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

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.

A preliminary version of this paper has been accepted to appear in the 2014 Australian Control Conference