Precision Ferrite-Based Electromagnetic Signal Circulators for Quantum Computing Systems

A quantum computing system, comprising:

• a plurality of qubits;
• a quantum logic circuit (QLC) that is enabled to perform a set of quantum operations on the plurality of qubits;
• and
• a circulator device that is enabled to non-reciprocally route signals associated with the set of quantum operations, wherein the circulator device comprises:
• a ferrite member;
• a magnetic member;
• and
• a pole assembly that in combination with at least the ferrite member and the magnetic member forms a magnetic circuit, wherein the pole assembly comprises a first pole member that has a spatial variance of a magnetic reluctance that provides an increase in a uniformity of a magnetic flux throughout a volume of the ferrite member to provide non-reciprocal behavior of the circulator device due to the increase in the uniformity of the magnetic, and wherein the first pole member being disposed between the ferrite member and the magnetic member.

A cryogenic system comprising:

• a cryogenic chamber;
• and
• a circulator device positioned within the cryogenic chamber, the circulator device comprising:
• a ferrite member;
• a magnetic member;
• and
• a pole assembly that in combination with at least the ferrite member and the magnetic member forms a magnetic circuit, wherein the pole assembly comprises a first pole member that has a spatial variance of a magnetic reluctance that provides an increase in a uniformity of a magnetic flux throughout a volume of the ferrite member to provide non-reciprocal behavior of the circulator device due to the increase in the uniformity of the magnetic flux, and wherein the first pole member being disposed between the ferrite member and the magnetic member.