A Direct Coupling Coherent Quantum Observer

TL;DR

This paper introduces a direct coupling quantum observer designed for a closed linear quantum system, capable of estimating certain plant variables in a time-averaged manner, with illustrative examples and simulations.

Contribution

It presents a novel direct coupling quantum observer that estimates specific plant variables in a time-averaged sense, expanding quantum control methods.

Findings

Observer can estimate some plant variables in a time-averaged sense

The approach is demonstrated with a simple example

Simulations confirm the observer's properties

Abstract

This paper considers the problem of constructing a direct coupling quantum observer for a closed linear quantum system. The proposed observer is shown to be able to estimate some but not all of the plant variables in a time averaged sense. A simple example and simulations are included to illustrate the properties of the observer.