ac Stark shift in double resonance and coherent population trapping in a wall-coated cell for compact Rb atomic clocks

Miletic, D.; Bandi, Thejesh; Affolderbach, C.; Mileti, G.

doi:10.1088/0031-8949/2012/t149/014012

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…It is also important to note that in many previous experiments attempting to measure the light shift, hyperfine or spin-polarization was created through optical pumping [ 29]. This presents a problem for precision tests, since the optical pumping light and the ac-Stark shift perturbing field have routinely been the same [16,17], making it difficult to isolate the fundamental ac-Stark shift from systematic optical pumping effects (e.g., the inhomogeneous light shift [21]). We therefore employ two lasers in our experiments.…”

Section: Methodsmentioning

confidence: 99%

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Precision test of the ac Stark shift in a rubidium atomic vapor

et al. 2016

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The ac-Stark shift (also known as the "light shift") is one of the most important physical processes that arises in precision spectroscopy, affecting the basic understanding of field/matter interactions, measurements of fundamental constants, and even the atomic clocks onboard GPS satellites. Though the theory of the ac-Stark shift was fully developed by the 1960s/70s, precision tests of theory have, for the most part, been few. Taking advantage of recent developments in atomic clock technology, specifically the pulsed approach to atomic signal generation, which allows frequency measurements with a resolution of 10 -15 , we demonstrate a new methodology for measuring the ac-Stark shift. Here, we report results from a precision examination of the ac-Stark shift in a vapor phase system, examining the resonant frequency of the 87 Rb 0-0 hyperfine transition for a perturbing laser tuned over a broad optical frequency range (18 GHz) around the D 1 absorption resonance. Over the full frequency range the agreement between semiclassical theory and experiment is very good (better than 5×10 -2 ), and in our experiments we test both the frequency dependence of the scalar and, for the first time, tensor components of the light shift.

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Section: Methodsmentioning

confidence: 99%

“…However, only partial and limited tests have been made on the full optical frequency dependence of the ac-Stark shift near resonance, where photon scattering is strongest and dephasing processes cannot be ignored [15,16].…”

Section: Introductionmentioning

confidence: 99%

Precision test of the ac Stark shift in a rubidium atomic vapor

et al. 2016

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“…The α-LS coefficient being laser frequency dependant, another coefficient has to be considered. Locally, the clock sensitivity to the laser frequency, ∂ν clock ∂ν laser , is called β light shift [19], or β-LS coefficient. Since this coefficient scales linearly with the laser intensity (see (1)), a smaller intensity will therefore minimize its influence on the clock frequency.…”

Section: Light-shift Studiesmentioning

confidence: 99%

Double resonance spectroscopic studies using a new generation of microfabricated microwave cavity

Pellaton

Affolderbach

Mileti

et al. 2013

2013 Joint European Frequency and Time Forum &Amp; International Frequency Control Symposium (EFTF/IFC)

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We evaluate the potential of a new generation microwave cavity by double resonance spectroscopic studies. Both, the cell and the microwave cavity are microfabricated. This allows a substantial size reduction for the physics package, without compromising the RF field geometry and the optical quality of the cell windows. We demonstrate short term stability of 5 × 10 −12 τ −1/2 (1-100 s), and below 1 × 10 −12 up to 10 3 s. Finally, we report on the AC stark shift effect, one of the main limiting factors for long term clock stabilities.

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“…A key idea is 'frequency compensation' which aims to counterbalance frequency shifts due to ΔX with an additional opposive shift. For rubidium atomic clocks, a mixed-buffer-gas approach reduces the vapor-cell temperaturedependent frequency shift coefficient by employing two buffer gases (e.g., N2 and CH4), each of which creats opposite temperature shifts relative to the Rb transition [20,[24][25]. For 2hν-ROFS, a two-color light approach has been developed to mitigate light shift by using two different light colors with opposing shift polarities [26].…”

Section: Introductionmentioning

confidence: 99%

Life Science: Innovation and prosperity—commemorating the 60th anniversary of the Chinese Academy of Sciences

2010

Sci. China Life Sci.

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Globally accurate full-dimensional ground state potential energy surface (PES) for the Cl( 2 P) + HCl → HCl + Cl( 2 P) reaction, a prototypical heavy-light-heavy abstract reaction, is developed using permutation invariant polynomial neural network (PIP-NN) method and embedded atom neural network (EANN) method, with the corresponding total root mean square error (RMSE) being only 0.043 and 0.056 kcal/mol, respectively.The saddle point of this reaction system is found to be nonlinear. A full-dimensional approximate quantum mechanical method, ring-polymer molecular dynamics (RPMD) with Cayley propagator, is employed to calculate the thermal rate coefficients and kinetic isotopic effects of title reactions Cl( 2 P) + XCl→ XCl + Cl( 2 P) (H, D, Mu) on both new PESs. The results reproduce the experimental results at high temperatures perfectly, but with moderate accuracy at lower temperatures. The similar kinetic behavior is supported by quantum dynamics using wave packet calculations as well.

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ac Stark shift in double resonance and coherent population trapping in a wall-coated cell for compact Rb atomic clocks

Cited by 5 publications

References 8 publications

Precision test of the ac Stark shift in a rubidium atomic vapor

Precision test of the ac Stark shift in a rubidium atomic vapor

Double resonance spectroscopic studies using a new generation of microfabricated microwave cavity

Life Science: Innovation and prosperity—commemorating the 60th anniversary of the Chinese Academy of Sciences

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