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Quantum limits to gravity estimation with optomechanics

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Title: Quantum limits to gravity estimation with optomechanics
Authors: Armata, F
Latmiral, L
Plato, ADK
Kim, MS
Item Type: Journal Article
Abstract: We present a table-top quantum estimation protocol to measure the gravitational acceleration g by using an optomechanical cavity. In particular, we exploit the nonlinear quantum light-matter interaction between an optical field and a massive mirror acting as mechanical oscillator. The gravitational field influences the system dynamics affecting the phase of the cavity field during the interaction. Reading out such a phase carried by the radiation leaking from the cavity, we provide an estimate of the gravitational acceleration through interference measurements. Contrary to previous studies, having adopted a fully quantum description, we are able to propose a quantum analysis proving the ultimate bound to the estimability of the gravitational acceleration and verifying optimality of homodyne detection. Noticeably, thanks to the light-matter decoupling at the measurement time, no initial cooling of the mechanical oscillator is demanded in principle.
Issue Date: 11-Oct-2017
Date of Acceptance: 30-Jun-2017
URI: http://hdl.handle.net/10044/1/54166
DOI: https://dx.doi.org/10.1103/PhysRevA.96.043824
ISSN: 1050-2947
Publisher: American Physical Society
Journal / Book Title: Physical Review A
Volume: 96
Issue: 4
Copyright Statement: ©2017 American Physical Society. Quantum limits to gravity estimation with optomechanics F. Armata, L. Latmiral, A. D. K. Plato, and M. S. Kim Phys. Rev. A 96, 043824 – Published 11 October 2017
Sponsor/Funder: Commission of the European Communities
The Leverhulme Trust
Funder's Grant Number: 317232
RPG-2014-055
Keywords: Science & Technology
Physical Sciences
Optics
Physics, Atomic, Molecular & Chemical
Physics
MOVING MIRROR
ACCELEROMETER
RESONATOR
MOTION
quant-ph
cond-mat.mes-hall
physics.optics
Publication Status: Published
Article Number: 043824
Appears in Collections:Quantum Optics and Laser Science
Physics
Faculty of Natural Sciences



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