Cold atom interferometry for inertial sensing in the field

2020 ◽  
Vol 9 (5) ◽  
pp. 221-225
Author(s):  
Ravi Kumar ◽  
Ana Rakonjac
Keyword(s):  
High Precision ◽  
Cold Atoms ◽  
Cold Atom ◽  
Atom Interferometry ◽  
Precision Measurements ◽  
Inertial Sensing ◽  
Fundamental Physics ◽  
Recent Developments ◽  
Resource Exploration ◽  
Atom Interferometers

AbstractAtom interferometry is one of the most promising technologies for high precision measurements. It has the potential to revolutionise many different sectors, such as navigation and positioning, resource exploration, geophysical studies, and fundamental physics. After decades of research in the field of cold atoms, the technology has reached a stage where commercialisation of cold atom interferometers has become possible. This article describes recent developments, challenges, and prospects for quantum sensors for inertial sensing based on cold atom interferometry techniques.

Cold atom interferometers and their applications in precision measurements

2009 ◽  
Vol 4 (2) ◽  
pp. 179-189 ◽  
Author(s):  
Jin Wang ◽  
Lin Zhou ◽  
Run-bing Li ◽  
Min Liu ◽  
Ming-sheng Zhan
Keyword(s):  
Cold Atom ◽  
Precision Measurements ◽  
Atom Interferometers

scholarly journals Development of a space cold atom clock

2020 ◽  
Vol 7 (12) ◽  
pp. 1828-1836
Author(s):  
Wei Ren ◽  
Tang Li ◽  
Qiuzhi Qu ◽  
Bin Wang ◽  
Lin Li ◽  
...  
Keyword(s):  
General Relativity ◽  
Dark Matter ◽  
Cold Atoms ◽  
Cold Atom ◽  
Deep Space ◽  
Fundamental Physics ◽  
Time Frequency ◽  
Frequency Standards ◽  
Scientific Experiments ◽  
Primary Frequency

Abstract Atomic clocks with cold atoms play important roles in the field of fundamental physics as well as primary frequency standards. Operating such cold atom clocks in space paves the way for further exploration in fundamental physics, for example dark matter and general relativity. We developed a space cold atom clock (SCAC), which was launched into orbit with the Space Lab TG-2 in 2016. Before it deorbited with TG-2 in 2019, the SCAC had been working continuously for almost 3 years. During the period in orbit, many scientific experiments and engineering tests were performed. In this article, we summarize the principle, development and in-orbit results. These works provide the basis for construction of a space-borne time-frequency system in deep space.

Antihydrogen Physics at ALPHA/CERNThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.

2009 ◽  
Vol 87 (7) ◽  
pp. 791-797 ◽  
Author(s):  
C. L. Cesar ◽  
G. B. Andresen ◽  
W. Bertsche ◽  
P. D. Bowe ◽  
C. C. Bray ◽  
...  
Keyword(s):  
High Precision ◽  
Quantum Electrodynamics ◽  
Fundamental Constants ◽  
Cpt Violation ◽  
Cpt Symmetry ◽  
Trapped Atoms ◽  
Fundamental Physics ◽  
Atomic Systems ◽  
Unique System ◽  
Recent Developments

Cold antihydrogen has been produced at CERN (Amoretti et al. (Nature, 419, 456 (2002)), Gabrielse et al. (Phys. Rev. Lett. 89, 213401 (2002))), with the aim of performing a high-precision spectroscopic comparison with hydrogen as a test of the CPT symmetry. Hydrogen, a unique system used for the development of quantum mechanics and quantum electrodynamics, has been continuously used to produce high-precision tests of theories and measurements of fundamental constants and can lead to a very sensitive search for CPT violation. After the initial production of cold antihydrogen atoms by the ATHENA group, the ALPHA Collaboration ( http://alpha.web.cern.ch/ ) has set forth on an experiment to trap and perform high-resolution laser spectroscopy on the 1S-2S transition of both atoms. In this contribution, we will review the motivations, goals, techniques, and recent developments towards this fundamental physics test. We present new discussion on predicted lineshapes for the 1S-2S spectroscopy of trapped atoms in a regime not discussed before.

