Encoding and error suppression for superconducting quantum computers

A method of error correction for a quantum computing structure comprising:

• presenting a plurality of logical qubits, each of which comprises an operating physical qubit and an ancilla physical qubit, wherein:
• the logical states of the plurality of logical qubits are formed from a tensor product of the states of the operating and ancilla qubits;
• and
• wherein the states of the ancilla physical qubits are suppressed;
• and
• applying strong pulses to the grouping of logical qubits.

A quantum computing structure, comprising:

• one or more logical qubits, wherein the logical qubits are encoded into a plurality of superconducting qubits, wherein the superconducting qubits are phase qubits, and wherein the logical qubits comprise superconducting operating qubits and superconducting ancilla qubits, wherein operating qubits comprise:
• a first superconducting bank including a plurality of first fingers, coupled to the first Josephson junctions
• a first plurality of mesoscopic superconducting islands, wherein at least one of the first superconducting islands and the first superconducting bank comprise an unconventional superconducting material;
• and
• a first plurality of Josephson junctions between the first plurality of superconducting islands and the first superconducting bank;
• and
• ancilla qubits comprise:
• a second superconducting bank including a plurality of second fingers, coupled to the second Josephson junctions;
• a second plurality of mesoscopic superconducting islands, wherein at least one of the second superconducting islands and the second superconducting bank comprise an unconventional superconductor;
• and
• a second plurality of Josephson junctions between the second plurality of superconducting islands and the second superconducting bank.