US 11,984,886 B2
Superconducting circuit with magnetic-flux-tunable elements, and methods for minimizing flux crosstalk between magnetic flux-tunable elements in superconducting circuits
Caspar Ockeloen-Korppi, Espoo (FI); Jukka Räbinä, Kuopio (FI); Johannes Heinsoo, Espoo (FI); and Juha Hassel, Espoo (FI)
Assigned to IQM Finland Oy, Espoo (FI)
Filed by IQM FINLAND OY, Espoo (FI)
Filed on Nov. 7, 2023, as Appl. No. 18/503,715.
Application 18/503,715 is a continuation of application No. PCT/FI2021/050477, filed on Jun. 22, 2021.
Prior Publication US 2024/0072796 A1, Feb. 29, 2024
Int. Cl. H03K 17/92 (2006.01)
CPC H03K 17/92 (2013.01) 13 Claims
OG exemplary drawing
 
1. A superconducting circuit, comprising:
a first magnetic-flux-tunable element and a second magnetic-flux-tunable element, each having a respective flux-sensitive part, electric characteristics of said magnetic-flux-tunable elements being dependent on a magnetic flux at the location of the respective flux-sensitive part,
a first current-driven superconductive on-chip flux bias line and a second current-driven superconductive on-chip flux bias line, each passing adjacent to the flux-sensitive part of the respective magnetic-flux-tunable element,
a first plurality of superconductive stray current paths adjacent to the first magnetic-flux-tunable element, and
a second plurality of superconductive stray current paths adjacent to the second magnetic-flux-tunable element;
wherein each of the first and second pluralities of superconductive stray current paths is configured to distribute stray currents originating from the current-driven superconductive on-chip flux bias line of the other magnetic-flux-tunable element into a respective plurality of stray currents around the respective magnetic-flux-tunable element such that said plurality of stray currents are kept from changing the electric characteristics of the respective magnetic-flux-tunable element.