Alpha-dot or not: Comparison of two single atom optical clocks

T. Rosenband; D.B. Hume; C.W. Chou; J. C J Koelemeij; A. Brusch; S. Bickman; W. H. Oskay; T. M. Fortier; J. E. Stalnaker; S. A. Diddams; R. Newbury-Ecob; W. C. Swann; W. M. Itano; D.J. Wineland; J. C. Bergquist

Alpha-dot or not: Comparison of two single atom optical clocks

T. Rosenband, D.B. Hume, C.W. Chou, J. C J Koelemeij, A. Brusch, S. Bickman, W. H. Oskay, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, R. Newbury-Ecob, W. C. Swann, W. M. Itano, D.J. Wineland, J. C. Bergquist

Research output: Chapter in Book / Report / Conference proceeding › Conference contribution › Academic › peer-review

Abstract

Repeated measurements of the frequency ratio of ¹⁹⁹Hg ⁺ and ²⁷A1⁺ singleatom optical clocks over the course of a year yield a constraint on the possible present-era temporal variation of the fine-structure constant a. The time variation of the measured ratio corresponds to a time variation in the fine structure constant of ά/α = (-1.6 ± 2.3) × 10^-17/year, consistent with no change. The frequency ratio of these clocks was measured with a fractional uncertainty of 5.2 × 10^-17. Stability simulations for optical clocks whose probe period is limited by 1/f-noise in the laser local oscillator provide an estimate of the optimal probe period, as well as a modified expression for the theoretical clock stability.

Original language	English
Title of host publication	Proceedings of the 7th Symposium on Frequency Standards and Metrology, ISFSM 2008
Pages	20-33
Number of pages	14
Publication status	Published - 2009
Event	7th Symposium on Frequency Standards and Metrology, ISFSM 2008 - Pacific Grove, CA, United States Duration: 5 Oct 2008 → 11 Oct 2008

Conference

Conference	7th Symposium on Frequency Standards and Metrology, ISFSM 2008
Country/Territory	United States
City	Pacific Grove, CA
Period	5/10/08 → 11/10/08

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Rosenband, T., Hume, D. B., Chou, C. W., Koelemeij, J. C. J., Brusch, A., Bickman, S., Oskay, W. H., Fortier, T. M., Stalnaker, J. E., Diddams, S. A., Newbury-Ecob, R., Swann, W. C., Itano, W. M., Wineland, D. J., & Bergquist, J. C. (2009). Alpha-dot or not: Comparison of two single atom optical clocks. In Proceedings of the 7th Symposium on Frequency Standards and Metrology, ISFSM 2008 (pp. 20-33)

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title = "Alpha-dot or not: Comparison of two single atom optical clocks",

abstract = "Repeated measurements of the frequency ratio of 199Hg + and 27A1+ singleatom optical clocks over the course of a year yield a constraint on the possible present-era temporal variation of the fine-structure constant a. The time variation of the measured ratio corresponds to a time variation in the fine structure constant of ά/α = (-1.6 ± 2.3) × 10-17/year, consistent with no change. The frequency ratio of these clocks was measured with a fractional uncertainty of 5.2 × 10-17. Stability simulations for optical clocks whose probe period is limited by 1/f-noise in the laser local oscillator provide an estimate of the optimal probe period, as well as a modified expression for the theoretical clock stability.",

author = "T. Rosenband and D.B. Hume and C.W. Chou and Koelemeij, \{J. C J\} and A. Brusch and S. Bickman and Oskay, \{W. H.\} and Fortier, \{T. M.\} and Stalnaker, \{J. E.\} and Diddams, \{S. A.\} and R. Newbury-Ecob and Swann, \{W. C.\} and Itano, \{W. M.\} and D.J. Wineland and Bergquist, \{J. C.\}",

year = "2009",

language = "English",

isbn = "981283821X",

pages = "20--33",

booktitle = "Proceedings of the 7th Symposium on Frequency Standards and Metrology, ISFSM 2008",

note = "7th Symposium on Frequency Standards and Metrology, ISFSM 2008 ; Conference date: 05-10-2008 Through 11-10-2008",

}

Rosenband, T, Hume, DB, Chou, CW, Koelemeij, JCJ, Brusch, A, Bickman, S, Oskay, WH, Fortier, TM, Stalnaker, JE, Diddams, SA, Newbury-Ecob, R, Swann, WC, Itano, WM, Wineland, DJ & Bergquist, JC 2009, Alpha-dot or not: Comparison of two single atom optical clocks. in Proceedings of the 7th Symposium on Frequency Standards and Metrology, ISFSM 2008. pp. 20-33, 7th Symposium on Frequency Standards and Metrology, ISFSM 2008, Pacific Grove, CA, United States, 5/10/08.

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T2 - 7th Symposium on Frequency Standards and Metrology, ISFSM 2008

AU - Rosenband, T.

AU - Hume, D.B.

AU - Chou, C.W.

AU - Koelemeij, J. C J

AU - Brusch, A.

AU - Bickman, S.

AU - Oskay, W. H.

AU - Fortier, T. M.

AU - Stalnaker, J. E.

AU - Diddams, S. A.

AU - Newbury-Ecob, R.

AU - Swann, W. C.

AU - Itano, W. M.

AU - Wineland, D.J.

AU - Bergquist, J. C.

PY - 2009

Y1 - 2009

N2 - Repeated measurements of the frequency ratio of 199Hg + and 27A1+ singleatom optical clocks over the course of a year yield a constraint on the possible present-era temporal variation of the fine-structure constant a. The time variation of the measured ratio corresponds to a time variation in the fine structure constant of ά/α = (-1.6 ± 2.3) × 10-17/year, consistent with no change. The frequency ratio of these clocks was measured with a fractional uncertainty of 5.2 × 10-17. Stability simulations for optical clocks whose probe period is limited by 1/f-noise in the laser local oscillator provide an estimate of the optimal probe period, as well as a modified expression for the theoretical clock stability.

AB - Repeated measurements of the frequency ratio of 199Hg + and 27A1+ singleatom optical clocks over the course of a year yield a constraint on the possible present-era temporal variation of the fine-structure constant a. The time variation of the measured ratio corresponds to a time variation in the fine structure constant of ά/α = (-1.6 ± 2.3) × 10-17/year, consistent with no change. The frequency ratio of these clocks was measured with a fractional uncertainty of 5.2 × 10-17. Stability simulations for optical clocks whose probe period is limited by 1/f-noise in the laser local oscillator provide an estimate of the optimal probe period, as well as a modified expression for the theoretical clock stability.

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M3 - Conference contribution

AN - SCOPUS:84892927562

SN - 981283821X

SN - 9789812838216

SP - 20

EP - 33

BT - Proceedings of the 7th Symposium on Frequency Standards and Metrology, ISFSM 2008

Y2 - 5 October 2008 through 11 October 2008

ER -

Alpha-dot or not: Comparison of two single atom optical clocks

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