Superposition
중첩
The property that lets a qubit be in both the 0 and 1 states at once.
Overview
In the world we live in, a light is either on or off. In the world of very small things like atoms, two states can really exist mixed together, and settle on one the moment you measure.
When several qubits are in superposition, the number of possibilities they can handle doubles with every qubit you add. This is why a quantum computer is strong at certain problems.
An everyday example
If an ordinary bit is like pressing one piano key, superposition is like pressing two keys together to play a chord.
Why it matters
It is the first step to understanding why a quantum computer is different. But superposition breaks easily, even from tiny disturbances nearby, so protecting it is a core challenge of the technology.
Also calledquantum superposition