Improved limits on variation of the fine structure constant and violation of Local Position Invariance

T. M. Fortier, N. Ashby, J. C. Bergquist, M. J. Delaney, S. A. Diddams, T. P. Heavner, L. Hollberg, W. M. Itano, S. R. Jefferts, K. Kim, W. H. Oskay, T. E. Parker, J. Shirley, J. E. Stalnaker, F. Levi, L. Lorini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report tests of Local Position Invariance (LPI) and constancy 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. Analysis of the frequency ratio, extending over six years at NIST, is used to place a limit on the fractional variation of the two clocks of less than 5.8 × 10-6 per change in normalized solar gravitational potential, and a limit on fractional variation of the fine structure constant at < 1.3 × 10-165 yr -1, assuming invariance of other fundamental constants. Comparison of our results with those previously reported for the absolute optical frequency measurements of 171Yb+ versus other 133Cs standard yields a coupled constraint of -0.04 × 10-15 < ᾱ/α < 0.46 × 10-15 yr-1 and -2.39 × 10-15 < ᾱ/α < 0.47 × l0-15 yr-1.

Original languageEnglish
Title of host publication2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS
Pages663-665
Number of pages3
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS - Geneva, Switzerland
Duration: 2007 May 292007 Jun 1

Publication series

NameProceedings of the IEEE International Frequency Control Symposium and Exposition

Other

Other2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS
CountrySwitzerland
CityGeneva
Period07/5/2907/6/1

Fingerprint

Invariance
Clocks
Electron transitions
Ground state

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Fortier, T. M., Ashby, N., Bergquist, J. C., Delaney, M. J., Diddams, S. A., Heavner, T. P., ... Lorini, L. (2007). Improved limits on variation of the fine structure constant and violation of Local Position Invariance. In 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS (pp. 663-665). [4319157] (Proceedings of the IEEE International Frequency Control Symposium and Exposition). https://doi.org/10.1109/FREQ.2007.4319157
Fortier, T. M. ; Ashby, N. ; Bergquist, J. C. ; Delaney, M. J. ; Diddams, S. A. ; Heavner, T. P. ; Hollberg, L. ; Itano, W. M. ; Jefferts, S. R. ; Kim, K. ; Oskay, W. H. ; Parker, T. E. ; Shirley, J. ; Stalnaker, J. E. ; Levi, F. ; Lorini, L. / Improved limits on variation of the fine structure constant and violation of Local Position Invariance. 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS. 2007. pp. 663-665 (Proceedings of the IEEE International Frequency Control Symposium and Exposition).
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abstract = "We report tests of Local Position Invariance (LPI) and constancy 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. Analysis of the frequency ratio, extending over six years at NIST, is used to place a limit on the fractional variation of the two clocks of less than 5.8 × 10-6 per change in normalized solar gravitational potential, and a limit on fractional variation of the fine structure constant at < 1.3 × 10-165 yr -1, assuming invariance of other fundamental constants. Comparison of our results with those previously reported for the absolute optical frequency measurements of 171Yb+ versus other 133Cs standard yields a coupled constraint of -0.04 × 10-15 < ᾱ/α < 0.46 × 10-15 yr-1 and -2.39 × 10-15 < ᾱ/α < 0.47 × l0-15 yr-1.",
author = "Fortier, {T. M.} and N. Ashby and Bergquist, {J. C.} and Delaney, {M. J.} and Diddams, {S. A.} and Heavner, {T. P.} and L. Hollberg and Itano, {W. M.} and Jefferts, {S. R.} and K. Kim and Oskay, {W. H.} and Parker, {T. E.} and J. Shirley and Stalnaker, {J. E.} and F. Levi and L. Lorini",
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Fortier, TM, Ashby, N, Bergquist, JC, Delaney, MJ, Diddams, SA, Heavner, TP, Hollberg, L, Itano, WM, Jefferts, SR, Kim, K, Oskay, WH, Parker, TE, Shirley, J, Stalnaker, JE, Levi, F & Lorini, L 2007, Improved limits on variation of the fine structure constant and violation of Local Position Invariance. in 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS., 4319157, Proceedings of the IEEE International Frequency Control Symposium and Exposition, pp. 663-665, 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS, Geneva, Switzerland, 07/5/29. https://doi.org/10.1109/FREQ.2007.4319157

Improved limits on variation of the fine structure constant and violation of Local Position Invariance. / Fortier, T. M.; Ashby, N.; Bergquist, J. C.; Delaney, M. J.; Diddams, S. A.; Heavner, T. P.; Hollberg, L.; Itano, W. M.; Jefferts, S. R.; Kim, K.; Oskay, W. H.; Parker, T. E.; Shirley, J.; Stalnaker, J. E.; Levi, F.; Lorini, L.

2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS. 2007. p. 663-665 4319157 (Proceedings of the IEEE International Frequency Control Symposium and Exposition).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Improved limits on variation of the fine structure constant and violation of Local Position Invariance

AU - Fortier, T. M.

AU - Ashby, N.

AU - Bergquist, J. C.

AU - Delaney, M. J.

AU - Diddams, S. A.

AU - Heavner, T. P.

AU - Hollberg, L.

AU - Itano, W. M.

AU - Jefferts, S. R.

AU - Kim, K.

AU - Oskay, W. H.

AU - Parker, T. E.

AU - Shirley, J.

AU - Stalnaker, J. E.

AU - Levi, F.

AU - Lorini, L.

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AB - We report tests of Local Position Invariance (LPI) and constancy 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. Analysis of the frequency ratio, extending over six years at NIST, is used to place a limit on the fractional variation of the two clocks of less than 5.8 × 10-6 per change in normalized solar gravitational potential, and a limit on fractional variation of the fine structure constant at < 1.3 × 10-165 yr -1, assuming invariance of other fundamental constants. Comparison of our results with those previously reported for the absolute optical frequency measurements of 171Yb+ versus other 133Cs standard yields a coupled constraint of -0.04 × 10-15 < ᾱ/α < 0.46 × 10-15 yr-1 and -2.39 × 10-15 < ᾱ/α < 0.47 × l0-15 yr-1.

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Fortier TM, Ashby N, Bergquist JC, Delaney MJ, Diddams SA, Heavner TP et al. Improved limits on variation of the fine structure constant and violation of Local Position Invariance. In 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS. 2007. p. 663-665. 4319157. (Proceedings of the IEEE International Frequency Control Symposium and Exposition). https://doi.org/10.1109/FREQ.2007.4319157