IBM announced on Friday it has built a prototype 50 quantum bit (qubit) computer — the number some researchers think is needed to establish "quantum supremacy" over traditional computers. The company said its cloud computing platform will also be upgrading to a 20-qubit computer by the end of 2017.
Why it matters: Today's supercomputers are on processing par with quantum computers operating with less than 50 qubits. But quantum processors with more than 50 quantum bits are thought to be able to perform simulations and calculations that traditional computers cannot. IBM's previous version used 17 qubits.