Atomic clock keep track of time from the ion vibration at an optical frequency by using a UV laser, that is 100,000 times higher than the microwave frequencies used in NIST-F1 and other similar time standards around the world. Quantum clocks like this are able to divide time into smaller units and can be far more precise than microwave standards.
The clock loses one second every 3.4 billion years, while the current international standard NIST-F1 caesium fountain atomic clock loses a second every 100 million years. Chou's team can't actually measure clock ticks per second because the definition of a second is based on the NIST-F1 which cannot measure a more precise machine. "The aluminum clock is very accurate because it is insensitive to background magnetic and electric fields, and also to temperature".[2]
In February 2010, NIST physicists built a second, enhanced, version of the quantum logic clock using a single aluminum atom. Considered the world's most precise clock, it offers more than twice the precision of the original.[3]
References
- ^ Ghose, Tia (02-05-10), Ultra-Precise Quantum-Logic Clock Puts Old Atomic Clock to Shame, retrieved 02-07-10
{{citation}}: Check|author-link=value (help); Check date values in:|accessdate=and|date=(help); External link in|author-link= - ^ Quantum Clock Proves to be as Accurate as World's Most Accurate Clock, 7th March 2008, retrieved 2-7-10
{{citation}}: Check date values in:|accessdate=and|date=(help); External link in|author-link= - ^ NIST's Second 'Quantum Logic Clock' Based on Aluminum Ion is Now World's Most Precise Clock, NIST, February 4, 2010