Architecture for local programming of quantum processor elements using latching qubits

A superconducting system comprising:

• a computation qubit including at least one loop of superconducting material and at least one Josephson junction, wherein the computation qubit is configured to perform at least a portion of a computation;
• a signal input structure;
• and
• a latching qubit including a first loop of superconducting material and a compound Josephson junction that interrupts the first loop of superconducting material, the compound Josephson junction comprising a closed loop of superconducting material interrupted by at least two Josephson junctions, wherein the first loop of superconducting material and the compound Josephson junction form a closed superconducting current path, and wherein the first loop of superconducting material of the latching qubit is communicatively coupleable to the computation qubit and the compound Josephson junction of the latching qubit is communicatively coupleable to the signal input structure.

A superconducting system comprising:

• a first computation qubit including at least one loop of superconducting material and at least one Josephson junction, wherein the first computation qubit is configured to perform at least a portion of a computation;
• and
• a superconducting shift register comprising a plurality of latching qubits arranged in a line of sequential coupling such that each latching qubit is inductively or galvanically coupled to at least one other adjacent latching qubit, wherein each respective latching qubit in the superconducting shift register includes a first loop of superconducting material and a compound Josephson junction that interrupts the first loop of superconducting material, the compound Josephson junction comprising a closed loop of superconducting material interrupted by at least two Josephson junctions, and wherein the first loop of superconducting material and the compound Josephson junction form a closed superconducting current path;
• wherein the compound Josephson junction of each respective latching qubit in the superconducting shift register is inductively or galvanically coupled to a respective signal input structure and a first one of the latching qubits in the superconducting shift register is inductively or galvanically coupled to the first computation qubit.