A Direct Coupling Coherent Quantum Observer for a Single Qubit Finite Level Quantum System

TL;DR

This paper introduces a direct coupling quantum observer for a single qubit system, capable of estimating a plant variable in a time-averaged manner, with numerical validation included.

Contribution

It presents a novel single mode linear quantum observer specifically designed for a single qubit system, demonstrating effective variable estimation.

Findings

Successful estimation of plant variables in simulations

The observer operates in a time-averaged sense

Numerical examples validate the approach

Abstract

This paper considers the problem of constructing a direct coupling quantum observer for a single qubit finite level quantum system plant. The proposed observer is a single mode linear quantum system which is shown to be able to estimate one of the plant variables in a time averaged sense. A numerical example and simulations are included to illustrate the properties of the observer.