First gravity measurements using the mobile atom interferometer GAIN

Hauth, Matthias; Freier, Christian; Schkolnik, Vladimir; Senger, A.; Schmidt, Martín; Peters, A.

doi:10.1007/s00340-013-5413-6

Cited by 121 publications

(107 citation statements)

References 22 publications

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“…From the measurements with the speaker (excitation frequency w p 2 0 from 100 to 320 Hz) and the piezo (w p 2 0 from 330 to 1000 Hz) the correlation function is extracted according to equation (14). For each measurement the correlation function is calculated with a spatial discretization of D = u 90 μm and a temporal of t D =200 μs for the speaker and t D =50 μs for the piezo measurement.…”

Section: Resultsmentioning

confidence: 99%

“…Vibrational dephasing has been analyzed and decreased in several related fields of research e.g.for a continuous beam of thermal atoms in a Mach-Zehnder interferometer [13]. In precision interferometric measurements with ultracold atoms, such as for gravity [14] or inertial effects [15], the vibrations induce an arbitrary phase shift for each interfering particle pulse. Usually, the atoms have a large time of flight in the setup and therefore an elaborated active and passive vibration damping is required [16].…”

Section: Introductionmentioning

confidence: 99%

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Vibrational dephasing in matter-wave interferometers

et al. 2017

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Matter-wave interferometry is a highly sensitive tool to measure small perturbations in a quantum system. This property allows the creation of precision sensors for dephasing mechanisms such as mechanical vibrations. They are a challenge for phase measurements under perturbing conditions that cannot be perfectly decoupled from the interferometer, e.g.for mobile interferometric devices or vibrations with a broad frequency range. Here, we demonstrate a method based on second-order correlation theory in combination with Fourier analysis, to use an electron interferometer as a sensor that precisely characterizes the mechanical vibration spectrum of the interferometer. Using the high spatial and temporal single-particle resolution of a delay line detector, the data allows to reveal the original contrast and spatial periodicity of the interference pattern from 'washed-out' matter-wave interferograms that have been vibrationally disturbed in the frequency region between 100 and 1000 Hz. Other than with electromagnetic dephasing, due to excitations of higher harmonics and additional frequencies induced from the environment, the parts in the setup oscillate with frequencies that can be different to the applied ones. The developed numerical search algorithm is capable to determine those unknown oscillations and corresponding amplitudes. The technique can identify vibrational dephasing and decrease damping and shielding requirements in electron, ion, neutron, atom and molecule interferometers that generate a spatial fringe pattern on the detector plane.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vibrational dephasing in matter-wave interferometers

et al. 2017

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“…In the last few years, inertial sensors based on cold atoms and atom interferometry have become valuable tools for various fields, such as geodesy [1][2][3] and precision measurements in fundamental physics, e.g., for measuring the fine structure constant [4,5] or for testing the universality of free fall [6,7]. One way to increase the sensitivity of these devices is to extend the interrogation time for the atoms that, for time scales significantly larger than a few tenths of a second, can only be reached in very large atomic fountains [8] or in a microgravity environment, e.g., in a drop tower experiment and ultimately in space [9].…”

Section: Introductionmentioning

confidence: 99%

High-power, micro-integrated diode laser modules at 767 and 780 nm for portable quantum gas experiments

et al. 2015

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We present micro-integrated diode laser modules operating at wavelengths of 767 and 780 nm for cold quantum gas experiments on potassium and rubidium. The master-oscillator-power-amplifier concept provides both narrow linewidth emission and high optical output power. With a linewidth (10 μs) below 1 MHz and an output power of up to 3 W, these modules are specifically suited for quantum optics experiments and feature the robustness required for operation at a drop tower or on-board a sounding rocket. This technology development hence paves the way toward precision quantum optics experiments in space.

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“…However, in a perturbingly environment this often cannot be achieved efficiently in a broad frequency range. In addition, for some applications such as mobile interferometric devices * Electronic address: a.guenther@uni-tuebingen.de † Electronic address: alexander.stibor@uni-tuebingen.de [19], the perturbation sources and therefore the shielding requirements are changing between different experimental runs.…”

Section: Introductionmentioning

confidence: 99%

Multifrequency perturbations in matter-wave interferometry

et al. 2015

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High contrast matter-wave interferometry is essential in various fundamental quantum mechanical experiments as well as for technical applications. Thereby, contrast and sensitivity are typically reduced by decoherence and dephasing effects. While decoherence accounts for a general loss of quantum information in a system due to entanglement with the environment, dephasing is due to collective time-dependent external phase shifts, which can be related to temperature drifts, mechanical vibrations or electromagnetic oscillations. In contrast to decoherence, dephasing can in principle be reversed. Here, we demonstrate in experiment and theory a method for the analysis and reduction of the influence of dephasing noise and perturbations consisting of several external frequencies in an electron interferometer. This technique uses the high spatial and temporal resolution of a delay line detector to reveal and remove dephasing perturbations by second order correlation analysis. It allows matter-wave experiments under perturbingly lab conditions and can be applied in principle to electron, atom, ion, neutron and molecule interferometers.

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First gravity measurements using the mobile atom interferometer GAIN

Cited by 121 publications

References 22 publications

Vibrational dephasing in matter-wave interferometers

Vibrational dephasing in matter-wave interferometers

High-power, micro-integrated diode laser modules at 767 and 780 nm for portable quantum gas experiments

Multifrequency perturbations in matter-wave interferometry

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