System and method for controlling superconducting quantum circuits using single flux quantum logic circuits
US-2015358022-A1 · Dec 10, 2015 · US
Reducing spontaneous emission in circuit quantum electrodynamics by a combined readout and filter technique
US9438245B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9438245-B2 |
| Application number | US-201414512489-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 13, 2014 |
| Priority date | Oct 13, 2014 |
| Publication date | Sep 6, 2016 |
| Grant date | Sep 6, 2016 |
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Abstract
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A mechanism relates a superconductor circuit. A Δ circuit includes a first node connecting a Purcell capacitor to a qubit coupling capacitor, a second node connecting the Purcell capacitor to a readout coupling capacitor, and a third node connecting the qubit coupling capacitor to the readout coupling capacitor. A qubit is connected to the first node and has a qubit frequency. A readout resonator connects to the third node combining with the Purcell capacitor to form a filter. Capacitance of the Purcell capacitor is determined as a factor of the qubit frequency of the qubit and blocks emissions of the qubit at the qubit frequency. Capacitance of the Purcell capacitor causes destructive interference, between a first path containing Purcell capacitor and a second path containing both the qubit coupling capacitor and readout coupling capacitor, in order to block emissions of the qubit at the qubit frequency to the external environment.
First claim
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What is claimed is: 1. A superconductor circuit comprising: a delta (Δ) circuit comprising a first node connecting a Purcell capacitor (C P ) to a qubit coupling capacitor (C q ), a second node connecting the Purcell capacitor (C P ) to a readout coupling capacitor (C c ), and a third node connecting the qubit coupling capacitor (C q ) to the readout coupling capacitor (C c ); a qubit connected to the first node, wherein the qubit has a qubit frequency; a readout resonator con…
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- H03K19/195Primary
Electricity · mapped topic
- H03K19/00346Primary
Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US9438245B2 cover?
- A mechanism relates a superconductor circuit. A Δ circuit includes a first node connecting a Purcell capacitor to a qubit coupling capacitor, a second node connecting the Purcell capacitor to a readout coupling capacitor, and a third node connecting the qubit coupling capacitor to the readout coupling capacitor. A qubit is connected to the first node and has a qubit frequency. A readout resonat…
- Who is the assignee on this patent?
- IBM
- What technology area does this patent fall under?
- Primary CPC classification H03K19/195. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 06 2016 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).