Performance of a cold-atom gravimeter with an active vibration isolator

Zhou, Min-Kang; Hu, Zhong-Kun; Duan, Xuanchu; Sun, Bu-Liang; Chen, Lele; Zhang, Qiaozhen; Luo, Jun

doi:10.1103/physreva.86.043630

Cited by 68 publications

(45 citation statements)

References 36 publications

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“…the displacement operatorD in equations (C. 25) and (C.27) is the identity implying C=1. Moreover, the interferometer phase becomes independent of the initial state y ñ | i and is given by Appendix D. The phase δf 1 for the CAB interferometer…”

Section: Appendix a Effective Hamiltonians For Two Interferometer Brmentioning

confidence: 99%

Representation-free description of atom interferometers in time-dependent linear potentials

et al. 2019

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In this article we present a new representation-free formalism, which can significantly simplify the analysis of interferometers comprised of atoms moving in time-dependent linear potentials. We present a methodology for the construction of two pairs of time-dependent functions that, once determined, lead to two conditions for the closing of the interferometer, and determine the phase and the contrast of the resultant interference. Using this new formalism, we explore the dependency of the interferometer phase on the interferometer time T for different atom interferometers. By now, it is well established that light pulse atom interferometers of the type first demonstrated by Kasevich and Chu (1991 Phys. Rev. Lett. 67, 181-4; Appl. Phys. B 54, 321-32), henceforth referred to as Mach-Zehnder (MZ) atom interferometers, have a phase scaling as T 2 . A few years ago, McDonald et al (2014 Europhys. Lett. 105, 63001) have experimentally demonstrated a novel type of atom interferometer, referred to as the continuous-acceleration bloch (CAB) interferometer, where the phase reveals a mixed scaling which is governed by a combination of T 2 and T 3 . Moreover, we have recently proposed a different type of atom interferometer (Zimmermann et al 2017 Appl . Phys. B 123, 102), referred to as the T 3 -interferometer, which has a pure T 3 scaling, as demonstrated theoretically. Finally, we conclude that the CAB interferometer can be shown to be a hybrid of the standard MZ interferometer and the T 3 -interferometer. Enhancing the sensitivity of atom interferometersBecause of their extreme interferometric sensitivity, atom interferometers have been used to precisely measure physical quantities such as the polarizability of alkali atoms [6-9], the 'magic wavelength' for potassium, rubidium and calcium [10-12], Planck's constant to the cesium mass ratio h/m Cs [13], the fine structure OPEN ACCESS RECEIVED

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Section: Appendix a Effective Hamiltonians For Two Interferometer Brmentioning

confidence: 99%

Representation-free description of atom interferometers in time-dependent linear potentials

et al. 2019

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“…Atom interferometers (AI) with cold atoms and well-controlled laser pulses, such as Mach-Zehnder [3] and Ramsey-Bordé [4] AI, have been realized and demonstrated to be powerful tools for inertial sensors and precision measurements [5][6][7][8][9][10]. These two types of interferometers are typical examples of two-wave AI.…”

Section: Introductionmentioning

confidence: 99%

Atomic multiwave interferometer in an optical lattice

et al. 2013

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A multiwave atom interferometer using multiple Wannier-Stark states is experimentally realized in a vertical optical lattice. Atoms are coherently driven by stimulated Raman transitions into a superposition of several adjacent lattice sites, in which they evolve at multiples of Bloch frequency in the same internal state to form an interference pattern. We observe coherent evolution for more than 500 Bloch periods. The noise analysis shows that the phase resolution of this interferometer is detection noise limited. This multiwave interferometer could be a potential instrument for gravimetry and short-range forces measurement.

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“…1,2 Active vibration isolation in the vertical direction is widely used in both optical and atomic interferometry absolute gravimeters to improve sensitivity. [3][4][5][6][7][8][9][10] For absolute gravity measurements, people mostly care about the vibration noise from the vertical direction. Thus, there are no feedback controls for the isolator in the horizontal direction inside those gravimeters.…”

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confidence: 99%

Note: A three-dimension active vibration isolator for precision atom gravimeters

Zhou

Xiong

Chen

et al. 2015

Review of Scientific Instruments

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An ultra-low frequency active vibration isolator, simultaneously suppressing three-dimensional vibration noise, is demonstrated experimentally. The equivalent natural period of the isolator is 100 s and 12 s for the vertical and horizontal direction, respectively. The vibration noise in the vertical direction is about 50 times reduced during 0.2 and 2 Hz, and 5 times reduced in the other two orthogonal directions in the same frequency range. This isolator is designed for atom gravimeters, especially suitable for the gravimeter whose sensitivity is limited by vibration couplings.

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Performance of a cold-atom gravimeter with an active vibration isolator

Cited by 68 publications

References 36 publications

Representation-free description of atom interferometers in time-dependent linear potentials

Representation-free description of atom interferometers in time-dependent linear potentials

Atomic multiwave interferometer in an optical lattice

Note: A three-dimension active vibration isolator for precision atom gravimeters

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