Estimation of the disorder degree of the classical static noise using three entangled qubits as quantum probes (Q823540)

This paper is concerned with the estimation of the disorder degree of the classical static noise. The authors extend a recent analysis, which uses only one qubit as the quantum probe, by using a system of three qubits as the quantum probe. Furthermore, the authors explore three different probing scenarios: common, independent, and mixed environments. Among others the authors conclude that in the independent and in the mixed environment scenario, the precision of the estimation can be improved by using a system of three entangled qubits instead of only one qubit as the quantum probe.