Rotation sensing with improved stability using point-source atom interferometry
| Autor: | Dimitry Yankelev, Moshe Shuker, Ofer Firstenberg, Chen Avinadav, Nir Davidson |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Quantum Physics Atom interferometer Atomic Physics (physics.atom-ph) business.industry Point source Astrophysics::Instrumentation and Methods for Astrophysics FOS: Physical sciences Rotation 01 natural sciences Stability (probability) Signal Physics - Atomic Physics 010305 fluids & plasmas Interferometry Optics 0103 physical sciences Sensitivity (control systems) Quantum Physics (quant-ph) 010306 general physics business |
| Zdroj: | Physical Review A. 102 |
| ISSN: | 2469-9934 2469-9926 |
| Popis: | Point source atom interferometry is a promising approach for implementing robust, high-sensitivity, rotation sensors using cold atoms. However, its scale factor, i.e., the ratio between the interferometer signal and the actual rotation rate, depends on the initial conditions of the atomic cloud, which may drift in time and result in bias instability, particularly in compact devices with short interrogation times. We present two methods to stabilize the scale factor, one relying on a model-based correction which exploits correlations between multiple features of the interferometer output and works on a single-shot basis, and the other a self-calibrating method where a known bias rotation is applied to every other measurement, requiring no prior knowledge of the underlying model but reducing the sensor bandwidth by a factor of two. We demonstrate both schemes experimentally with complete suppression of scale factor drifts, maintaining the original rotation sensitivity and allowing for bias-free operation over several hours. Comment: C.A. and D.Y. contributed equally. The text consists of 6 pages, 6 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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