Detection of applied and ambient forces with a matter-wave magnetic gradiometer

Robertson, Billy I.; MacKellar, Andrew R.; Halket, James; Gribbon, Anna; Pritchard, Jonathan D.; Arnold, Aidan S.; Riis, Erling; Griffin, Paul F.

doi:10.1103/physreva.96.053622

Cited by 2 publications

(2 citation statements)

References 33 publications

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“…with a term F 0 that accounts for additional phase shifts introduced during the initialization process, by noise such as lattice vibrations [15], or by interactions (see section 4.2). The pulse sequence used in this experiment is based on previous work [20,30,31]. Our splitting and recombination pulses consist of three sub-pulses of lattice beam L1 with durations 60, 110 and 60 μs, and lattice intensities of 6.6 E r , 0.2 E r , and 6.6 E r .…”

Section: Interferometer Schemementioning

confidence: 99%

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Interferometric measurement of micro-g acceleration with levitated atoms

et al. 2019

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The sensitivity of atom interferometers is usually limited by the observation time of a free falling cloud of atoms in Earth's gravitational field. Considerable efforts are currently made to increase this observation time, e.g. in fountain experiments, drop towers and in space. In this article, we experimentally study and discuss the use of magnetic levitation for interferometric precision measurements. We employ a Bose-Einstein condensate of cesium atoms with tuneable interaction and a Michelson interferometer scheme for the detection of micro-g acceleration. In addition, we demonstrate observation times of 1s, which are comparable to current drop-tower experiments, we study the curvature of our force field, and we observe the effects of a phase-shifting element in the interferometer paths.

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Section: Interferometer Schemementioning

confidence: 99%

“…The pulse sequence used in this experiment is based on previous work [20,30,31]. Our splitting and recombination pulses consist of three sub-pulses of lattice beam L1 with durations 60 µs, 110 µs, and 60 µs, and lattice intensities of 6.6 E r , 0.2 E r , and 6.6 E r .…”

Section: Interferometer Schemementioning

confidence: 99%

Interferometric measurement of micro-g acceleration with levitated atoms

et al. 2019

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High precision calibration of optical lattice depth based on multiple pulses Kapitza-Dirac diffraction

Zhou¹,

Yang²,

Zhai³

et al. 2018

Opt. Express

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The precise calibration of optical lattice depth is an important step in the experiments of ultracold atoms in optical lattices. The Raman-Nath diffraction method, as the most commonly used method of calibrating optical lattice depth, has a limited range of validity and the calibration accuracy is not high enough. Based on multiple pulses Kapitza-Dirac diffraction, we propose and demonstrate a new calibration method by measuring the fully transfer fidelity of the first diffraction order. The high sensitivity of the transfer fidelity to the lattice depth ensures the highly precision calibration of the optical lattice depth. For each lattice depth measured, the calibration uncertainty is further reduced to less than 0.6% by applying the Back-Propagation Neural Network Algorithm. The accuracy of this method is almost one order of magnitude higher than that of the Raman-Nath diffraction method, and it has a wide range of validity applicable to both shallow lattices and deep lattices.

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Detection of applied and ambient forces with a matter-wave magnetic gradiometer

Cited by 2 publications

References 33 publications

Interferometric measurement of micro-g acceleration with levitated atoms

Interferometric measurement of micro-g acceleration with levitated atoms

High precision calibration of optical lattice depth based on multiple pulses Kapitza-Dirac diffraction

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