rf-SQUID Technology for Quantum Computer Qubit State Monitoring
Summary
USPTO published patent application US20260111780A1 on April 23, 2026, filed October 17, 2024 with application number 18919218. The application, invented by Tejinder Singh and Navjotjot Kaur Khaira, covers distributed radio-frequency superconducting quantum interference devices (rf-SQUIDs) for real-time monitoring of qubit states in quantum computers. The system uses a superconducting control wire carrying RF signals to detect phase shifts without adding load or noise to superconducting quantum circuit wires, enhancing detection of qubit entanglement, decoherence, and state changes.
“The technology described herein is directed towards real-time monitoring of qubit states in quantum computers using a system based on distributed rf-SQUIDs (radio-frequency superconducting quantum interference devices) and a control line/detection line that carries RF signals from and to a classical computing device.”
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What changed
USPTO published a patent application for rf-SQUID-based qubit state detection technology for quantum computing systems. The application covers distributed rf-SQUIDs positioned between superconducting quantum circuit wires, operating in parallel with a control line/detection wire to detect phase shifts without introducing load or noise. The system enables dynamic, precise monitoring of qubit entanglement, decoherence, and state changes with real-time feedback capability.
Affected parties include quantum computing hardware developers, superconducting circuit manufacturers, and entities developing quantum error correction systems. While the application does not impose compliance obligations, it establishes intellectual property claims that may influence technology development trajectories and patent landscape considerations for quantum computing research programs.
Archived snapshot
Apr 23, 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.
DISTRIBUTED RADIO FREQUENCY SUPERCONDUCTING QUANTUM INTERFERENCE DEVICES FOR QUBIT STATE DETECTION USING A SUPERCONDUCTING CONTROL WIRE
Application US20260111780A1 Kind: A1 Apr 23, 2026
Inventors
Tejinder Singh, Navjot Kaur Khaira
Abstract
The technology described herein is directed towards real-time monitoring of qubit states in quantum computers using a system based on distributed rf-SQUIDs (radio-frequency superconducting quantum interference devices) and a control line/detection line that carries RF signals from and to a classical computing device. In one implementation, the rf-SQUIDs are distributed at specific distances between superconducting quantum circuit wires, and parallel to the control line/detection wire). The control line facilitates the detection of phase shifts without adding load or noise to the superconducting quantum circuit wires, which enhances the detection of qubit entanglement, decoherence, and/or other qubit state changes. The monitoring and detection system dynamically and precisely monitors qubit state changes and provides real-time feedback to the quantum circuits to adjust the qubit states to maintain the integrity of quantum computations.
CPC Classifications
G06N 10/40
Filing Date
2024-10-17
Application No.
18919218
Parties
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