Compact chip-scale guided cold atom gyrometers for inertial navigation: Enabling technologies and design study
Garrido Alzar,L Carlos +1 more
TLDR
In this paper, the authors discuss enabling technologies relevant to a set of key functional building blocks of an atom chip-based compact inertial sensor with cold guided atoms, including accurate and reproducible positioning of atoms to initiate a measurement cycle, coherent momentum transfer to the atom wave packets, suppression of propagation-induced decoherence due to potential roughness, on-chip detection, and vacuum dynamics because of its impact on sensor stability.Abstract:
This work reviews the topic of rotation sensing with compact cold atom interferometers. A representative set of compact free-falling cold atom gyroscopes is considered because, in different respects, they establish a rotation-measurement reference for cold guided-atom technologies. This review first discusses enabling technologies relevant to a set of key functional building blocks of an atom chip-based compact inertial sensor with cold guided atoms. These functionalities concern the accurate and reproducible positioning of atoms to initiate a measurement cycle, the coherent momentum transfer to the atom wave packets, the suppression of propagation-induced decoherence due to potential roughness, on-chip detection, and vacuum dynamics because of its impact on sensor stability, which is due to the measurement dead time. Based on the existing enabling technologies, the design of an atom chip gyroscope with guided atoms is formalized using a design case that treats design elements such as guiding, fabrication, scale factor, rotation-rate sensitivity, spectral response, important noise sources, and sensor stability.read more
Citations
More filters
Continuous cold atom inertial sensor with 1 nrad/s rotation stability
Remi Geiger,I. Dutta,Denis Savoie,Bess Fang,B. Venon,Carlos L. Garrido Alzar,Arnaud Landragin +6 more
TL;DR: In this paper, a cold-atom source and an atom interferometer (AI) were used to continuously capture the rotation signal of an atomic gyroscope, and the authors showed that such continuous operation improves the short-term sensitivity of AIs.
Journal ArticleDOI
High-accuracy inertial measurements with cold-atom sensors
TL;DR: The research on cold-atom interferometers gathers a large community of about 50 groups worldwide both in the academic and now in the industrial sectors as mentioned in this paper and focuses on the acceleration of the research effort in the last 10 years.
Bose-Einstein Condensation in Microgravity
TL;DR: In this article, a Bose-Einstein condensate (BEC) of rubidium atoms is dropped into a drop tower and monitored under microgravity conditions, and the authors provide a proof-of-principle demonstration of a technique that can probe the boundary of quantum mechanics and general relativity and perhaps offer the opportunity to reconcile the two experimentally.
Journal ArticleDOI
Improving cold-atom sensors with quantum entanglement: Prospects and challenges
TL;DR: Can entanglement usefully improve cold-atom sensors, in the sense that it gives new sensing capabilities unachievable with current state-of-the-art devices?
References
More filters
Journal ArticleDOI
Quantum Mechanical Noise in an Interferometer
TL;DR: In this article, the authors proposed a new technique, the squeezed-state technique, that allows one to decrease the photon-counting error while increasing the radiation pressure error, or vice versa.
Journal ArticleDOI
Gravity Probe B: final results of a space experiment to test general relativity.
C. W. F. Everitt,D.B. DeBra,Bradford W. Parkinson,J. P. Turneaure,John Conklin,M. I. Heifetz,G. M. Keiser,Alexander S. Silbergleit,Thomas J. Holmes,J. Kolodziejczak,M Al-Meshari,John Mester,Barry Muhlfelder,V G Solomonik,K. Stahl,P W Worden,William J. Bencze,Saps Buchman,B. Clarke,A. Aljadaan,H Al-Jibreen,Jie Li,John A. Lipa,J. M. Lockhart,Badr Alsuwaidan,M. Taber,S. Wang +26 more
TL;DR: Gravity Probe B, launched 20 April 2004, is a space experiment testing two fundamental predictions of Einstein's theory of general relativity, the geodetic and frame-dragging effects, by means of cryogenic gyroscopes in Earth orbit, results in a geodetically drift rate of -6601.8±18.3 mas/yr.
Journal ArticleDOI
Measurement of gravitational acceleration by dropping atoms
TL;DR: In this article, an atom interferometer based on a fountain of laser-cooled atoms was used to measure the acceleration of gravity, achieving an absolute uncertainty of Δg/g ≈ 3 × 10−9.
Journal ArticleDOI
Time and Frequency (Time-Domain) Characterization, Estimation, and Prediction of Precision Clocks and Oscillators
TL;DR: A tutorial review of some time-domain methods of characterizing the performance of precision clocks and oscillators is presented, and both the systematic and random deviations are considered.
Journal ArticleDOI
Nonlinear atom interferometer surpasses classical precision limit
TL;DR: It is shown experimentally that the classical precision limit can be surpassed using nonlinear atom interferometry with a Bose–Einstein condensate and the results provide information on the many-particle quantum state, and imply the entanglement of 170 atoms.