High-resolution spectroscopy of the 1<i>S</i>-2<i>S</i>transition of atomic hydrogen and deuterium

Schmidt-Kaler, F.; Leibfried, D.; Seel, S.; Zimmermann, C.; König, W.; Weitz, Martin; Hänsch, Theodor W.

doi:10.1103/physreva.51.2789

Cited by 70 publications

(98 citation statements)

References 33 publications

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“…If coma may be neglected and the secondary waist ellipticity is unimportant, then both f and / cos a will be free parameters, and we may instead choose the con®guration in which the mode size is least sensitive to mirror position, which for small F may be considered to occur when the tangential and sagittal beam waists are simultaneous maxima as functions of the concave mirror separation [18]. The calculation of this con®guration is described in Appendix C.…”

Section: Mirror Curvature and Incidence Anglementioning

confidence: 99%

See 1 more Smart Citation

On the design of enhancement cavities for second harmonic generation

Freegarde¹,

Zimmermann²

2001

Optics Communications

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Section: Mirror Curvature and Incidence Anglementioning

confidence: 99%

“…4 that the beam waist may be adjusted, by varying u, up to a maximum value determined by v [26]. At these maxima, the mode size is least sensitive to mirror position and, for some researchers, simultaneous maxima of both tangential and sagittal mode sizes therefore provide the preferred con®guration [18].…”

Section: Appendix a Ray-transfer Matricesmentioning

confidence: 99%

On the design of enhancement cavities for second harmonic generation

Freegarde¹,

Zimmermann²

2001

Optics Communications

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“…Nonetheless, even a measurement at an accuracy of 10-13, the level at which the difficulties mentioned seem manageable in the first traps [12], would give a substantially improved CPT test involving leptons and baryons. The most precise laser spectroscopy of hydrogen attained so far was obtained with a cold hydrogen beam by one group in our ATRAP collaboration [13]. The narrowest observed width is still much wider than the natural linewidth, but we expect that steady and substantial improvements in accuracy will continue as they have been for many years.…”

Section: Seeking More Stringent Cpt Testsmentioning

confidence: 99%

Cold antimatter plasmas, and aspirations for cold antihydrogen

Gabrielse¹,

Tan²,

Bowden³

et al. 2002

AIP Conference Proceedings

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Abstract. Only our ATRAP Collaboration is yet able to accumulate and store 4.2 K antiprotons and positrons. The antiprotons come initially from the new Antiproton Decelerator facility at CERN. Good control of such cold antimatter plasmas is key to aspirations to produce and study antihydrogen atoms that are cold enough to confine by their magnetic moments. In the closest approach to cold antihydrogen realized to date, the cold positrons have been used to cool antiprotons, the first time that positron cooling has ever been observed. The Penning-Joffe trap, one possibility for simultaneously confining antihydrogen and the cold ingredients from which it is formed, is introduced and discussed.

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“…In this Letter we report for the first time on atom interferometric high resolution measurements of an optical transition with a line Q factor above 10 12 corresponding to a resolved linewidth well below 1 kHz. The results presented here should be compared to recent results from the methods of the two-photon spectroscopy [9] and spectroscopy on single trapped ions [10]. In two-photon spectroscopy the ac Stark shift affects the obtainable accuracy, whereas in single-ion spectroscopy the stability is limited by the small particle numbers.…”

Section: Institut F üR Quantenoptik Der Universität Hannover Welfengmentioning

confidence: 99%

Sub-Kilohertz Optical Spectroscopy with a Time Domain Atom Interferometer

et al. 1998

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We report on the sub-kilohertz optical spectroscopy on the 1 S 0 -3 P 1 intercombination transition in magnesium at 457 nm. The spectroscopic signal is probed by a time domain atom interferometer. The realization of this time domain atom interferometer with laser cooled and trapped atoms allows extremely long interaction times and leads to resolutions down to 491 Hz (FWHM). This corresponds to a high line Q factor of 1.3 3 10 12 . Because of the high accuracy in the determination of the line center, applications with respect to an optical frequency standard are possible. [S0031-9007(98) PACS numbers: 03.75. Dg, 39.20. + q, 39.30. + w, In recent years the field of atom interferometry [1] has opened up new areas in fundamental and applied atomic physics. This is based mainly on the small wavelength of atomic de Broglie waves leading to the high sensitivity of atomic interferometers. In parallel the operation of atom interferometers has shown that due to the small de Broglie wavelength the proposed high sensitivity demands a setup of highest mechanical stability. Very recently several atom interferometric measurements have reached or even surpassed the precision of conventional "state of the art methods." Prominent examples are the realization of a highly sensitive atom-based Sagnac gyroscope [2], the measurement of the Earth's gravitational acceleration [3], and the precise determination ofh͞m atom [4].The Ramsey-Bordé atom interferometer, in particular, has proven to have excellent perspectives for applications in high resolution spectroscopy [1]. In this type of atom interferometer, the atomic wave is split and the partial waves are reflected and recombined by nearly resonant laser light. The phase shift between the two interfering matter waves depends strongly on the frequency of the splitting laser beam producing the spectroscopic signal. The transfer of the Ramsey-Bordé scheme from the originally proposed beam experiment [5] to a time domain interferometer [6] increases the sensitivity and reduces systematic line shifts by several orders of magnitude.Different methods for high resolution optical spectroscopy on neutral atoms as well as ions are currently being discussed and evaluated in the context of the next generation of frequency standards and atomic clocks. Especially, cold neutral atoms are also being used in the development of new microwave clocks [7,8]. In this Letter we report for the first time on atom interferometric high resolution measurements of an optical transition with a line Q factor above 10 12 corresponding to a resolved linewidth well below 1 kHz. The results presented here should be compared to recent results from the methods of the two-photon spectroscopy [9] and spectroscopy on single trapped ions [10]. In two-photon spectroscopy the ac Stark shift affects the obtainable accuracy, whereas in single-ion spectroscopy the stability is limited by the small particle numbers. The atom interferometric measurement of optical transitions discussed here offers the combination of a high accuracy...

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High-resolution spectroscopy of the 1S-2Stransition of atomic hydrogen and deuterium

Cited by 70 publications

References 33 publications

On the design of enhancement cavities for second harmonic generation

On the design of enhancement cavities for second harmonic generation

Cold antimatter plasmas, and aspirations for cold antihydrogen

Sub-Kilohertz Optical Spectroscopy with a Time Domain Atom Interferometer

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