Rigetti Patent on Tuning Qubit-Control Line Coupling, 23rd Apr
Summary
Rigetti & Co, LLC filed patent application US20260111642A1 on October 25, 2024, published April 23, 2026, covering methods for tuning coupling strength between qubit devices and nearby control lines in superconducting quantum processors. The application names five inventors: Alysson Rebecca Gold, Brandon Wiliam Langley, Prasad Sarangapani, Benjamin Charles Scharmann, and Andrew Joseph Bestwick. CPC classifications include G06F 30/392, G06N 10/40, and G06F 2115/10, indicating quantum computing and processor design technology.
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USPTO classification G06N covers computer systems based on specific computational models: neural networks, knowledge representation, fuzzy logic, expert systems, evolutionary algorithms. With the AI patent boom, this is one of the most-filed application classes in the office. Every newly published application in G06N lands in this feed, around 230 a month. Patent applications publish 18 months after filing, so this feed reveals what AI labs and companies were working on in the prior year and a half. Watch this if you compete in machine learning, file freedom-to-operate analyses, scout acquisition targets in AI infrastructure, or track which research groups are converting publications to patents. GovPing pulls each application with the filing number, title, applicant, and abstract.
What changed
Rigetti & Co, LLC filed a patent application for tuning coupling strength between qubit devices and control lines in superconducting quantum processors. The method involves identifying designs of quantum processor wafers containing qubit devices with two qubit electrodes and SQUID loops, along with control lines that apply control signals through inductively and capacitively coupled circuits. Simulation data and experimental data from measurements are obtained and used to modify the design.
Quantum computing hardware manufacturers and semiconductor companies developing superconducting quantum processors should monitor this filing for competitive intelligence and potential freedom-to-operate considerations. Patent applications do not yet grant enforceable IP rights but establish priority dates that may be relevant to later-filed applications in similar technology areas.
Archived snapshot
Apr 24, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
TUNING COUPLING STRENGTH BETWEEN CONTROL LINES AND QUANTUM CIRCUIT DEVICES IN SUPERCONDUCTING QUANTUM PROCESSORS
Application US20260111642A1 Kind: A1 Apr 23, 2026
Assignee
Rigetti & Co, LLC
Inventors
Alysson Rebecca Gold, Brandon Wiliam Langley, Prasad Sarangapani, Benjamin Charles Scharmann, Andrew Joseph Bestwick
Abstract
In a general aspect, tuning the coupling strength between a qubit device and nearby control lines is described. In some implementations, a method includes identifying a design of first and second quantum processor wafers of a quantum processing system. The first quantum processor wafer includes a qubit device which includes two qubit electrodes and a SQUID loop. The second quantum processor wafer includes a control line which is configured to apply control signals to the qubit device and includes first and second control ports, a circuit loop inductively coupled to the SQUID loop, and conductive traces connected between the circuit loop and the respective first and second control ports. The control lines are capacitively coupled to the two qubit electrodes. The method includes obtaining simulation data and experimental data from measurements of the quantum processing system, and modifying the design based on the simulation data and the experimental data.
CPC Classifications
G06F 30/392 G06N 10/40 G06F 2115/10
Filing Date
2024-10-25
Application No.
18927307
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