Talk on "Gravimetry through non-linear optomechanics"

05.04.2018 15:00 - 16:30

by Sofia Qvarfort; Quantum Information Group, University College London, UK

Many quantum systems have been used for measuring gravitational acceleration to date, such as atom interferometers and on-chip BECs. In this work, we propose a new method for measurements of gravitational acceleration using a quantum optomechanical system. As a proof-of-concept, we investigate the fundamental sensitivity for a cavity optomechanical system for gravitational accelerometry, where the phase of the optical output of the cavity encodes the gravitational acceleration g. We show that the optimal measurement of g is a homodyne measurement, and we predict a fundamental sensitivity of Δg = 10^(-15) ms-2 for currently achievable optomechanical systems which could, in principle, surpass the best atomic interferometers even for low optical intensities. In my talk, I will describe the methods used to compute this sensitivity and briefly discuss the experimental conditions that need to be met in order to realise this scheme.

arXiv:1706.09131

 

Hosted by: Markus Aspelmeyer

 

 

 

 

At 15:00-16:30

Thursday, 5th April 2018

 

Ernst-Mach-HS, 2nd floor

Boltzmanngasse 5, 1090 Vienna

 

Hosted by: Markus Aspelmeyer

Location:
Ernst-Mach-HS, 2nd floor, Boltzmanngasse 5, 1090 Vienna