Quantum Register

quantum-computing

Definition

Quantum Register

An -qubit quantum register is an ordered collection of qubits whose pure quantum state is a unit vector in the tensor product state space

Its computational basis is indexed by bit strings :

A general pure state of the register has the form

Quantum gates act on the register as unitary operators .

Example

Example

A 2-qubit register has state space with computational basis . A general state is

with .