1. A superconducting readout system comprising: a first superconducting flux qubit including a qubit loop formed of a material that is superconducting below a critical temperature and at least one Josephson junction; a signal input line; a signal output line; and a variable transformer circuit comprising a DC-SQUID, a primary inductor, and a secondary inductor, wherein the DC-SQUID is communicatively coupleable to the qubit loop of the first superconducting flux qubit, the DC-SQUID and the primary inductor are electrically connected in parallel with one another with respect to the signal input line, the primary inductor and the secondary inductor are positioned sufficiently proximate one another to inductively couple signals therebetween, and the secondary inductor is electrically connected in series with the signal output line.