# How D-Wave Clears Magnetic Noise in Quantum Computers > A method for improving quantum computer accuracy by actively clearing out magnetic interference that builds up during calculations. - **Patent:** US 11295225 - **Original title:** Superconducting quantum processor and method of operating same - **Owner:** D Wave Systems Inc - **Granted:** 2022 - **Status:** Active - **Times cited:** 13 - **Field:** semiconductors, ai_ml, consumer_electronics ## What it does Quantum processors often suffer from 'spin-bath polarization,' which is essentially magnetic noise that builds up in the environment surrounding the qubits during a calculation. This patent describes a way to reset this environment by forcing the qubit into an opposite state after a calculation is finished. By raising a 'tunneling barrier'—which acts like a gate to lock the qubit's state—the system holds the qubit in this corrective position for a specific amount of time. This process effectively depolarizes the surrounding environment, allowing the quantum processor to start its next calculation without the lingering magnetic interference from the previous one. ## What it does NOT cover - Does not cover passive cooling techniques that do not involve active qubit state manipulation - Does not cover quantum gate-based processors that do not utilize quantum annealing cycles - Does not cover error correction methods that rely solely on software algorithms rather than physical qubit state latching - Does not cover systems that do not use superconducting qubits ## The clever bit Instead of trying to shield the qubit from noise, the system uses the qubit itself as a tool to 'flush' the noise out by intentionally flipping its state and holding it there to cancel out the accumulated magnetic polarization. ## Real-world examples 1. D-Wave Advantage quantum annealing processors 2. Superconducting quantum annealing hardware ## Why it matters Quantum computers are incredibly sensitive to noise. If the environment doesn't 'reset' between operations, the errors accumulate, making the final result useless. D-Wave Systems, a leader in quantum annealing, uses this technology to make their processors more reliable for complex optimization problems, such as logistics or financial modeling. ## Frequently asked questions ### What does How D-Wave Clears Magnetic Noise in Quantum Computers cover? A method for improving quantum computer accuracy by actively clearing out magnetic interference that builds up during calculations. ### Who owns patent US 11295225? D Wave Systems Inc owns this patent, granted in 2022. ### When does this patent expire? This patent is expected to expire on July 6, 2038, when the invention enters the public domain. ### What is patent US 11295225 cited by? This patent has been cited by 13 later patents that build on its ideas. ### What problem does this patent solve? Quantum computers are incredibly sensitive to noise. If the environment doesn't 'reset' between operations, the errors accumulate, making the final result useless. D-Wave Systems, a leader in quantum annealing, uses this technology to make their processors more reliable for complex optimization problems, such as logistics or financial modeling. ### What does this patent NOT cover? Does not cover passive cooling techniques that do not involve active qubit state manipulation **Full plain-English explainer:** https://patentbrief.org/patent/us/11295225/superconducting-quantum-processor-and-method-of-operating-same **Original patent:** https://patents.google.com/patent/US11295225 --- _Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._ ## Related patents Semantically similar inventions in the PatentBrief corpus: - [How Quantum Computers Use Special Devices to Control Qubits](https://patentbrief.org/patent/us/9256834/quantum-computers-having-partial-interferometric-quantum-gates) — This patent describes a way for quantum computers to control special quantum bits, called topological qubits, using a "partial interferometric device" to perform specific operations. - [How Quantum Computers Learn to Sort Data](https://patentbrief.org/patent/us/20240296359/classification-using-quantum-neural-networks) — This patent describes a method for training a data classifier using a quantum computer, where classical AI helps prepare the data and interpret the quantum results to improve the quantum system's ability to sort information. - [How to Fix Faulty Memory Cells in AI Chips](https://patentbrief.org/patent/us/10956815/killing-asymmetric-resistive-processing-units-for-neural-network-training) — This patent describes a system that tests individual memory cells in AI chips for uneven behavior and then permanently disables the faulty ones before the chip starts learning, making AI training more efficient. - [Removing Radio Interference from Portable MRI Scans](https://patentbrief.org/patent/us/12189012/eva-suit) — A method to clean up MRI images by using external sensors to detect and subtract outside radio interference, allowing portable scanners to work outside shielded rooms. - [How Nanoparticles Form Adaptive Neural Network Connections](https://patentbrief.org/patent/us/8156057/adaptive-neural-network-utilizing-nanotechnology-based-components) — This patent describes how to build and strengthen a physical neural network using tiny nanoparticles suspended in a liquid, where electric fields make the connections learn and adapt.