Frequency Ratio of Al+ and Hg+ Single-Ion Optical Clocks; Metrology at the 17th Decimal Place

@article{Rosenband2008FrequencyRO,
  title={Frequency Ratio of Al+ and Hg+ Single-Ion Optical Clocks; Metrology at the 17th Decimal Place},
  author={Till Rosenband and David B. Hume and Piet O Schmidt and Chin-wen Chou and Anders Brusch and Luca Lorini and Windell H. Oskay and R. E. Drullinger and Tara M. Fortier and Jason E. Stalnaker and Scott A. Diddams and William C. Swann and Nathan R. Newbury and Wayne M. Itano and David J. Wineland and James C. Bergquist},
  journal={Science},
  year={2008},
  volume={319},
  pages={1808 - 1812}
}
Time has always had a special status in physics because of its fundamental role in specifying the regularities of nature and because of the extraordinary precision with which it can be measured. This precision enables tests of fundamental physics and cosmology, as well as practical applications such as satellite navigation. Recently, a regime of operation for atomic clocks based on optical transitions has become possible, promising even higher performance. We report the frequency ratio of two… Expand
Optical lattice clock with neutral mercury
Optical lattice clocks offer the possibility to combine accuracy in the 10−18 range together with exquisite short stability, 10−16 for a measurement time of 1 second or even better [7]. Clocks withExpand
Frequency ratio of two optical clock transitions in 171Yb+ and constraints on the time variation of fundamental constants.
TLDR
This work presents the first direct measurement of the frequency ratio of these two clock transitions, without reference to a cesium primary standard, and using the same single ion of 171Yb+. Expand
Single-ion, transportable optical atomic clocks
For the past 15 years, tremendous progress within the fields of laser stabilization, optical frequency combs and atom cooling and trapping have allowed the realization of optical atomic clocks withExpand
Trapped-ion optical atomic clocks at the quantum limits | NIST
Frequency and its inverse, time, are the most accurately measured quantities. Historically, improvements in the accuracy of clocks have enabled advances in navigation, communication, and science.Expand
Direct measurement of the frequency ratio for Hg and Yb optical lattice clocks and closure of the Hg/Yb/Sr loop.
TLDR
The first direct measurement of the frequency ratio between a mercury (199Hg) and an ytterbium (171Yb) optical lattice clock is performed to find νHg/νYb = 2.4(1.3) × 10-16, in excellent agreement with expectations. Expand
A 920-Kilometer Optical Fiber Link for Frequency Metrology at the 19th Decimal Place
Synchronize Watches Time standards based on the energy-level transitions of atoms and ions provide the most accurate and precise methods of time keeping. Measurements made in one laboratory and inExpand
Frequency ratios of Sr, Yb, and Hg based optical lattice clocks and their applications
Abstract This article describes the recent progress of optical lattice clocks with neutral strontium ( 87 Sr), ytterbium ( 171 Yb) and mercury ( 199 Hg) atoms. In particular, we present frequencyExpand
Precision spectroscopy with 40 Ca + ions in a Paul trap
This thesis reports on experiments with trapped 40Ca+ ions related to the field of precision spectroscopy and quantum information processing. For the absolute frequency measurement of the 4s S1/2 −Expand
Towards the optical second: verifying optical clocks at the SI limit
The pursuit of ever more precise measures of time and frequency motivates redefinition of the second in terms of an optical atomic transition. To ensure continuity with the current definition, basedExpand
Towards a transportable aluminium ion quantum logic optical clock.
TLDR
A transportable optical clock based on a single trapped aluminum ion, which is interrogated via quantum logic spectroscopy, is developed, employing singly charged calcium as the logic ion for sympathetic cooling, state preparation, and readout. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 59 REFERENCES
An Optical Clock Based on a Single Trapped 199Hg+ Ion
TLDR
An all-optical atomic clock referenced to the 1.064-petahertz transition of a single trapped199Hg+ ion is demonstrated and an upper limit for the fractional frequency instability of 7 × 10−15 is measured in 1 second of averaging—a value substantially better than that of the world's best microwave atomic clocks. Expand
Single-atom optical clock with high accuracy.
TLDR
A comparison between the cesium fountain standard NIST-F1, which has been evaluated with an inaccuracy of about 4 x 10 (-16), and an optical frequency standard based on an ultraviolet transition in a single, laser-cooled mercury ion for which the fractional systematic frequency uncertainty was below 7.2 x 10(-17). Expand
Optical-to-microwave frequency comparison with fractional uncertainty of 10-15
We report the technical aspects of the optical-to-microwave comparison for our recent measurements of the optical frequency of the mercury single-ion frequency standard in terms of the SI second asExpand
Precision atomic spectroscopy for improved limits on variation of the fine structure constant and local position invariance.
TLDR
Tests of local position invariance and the variation of fundamental constants from measurements of the frequency ratio of the 282-nm 199Hg+ optical clock transition to the ground state hyperfine splitting in 133Cs show results similar to those reported for the absolute optical frequency measurements in H and 171Yb+ vs other 133Cs standards. Expand
Observation of the 1S0-->3P0 clock transition in 27Al+.
We report, for the first time, laser spectroscopy of the 1S0-->3P0 clock transition in 27Al+. A single aluminum ion and a single beryllium ion are simultaneously confined in a linear Paul trap,Expand
Nobel Lecture: Defining and measuring optical frequencies
Four long-running currents in laser technology met and merged in 1999--2000. Two of these were the quest toward a stable repetitive sequence of ever-shorter optical pulses and, on the other hand, theExpand
Monoion oscillator as potential ultimate laser frequency standard
  • H. Dehmelt
  • Physics
  • IEEE Transactions on Instrumentation and Measurement
  • 1982
An individual atomic ion localized in the center of a small Paul RF quadrupole trap has potential as an ultimate laser frequency standard because the ion may be brought to `a state of complete restExpand
Laser stabilization at the millihertz level
The main task of this paper is to identify a number of physical problems that must be successfully addressed to achieve stabilized laser linewidths well below 1 Hz. After presentation of the basicExpand
Calculations of the relativistic effects in many-electron atoms and space-time variation of fundamental constants
Theories unifying gravity and other interactions suggest the possibility of spa- tial and temporal variation of physical "constants" in the Universe. Detection of high-redshift absorption systemsExpand
Laser-cooling limits and single-ion spectroscopy.
TLDR
Sideband cooling of an ion in an rf (Paul) trap is reexamined including the effects of finite laser bandwidth and the energy of the rf micromotion and the implications for high-resolution, high-accuracy spectroscopy are investigated. Expand
...
1
2
3
4
5
...