Enhanced phase sensitivity in a feedback-assisted interferometer

The topology of feedback optical parametric amplifier (FOPA) renders a number of significant advantages over the topology of traditional optical parametric amplifier (TOPA) such as a higher degree of quantum correlation, all-phase entanglement enhancement, and the robustness of the losses. Here, we...

Full description

Saved in:
Bibliographic Details
Published in:New journal of physics 2024-08, Vol.26 (8), p.83005
Main Author: Jiao, Gao-Feng
Format: Article
Language:English
Subjects:
Cramer-Rao bounds
Feedback
Interferometers
Parameter sensitivity
Parametric amplifiers
phase sensitivity
standard quantum limit
Topology
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The topology of feedback optical parametric amplifier (FOPA) renders a number of significant advantages over the topology of traditional optical parametric amplifier (TOPA) such as a higher degree of quantum correlation, all-phase entanglement enhancement, and the robustness of the losses. Here, we propose a feedback-assisted interferometer based on the topology of FOPA for quantum metrology. We theoretically study the phase sensitivity with the method of homodyne detection and product detection. By manipulating the feedback strength of the FOPA, the phase sensitivity can be further enhanced, and approach the quantum Cramér-Rao bound. Furthermore, we demonstrate that our proposal is superior to the SU(1,1) interferometer based on the topology of TOPA.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/ad69b9