  Quantum computers take advantage of the superpositional logic of quantum
mechanics to allow for dramatic increases in computational efficiency.
rf-SQUIDs show potential for quantum computing applications by forming the
qubit component of a quantum computer, through simply treating the direction of
current - clockwise or counterclockwise - as the value of the bit. rf-SQUIDs
present a major advantage over atomic-scale qubit systems - they are sensitive
to parameters that can be engineered. Flux qubits are linked through controlled
inductive coupling: the magnetic field of each junction affects the others. The
strength of this coupling can be 'tuned,' allowing for refined control over the
behaviour of the system. rf-SQUIDs can also be mass produced on-chip, making
large-scale production feasible.
