A numerical model for determining the relative accuracy of the Landé g-factor obtained from ac and dc conductance measurements of Quantum Point Contacts

A number of approaches currently exist for obtaining the Landé effective g-factor g* from experimental measurements of the ac and dc conductance of AlGaAs/GaAs Quantum Point Contacts (QPCs). The correspondence between these methods is not perfect, motivating us to develop an analytical model for assessing the relative accuracy of the various approaches using a perfect, experimental artefact-free data-set. We will present a comparative study of the accuracy of ac and dc-based methods for determining the g-factor in QPCs.