Systems, methods, and apparatus for superconducting magnetic shielding
AssigneeD-Wave Systems Inc.
InventorsAndrew J. Berkley, Sergey V. Uchaykin, Thomas F. W. Mahon
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Abstract
A localized area is at least partially contained within a perimeter of a shield ring formed by a closed superconducting current path of a material that is superconductive below a critical temperature. The shield ring is at least partially within a perimeter of a compensation coil that is coupled to a current source. One or more measurement devices are responsive to magnetic fields in the vicinity of the localized area, allowing compensation by controlling current to the compensation coil. A heater can raise temperature of the shield ring out of a superconducting condition.
Claims21
A magnetic shielding system comprising:
- a superconducting processor chip;
- a first shield ring formed by a superconductive trace on the superconducting processor chip, wherein the superconductive trace forms a closed superconducting current path of a material that is superconductive below a critical temperature;
- a current control system that includes at least one electrical current source;
- a first compensation coil formed by a conductive current path that is conductively coupled to the current control system;
- and
- a first measurement device positioned to measure magnetic fields in a vicinity of the first shield ring, the first measurement device communicatively coupled to the current control system.
A method of controlling magnetic fields in a localized environment on a superconducting processor chip, the method comprising:
- at least partially forming a perimeter around the localized environment with at least one shield ring formed by a superconductive trace on the superconducting processor chip, wherein the superconductive trace forms a closed superconducting current path of a material that is superconductive below a critical temperature;
- measuring at least one magnetic field in at least one direction in a vicinity of the localized environment;
- controlling at least one current through at least one compensation coil to generate at least one compensatory magnetic field in the vicinity of the localized environment;
- refining the at least one current until the at least one magnetic field in the vicinity of the localized environment reaches a desired level;
- and
- trapping the at least one compensatory magnetic field with the at least one shield ring.
Dependencies are inferred from the claim text.