Nature Outline 

Quantum computing

Quantum computers are big news, each week brings reports of fresh advances in stability and power. But for many people, the quantum world is mysterious and confusing. In this Outline we explain the differences between classical and quantum computing, and introduce readers to the basic terminology; explore the challenges faced by researchers and engineers as they attempt to build a working quantum computer; and give a flavour of how quantum computers could revolutionize science and technology.