Filed under: Misc. GadgetsIt looks like quantum computing could now be one step closer to some form of practicality, as a team of researchers from the University of Queensland have announced that they've created a light-based quantum circuit that's capable of performing basic calculations. According to ZDNET Australia, that was done by using a laser to send "entangled" photons through a linear optical circuit, which allowed them to create a circuit consisting of four "qubits," (or quantum bits, pictured at right), which in turn allowed them to calculate the prime roots of fifteen, three and f