scholarly journals Interleaved atom interferometry for high-sensitivity inertial measurements

2018 ◽  
Vol 4 (12) ◽  
pp. eaau7948 ◽  
Author(s):  
D. Savoie ◽  
M. Altorio ◽  
B. Fang ◽  
L. A. Sidorenkov ◽  
R. Geiger ◽  
...  
Keyword(s):  
Inertial Sensors ◽  
Sampling Rate ◽  
Cold Atom ◽  
High Sensitivity ◽  
Atom Interferometry ◽  
Gravity Gradiometry ◽  
Fundamental Physics ◽  
Inertial Measurements ◽  
Dynamic Rotation ◽  
Vibration Noise

Cold-atom inertial sensors target several applications in navigation, geoscience, and tests of fundamental physics. Achieving high sampling rates and high inertial sensitivities, obtained with long interrogation times, represents a challenge for these applications. We report on the interleaved operation of a cold-atom gyroscope, where three atomic clouds are interrogated simultaneously in an atom interferometer featuring a sampling rate of 3.75 Hz and an interrogation time of 801 ms. Interleaving improves the inertial sensitivity by efficiently averaging vibration noise and allows us to perform dynamic rotation measurements in a so far unexplored range. We demonstrate a stability of 3 × 10−10 rad s−1 , which competes with the best stability levels obtained with fiber-optic gyroscopes. Our work validates interleaving as a key concept for future atom-interferometry sensors probing time-varying signals, as in on-board navigation and gravity gradiometry, searches for dark matter, or gravitational wave detection.

A TUBULAR CAPACITOR OF STABLE VALUE

1964 ◽  
Vol 42 (8) ◽  
pp. 1508-1521 ◽  
Author(s):  
M. Kanno
Keyword(s):  
Temperature Coefficient ◽  
High Precision ◽  
International Comparisons ◽  
Free Fall ◽  
Precision Measurements ◽  
Mechanical Assembly ◽  
Voltage Coefficient ◽  
Fused Quartz ◽  
Recent Developments ◽  
Very High

Very high precision measurements of capacitance have been achieved by recent developments of transformer bridge techniques. Reference capacitors for use with these bridges must be very stable with time and temperature, as well as having other superior characteristics, all of which are very difficult to achieve with the usual mechanical assembly of conductors.This new capacitor uses fused quartz or pyrex glass tubing simply as a support for deposited metallic electrodes, and results in capacitance values of 1 pF which are stable to within one part per million (p.p.m.) for at least six months. They have a temperature coefficient of less than 3 p.p.m./°C, a voltage coefficient of less than 1 p.p.m. for applied voltages from 10 volts to 100 volts, and stability of 1 p.p.m. after free-fall drops from 10-cm heights.It is anticipated that a capacitor of this style will prove to be very useful as a transportable standard of capacitance, and could be used in international comparisons of capacitance values.

scholarly journals Gravitation Astrometric Measurement Experiment (GAME)

2010 ◽  
Vol 6 (S276) ◽  
pp. 535-536
Author(s):  
Mario Gai ◽  
Alberto Vecchiato ◽  
Alessandro Sozzetti ◽  
Sebastiano Ligori ◽  
Mario G. Lattanzi
Keyword(s):  
High Precision ◽  
Precision Measurements ◽  
Complementary Information ◽  
Fundamental Physics ◽  
Precision Determination ◽  
High Elongation ◽  
Measurement Experiment ◽  
High Precision Determination ◽  
Precision Astrometry

AbstractGAME (Gravitation Astrometric Measurement Experiment) is a mission concept based on astronomical techniques for high precision measurements of interest to Fundamental Physics and cosmology, in particular the γ and β parameters of the Parameterized Post-Newtonian formulation of gravitation theories extending the General Relativity.High precision astrometry also provides the light deflection induced by the quadrupole moment of Jupiter and Saturn, and, by high precision determination of the orbits of Mercury and high elongation asteroids, the PPN parameter β.The astrometric and photometric capabilities of GAME may also provide crucial complementary information on a selected set of known exo-planets.

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