High fidelity threshold detection of single microwave photons using a quantum non-demolition photon detector
US-2018101785-A1 · Apr 12, 2018 · US
Josephson junctions for improved qubits
US10268968B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10268968-B2 |
| Application number | US-201715813441-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 15, 2017 |
| Priority date | Aug 4, 2017 |
| Publication date | Apr 23, 2019 |
| Grant date | Apr 23, 2019 |
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- Title
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- Abstract
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Abstract
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A technique relates to a superconducting qubit. A Josephson junction includes a first superconductor and a second superconductor formed on a non-superconducting metal. A capacitor is coupled in parallel with the Josephson junction.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of fabricating a superconducting qubit comprising: providing a Josephson junction, the Josephson junction including a first superconductor and a second superconductor formed on a non-superconducting metal; and coupling a capacitor in parallel with the Josephson junction, the capacitor being a separate structure from the first superconductor and the second superconductor forming the Josephson junction. 2. The method of claim 1 , wherein the first superconductor and the second superconductor are separated from one another. 3. The method of claim 1 , wherein a space separates the first superconductor and the second superconductor. 4. The method of claim 3 , wherein a dimension of the space is about 0.1-10 microns. 5. The method of claim 1 , wherein the non-superconducting metal is formed on a semiconductor. 6. The method of claim 1 , wherein the non-superconducting metal comprises copper. 7. The method of claim 1 , wherein the non-superconducting metal comprises platinum. 8. A method of fabricating a superconducting qubit comprising: providing a Josephson junction, the Josephson junction including a non-superconducting metal formed between a first superconductor and a second superconductor; and coupling a capacitor in parallel with the Josephson junction, the capacitor being a separate structure from the first superconductor and the second superconductor forming the Josephson junction. 9. The method of claim 8 , wherein the non-superconducting metal is formed on top a part of both the first superconductor and the second superconductor. 10. A method of forming a microwave device comprising: providing a superconducting qubit, the superconducting qubit including a Josephson junction having a first superconductor, a second superconductor, and a non-superconducting metal; and coupling a readout resonator to the superconducting qubit. 11. The method of claim 1 , wherein the capacitor is formed at a separate location on the non-superconducting metal from the first superconductor and the second superconductor forming the Josephson junction.
Assignees
Inventors
Classifications
with electro-magnetic coupling of the control current · CPC title
electrically programmable · CPC title
using super-conductive elements, e.g. cryotron · CPC title
Electricity · mapped topic
- G06N99/002Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US10268968B2 cover?
- A technique relates to a superconducting qubit. A Josephson junction includes a first superconductor and a second superconductor formed on a non-superconducting metal. A capacitor is coupled in parallel with the Josephson junction.
- Who is the assignee on this patent?
- IBM
- What technology area does this patent fall under?
- Primary CPC classification G06N99/002. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 23 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 10 related publications on this page (citations in our corpus or others sharing the same primary CPC).