Demonstrating Entanglement in a Classical Device

We describe a proposed experiment to measure entanglement in a classical device. The experimental procedure and data analysis protocol follow that of a previous experiment to measure an entanglement witness with polarized photons prepared in a mixed state [M. Barbieri \textit{et al.}, Phys.\ Rev.\ Lett.\ \textbf{91}, 227901 (2003)]. Numerical simulations suggest excellent agreement can be achieved with both the aforementioned photon experiment and quantum mechanical predictions.