Quantum computing: How far away is it?

Abstract

Moore's law is pushing the technology to the scale where quantum phenonema, such as quantum tunneling, can no longer be ignored. Where in conventional CMOS one tries to avoid unwanted quantum behaviour, quantum computing actually embraces these phenomena for computational purposes. The famous physicist Richard Feyman was the first to describe the idea of using superposition and entanglement as a way to model and simulate quantum phenomena.