Improved Measurement of the Hydrogen $1S--2S$ Transition Frequency

Christian G. Parthey; Arthur Matveev; Janis Alnis; Birgitta Bernhardt; Axel Beyer; Ronald Holzwarth; Aliaksei Maistrou; Randolf Pohl; Katharina Predehl; Thomas Udem; Tobias Wilken; Nikolai Kolachevsky; Michel Abgrall; Daniele Rovera; Christophe Salomon; Philippe Laurent; Theodor W. Hänsch

doi:10.1103/PhysRevLett.107.203001

Improved Measurement of the Hydrogen $1S--2S$ Transition Frequency

Christian G. Parthey, Arthur Matveev, Janis Alnis, Birgitta Bernhardt, Axel Beyer, Ronald Holzwarth, Aliaksei Maistrou, Randolf Pohl, Katharina Predehl, Thomas Udem, Tobias Wilken, Nikolai Kolachevsky, Michel Abgrall, Daniele Rovera, Christophe Salomon, Philippe Laurent, Theodor W. Hänsch

Research output: Contribution to journal › Article › peer-review

Abstract

We have measured the 1S–2S transition frequency in atomic hydrogen via two-photon spectroscopy on a 5.8 K atomic beam. We obtain f1S–2S=2 466 061 413 187 035 (10) Hz for the hyperfine centroid, in agreement with, but 3.3 times better than the previous result [M. Fischer et al., Phys. Rev. Lett. 92, 230802 (2004)]. The improvement to a fractional frequency uncertainty of 4.2×10−15 arises mainly from an improved stability of the spectroscopy laser, and a better determination of the main systematic uncertainties, namely, the second order Doppler and ac and dc Stark shifts. The probe laser frequency was phase coherently linked to the mobile cesium fountain clock FOM via a frequency comb.

Original language	English
Pages (from-to)	203001
Number of pages	5
Journal	Physical Review Letters
Volume	107
DOIs	https://doi.org/10.1103/PhysRevLett.107.203001
Publication status	Published - 1 Nov 2011
Externally published	Yes

Fields of Expertise

Advanced Materials Science

Access to Document

10.1103/PhysRevLett.107.203001

https://link.aps.org/doi/10.1103/PhysRevLett.107.203001

Cite this

Parthey, C. G., Matveev, A., Alnis, J., Bernhardt, B., Beyer, A., Holzwarth, R., Maistrou, A., Pohl, R., Predehl, K., Udem, T., Wilken, T., Kolachevsky, N., Abgrall, M., Rovera, D., Salomon, C., Laurent, P., & Hänsch, T. W. (2011). Improved Measurement of the Hydrogen $1S--2S$ Transition Frequency. Physical Review Letters, 107, 203001. https://doi.org/10.1103/PhysRevLett.107.203001

Parthey, CG, Matveev, A, Alnis, J, Bernhardt, B, Beyer, A, Holzwarth, R, Maistrou, A, Pohl, R, Predehl, K, Udem, T, Wilken, T, Kolachevsky, N, Abgrall, M, Rovera, D, Salomon, C, Laurent, P & Hänsch, TW 2011, 'Improved Measurement of the Hydrogen $1S--2S$ Transition Frequency', Physical Review Letters, vol. 107, pp. 203001. https://doi.org/10.1103/PhysRevLett.107.203001

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abstract = "We have measured the 1S–2S transition frequency in atomic hydrogen via two-photon spectroscopy on a 5.8 K atomic beam. We obtain f1S–2S=2 466 061 413 187 035 (10) Hz for the hyperfine centroid, in agreement with, but 3.3 times better than the previous result [M. Fischer et al., Phys. Rev. Lett. 92, 230802 (2004)]. The improvement to a fractional frequency uncertainty of 4.2×10−15 arises mainly from an improved stability of the spectroscopy laser, and a better determination of the main systematic uncertainties, namely, the second order Doppler and ac and dc Stark shifts. The probe laser frequency was phase coherently linked to the mobile cesium fountain clock FOM via a frequency comb.",

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doi = "10.1103/PhysRevLett.107.203001",

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AU - Parthey, Christian G.

AU - Matveev, Arthur

AU - Alnis, Janis

AU - Bernhardt, Birgitta

AU - Beyer, Axel

AU - Holzwarth, Ronald

AU - Maistrou, Aliaksei

AU - Pohl, Randolf

AU - Predehl, Katharina

AU - Udem, Thomas

AU - Wilken, Tobias

AU - Kolachevsky, Nikolai

AU - Abgrall, Michel

AU - Rovera, Daniele

AU - Salomon, Christophe

AU - Laurent, Philippe

AU - Hänsch, Theodor W.

PY - 2011/11/1

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N2 - We have measured the 1S–2S transition frequency in atomic hydrogen via two-photon spectroscopy on a 5.8 K atomic beam. We obtain f1S–2S=2 466 061 413 187 035 (10) Hz for the hyperfine centroid, in agreement with, but 3.3 times better than the previous result [M. Fischer et al., Phys. Rev. Lett. 92, 230802 (2004)]. The improvement to a fractional frequency uncertainty of 4.2×10−15 arises mainly from an improved stability of the spectroscopy laser, and a better determination of the main systematic uncertainties, namely, the second order Doppler and ac and dc Stark shifts. The probe laser frequency was phase coherently linked to the mobile cesium fountain clock FOM via a frequency comb.

AB - We have measured the 1S–2S transition frequency in atomic hydrogen via two-photon spectroscopy on a 5.8 K atomic beam. We obtain f1S–2S=2 466 061 413 187 035 (10) Hz for the hyperfine centroid, in agreement with, but 3.3 times better than the previous result [M. Fischer et al., Phys. Rev. Lett. 92, 230802 (2004)]. The improvement to a fractional frequency uncertainty of 4.2×10−15 arises mainly from an improved stability of the spectroscopy laser, and a better determination of the main systematic uncertainties, namely, the second order Doppler and ac and dc Stark shifts. The probe laser frequency was phase coherently linked to the mobile cesium fountain clock FOM via a frequency comb.

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DO - 10.1103/PhysRevLett.107.203001

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