Extra-substrate control system
View Patent ↗The present invention generally involves an extra-substrate control system comprising a first substrate, attached to which is at least one superconducting structure, and a second substrate, connected to which is at least one element of circuitry, wherein the superconducting structure and the circuitry interact, so that a change in a state of the superconducting structure can be detected by the circuitry. The present invention also provides a quantum computing apparatus comprising a first substrate, attached to which is one or more layers of material, at least one of which is a superconducting material, a second substrate, deposited on which is a flux shield and on the flux shield is at least one element of circuitry, wherein the superconducting material and the second substrate are separated by a mean distance that is small enough to permit coupling between the element of circuitry and the superconducting material.
1. A quantum computing apparatus comprising:
a first substrate, attached to which is a layer of superconducting material;
a second substrate, deposited on which is a flux shield and on the flux shield is at least one element of circuitry;
wherein the superconducting material and the second substrate are separated by a mean distance that is small enough to permit coupling between the at least one element of circuitry end the superconducting material.
2. An extra-substrate control system comprising:
a first substrate, attached to which is at least one superconducting structure; and
a second substrate, connected to which is at least one element of circuitry; wherein the superconducting structure and the at least one element or circuitry are configured to interact by inductive coupling, so that a change in a quantum state of the superconducting structure can be detected by the at least one element of circultry; and
a flux shield in inductive communication with at least one superconducting structure.
3. The extra-substrate control system of claim 2 further comprising a mechanism for controlling the interaction of the at least one element of circuitry with other devices.
4. The extra-substrate control system of claim 2 , additionally-comprising, attached to the second substrate, a plurality of elements of integrated circuitry.
5. The extra-substrate control system of claim 2 , wherein the at least one element of circuitry is patterned on to the second substrate.
6. The extra-substrate control system of claim 2 wherein the coupling is inductive.
7. The extra-substrate control system of claim 2 wherein the flux shield is made from a superconducting material.
8. The extra-substrate control system of claim 2 wherein the flux shield is made from a composite of non-superconducting materials.
9. The extra-substrate control system of claim 7 wherein the superconducting material comprises a Type I superconducting material.
10. The extra-substrate control system of claim 7 wherein the superconducting material comprises niobium.
11. The extra-substrate control system of claim 2 wherein the flux shield contains an aperture.
12. The extra-substrate control system of claim 11 wherein the flux shield additionally comprises a slit that connects the aperture with the edge of the shield.
13. The extra-substrate control system of claim 2 wherein the superconducting structure comprises a qubit.
14. The extra-substrate control system of claim 13 wherein the qubit is a phase qubit.
15. The extra-substrate control system of claim 13 wherein the qubit is a charge qubit.
16. The extra-substrate control system of claim 13 wherein the qubit comprises a Josephson Junction.
17. The extra-substrate control system of claim 11 wherein the aperture is aligned with a qubit.
18. The extra-substrate control system of claim 2 wherein the flux shield comprises a plurality of apertures.
19. The extra-substrate control system of claim 2 wherein the first substrate and the second substrate are together a single substrate.
20. The extra-substrate control system of claim 2 , wherein the flux shield is between the second substrate, and the at least one element of circuitry.
21. The extra-substrate control system of claim 2 , wherein the flux shield is deposited on the first substrate.
22. The extra-substrate control system of claim 2 , wherein the flux shield is between the substrate and the at least one element of circuitry.