Related papers: Backaction suppression in levitated optomechanics using reflective boundaries

Backaction suppression in levitated optomechanics using reflective boundaries

URL: http://arxiv.org/abs/2405.04366v1
Date: Tue, 7 May 2024 14:46:48 GMT
Title: Backaction suppression in levitated optomechanics using reflective boundaries
Authors: Rafał Gajewski, James Bateman,
Abstract summary: We show theoretically that the noise due to laser induced backaction acting on a small nanosphere levitated in a standing-wave trap can be considerably reduced by utilising a suitable reflective boundary. We study the effects of laser recoil directly, by analysing optical force fluctuations acting on a dipolar particle trapped at the centre of a spherical mirror.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We show theoretically that the noise due to laser induced backaction acting on a small nanosphere levitated in a standing-wave trap can be considerably reduced by utilising a suitable reflective boundary. We examine the spherical mirror geometry as a case study of this backaction suppression effect, discussing the theoretical and experimental constraints. We study the effects of laser recoil directly, by analysing optical force fluctuations acting on a dipolar particle trapped at the centre of a spherical mirror. We also compute the corresponding measurement imprecision in an interferometric, shot-noise-limited position measurement, using the formalism of Fisher information flow. Our results show that the standing-wave trapping field is necessary for backaction suppression in three dimensions, and they satisfy the Heisenberg limit of detection.

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