Details

Autor(en) / Beteiligte

• Xiao, Xiao
• Liang, Hongbin
• Wang, Xiaoguang

Titel

Optimal estimation of gravitation with Kerr nonlinearity in an optomechanical system

Ist Teil von

• Quantum information processing, 2020-11, Vol.19 (11), Article 410

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2020

Quelle

SpringerLink

Beschreibungen/Notizen

• We present a high precision scheme of a gravitational accelerometer which consists of an optomechanical system embedding a Kerr nonlinear medium. The quantum Cramér–Rao bound and the quantum Fisher information (QFI) are well-known tools to depict the ultimate precision limit in quantum parameter estimation. In our scheme, the analytical expression of time-dependent QFI is obtained with the absence of noise, which shows that the precision has been improved due to the existence of Kerr nonlinearity. At the light-matter decoupling time, the theoretical bound for the relative sensitivity is Δ g / g ≈ 6.36 × 10 - 13 .