This discovery goes a long way towards reconciling the theory of quantum computing with the engineering that would actually be needed to make the technology work. Like bites in regular computers, the basic unit of information in quantum computing is a qubit, and this experiment demonstrates how to turn a stray arsenic electron into a functioning qubit. However, this still leaves the practical application of this technology years in the future, as 10,000 qubits would be needed for a quantum computer to full its promise of instantaneous searching and unbreakable encryption. How many years off in the future does it leave it? Well, let's be on the safe side and say ten.