Matches in SemOpenAlex for { <https://semopenalex.org/work/W2952629437> ?p ?o ?g. }
Showing items 1 to 75 of
75
with 100 items per page.
- W2952629437 abstract "We describe experiments with an optical frequency standard based on a laser cooled $^{171}$Yb$^+$ ion confined in a radiofrequency Paul trap. The electric-quadrupole transition from the $^2S_{1/2}(F=0)$ ground state to the $^2D_{3/2}(F=2)$ state at the wavelength of 436 nm is used as the reference transition. In order to compare two $^{171}$Yb$^+$ standards, separate frequency servo systems are employed to stabilize two probe laser frequencies to the reference transition line centers of two independently stored ions. The experimental results indicate a relative instability (Allan standard deviation) of the optical frequency difference between the two systems of $sigma_y(1000 {rm s})=5cdot 10^{-16}$ only, so that shifts in the sub-hertz range can be resolved. Shifts of several hertz are observed if a stationary electric field gradient is superimposed on the radiofrequency trap field. The absolute optical transition frequency of Yb$^+$ at 688 THz was measured with a cesium atomic clock at two times separated by 2.8 years. A temporal variation of this frequency can be excluded within a $1sigma$ relative uncertainty of $4.4cdot 10^{-15}$ yr$^{-1}$. Combined with recently published values for the constancy of other transition frequencies this measurement provides a limit on the present variability of the fine structure constant $alpha$ at the level of $2.0cdot 10^{-15}$ yr$^{-1}$." @default.
- W2952629437 created "2019-06-27" @default.
- W2952629437 creator A5001147801 @default.
- W2952629437 creator A5023074244 @default.
- W2952629437 creator A5030333928 @default.
- W2952629437 creator A5049821576 @default.
- W2952629437 creator A5066527323 @default.
- W2952629437 creator A5070668664 @default.
- W2952629437 date "2005-04-14" @default.
- W2952629437 modified "2023-09-27" @default.
- W2952629437 title "Frequency comparisons and absolute frequency measurements of 171Yb+ single-ion optical frequency standards" @default.
- W2952629437 hasPublicationYear "2005" @default.
- W2952629437 type Work @default.
- W2952629437 sameAs 2952629437 @default.
- W2952629437 citedByCount "2" @default.
- W2952629437 crossrefType "posted-content" @default.
- W2952629437 hasAuthorship W2952629437A5001147801 @default.
- W2952629437 hasAuthorship W2952629437A5023074244 @default.
- W2952629437 hasAuthorship W2952629437A5030333928 @default.
- W2952629437 hasAuthorship W2952629437A5049821576 @default.
- W2952629437 hasAuthorship W2952629437A5066527323 @default.
- W2952629437 hasAuthorship W2952629437A5070668664 @default.
- W2952629437 hasConcept C106289968 @default.
- W2952629437 hasConcept C120665830 @default.
- W2952629437 hasConcept C121332964 @default.
- W2952629437 hasConcept C131221115 @default.
- W2952629437 hasConcept C145148216 @default.
- W2952629437 hasConcept C184779094 @default.
- W2952629437 hasConcept C185544564 @default.
- W2952629437 hasConcept C196597080 @default.
- W2952629437 hasConcept C39984356 @default.
- W2952629437 hasConcept C519659679 @default.
- W2952629437 hasConcept C60799052 @default.
- W2952629437 hasConcept C62520636 @default.
- W2952629437 hasConcept C6260449 @default.
- W2952629437 hasConceptScore W2952629437C106289968 @default.
- W2952629437 hasConceptScore W2952629437C120665830 @default.
- W2952629437 hasConceptScore W2952629437C121332964 @default.
- W2952629437 hasConceptScore W2952629437C131221115 @default.
- W2952629437 hasConceptScore W2952629437C145148216 @default.
- W2952629437 hasConceptScore W2952629437C184779094 @default.
- W2952629437 hasConceptScore W2952629437C185544564 @default.
- W2952629437 hasConceptScore W2952629437C196597080 @default.
- W2952629437 hasConceptScore W2952629437C39984356 @default.
- W2952629437 hasConceptScore W2952629437C519659679 @default.
- W2952629437 hasConceptScore W2952629437C60799052 @default.
- W2952629437 hasConceptScore W2952629437C62520636 @default.
- W2952629437 hasConceptScore W2952629437C6260449 @default.
- W2952629437 hasLocation W29526294371 @default.
- W2952629437 hasOpenAccess W2952629437 @default.
- W2952629437 hasPrimaryLocation W29526294371 @default.
- W2952629437 hasRelatedWork W1973082466 @default.
- W2952629437 hasRelatedWork W1980338620 @default.
- W2952629437 hasRelatedWork W2006357951 @default.
- W2952629437 hasRelatedWork W2079744093 @default.
- W2952629437 hasRelatedWork W2089397431 @default.
- W2952629437 hasRelatedWork W2090275058 @default.
- W2952629437 hasRelatedWork W2183843776 @default.
- W2952629437 hasRelatedWork W2262425214 @default.
- W2952629437 hasRelatedWork W2276765428 @default.
- W2952629437 hasRelatedWork W2335215320 @default.
- W2952629437 hasRelatedWork W2393862620 @default.
- W2952629437 hasRelatedWork W2615570930 @default.
- W2952629437 hasRelatedWork W2765294035 @default.
- W2952629437 hasRelatedWork W2936672149 @default.
- W2952629437 hasRelatedWork W2990840467 @default.
- W2952629437 hasRelatedWork W3098113240 @default.
- W2952629437 hasRelatedWork W3098193913 @default.
- W2952629437 hasRelatedWork W3101463385 @default.
- W2952629437 hasRelatedWork W3144853060 @default.
- W2952629437 hasRelatedWork W2183588807 @default.
- W2952629437 isParatext "false" @default.
- W2952629437 isRetracted "false" @default.
- W2952629437 magId "2952629437" @default.
- W2952629437 workType "article" @default.