Qvarfort, S;
Serafini, A;
Barker, PF;
Bose, S;
(2018)
Gravimetry through non-linear optomechanics.
Nature Communications
, 9
(1)
, Article 3690. 10.1038/s41467-018-06037-z.
Preview |
Text
Gravimetry through non-linear optomechanics.pdf - Published Version Download (869kB) | Preview |
Abstract
Precision gravimetry is key to a number of scientific and industrial applications, including climate change research, space exploration, geological surveys and fundamental investigations into the nature of gravity. A variety of quantum systems, such as atom interferometry and on-chip-Bose–Einstein condensates have thus far been investigated to this aim. Here, we propose a new method which involves using a quantum optomechanical system for measurements of gravitational acceleration. As a proof-of-concept, we investigate the fundamental sensitivity for gravitational accelerometry of a cavity optomechanical system with a trilinear radiation pressure light-matter interaction. The phase of the optical output encodes the gravitational acceleration g and is the only component which needs to be measured. We prove analytically that homodyne detection is the optimal readout method and we predict an ideal fundamental sensitivity of Δg = 10−15 ms−2 for state-of-the-art parameters of optomechanical systems, showing that they could, in principle, surpass the best atomic interferometers even for low optical intensities. Further, we show that the scheme is strikingly robust to the initial thermal state of the oscillator.
| Type: | Article |
|---|---|
| Title: | Gravimetry through non-linear optomechanics |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41467-018-06037-z |
| Publisher version: | http://dx.doi.org/10.1038/s41467-018-06037-z |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
| Keywords: | quantum, optomechanics, metrology, gravity, gravitational acceleration, Fisher information, quantum metrology, quantum Fisher information, measurement, atom interferometry |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10055978 |
Archive Staff Only
 |
View Item |
