Origin Quantum Computing Achieves High-Accuracy Flux Crosstalk Compensation in Superconducting Qubits
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Researchers at Origin Quantum Computing Company Limited, working with the University of Science and Technology of China, have developed a new method to significantly reduce signal interference in superconducting qubits, a major hurdle in building more powerful quantum computers. Magnetic flux crosstalk between qubits and couplers limits the scalability of these processors, but the team’s spin-echo-based technique effectively separates quantum and flux crosstalk for more accurate characterization. This approach, detailed in a recent publication in Physics Applied, achieves stabilization of frequency-shift fluctuations at a noise baseline of approximately 20 kHz, with crosstalk coefficient accuracy reaching an order of 10−5 after compensation. “This method provides a robust and efficient framework for mitigating crosstalk, paving the way for high-fidelity control of large-scale quantum processors,” the researchers state, offering a path toward more stable and complex quantum systems. Spin-Echo Method Separates Quantum and Flux Crosstalk The team, led by Peng Duan and Guo-Ping Guo, addressed these challenges with a spin-echo-based method validated through experimentation, offering a pathway to more accurate characterization of flux crosstalk. This approach integrates a learning-based algorithm with a high-parallelism measurement scheme to boost efficiency, moving beyond previous limitations in crosstalk mitigation. Crucially, the accuracy of the crosstalk coefficient reached an order of 10−5 after compensation, indicating a significant reduction in unwanted signal interference. The research, which began with manuscript submission on June 6, 2025, and concluded with acceptance on January 21, 2026, represents a key advancement in addressing a fundamental obstacle to realizing practical quantum computation. Existing tunable coupling architectures, which rely on frequency-tunable qubits and couplers, are particularly susceptible to this interference; however, a newly validated spin-echo-based method effectively isolates quantum and flux crosstalk, allowing for more precise measurements. This separation is critical because quantum crosstalk induced by strong qubit-coupler interactions complicates traditional compensation methods.
The team’s innovation extends beyond improved measurement to include a learning-based algorithm integrated with a high-parallelism measurement scheme, significantly boosting efficiency. This approach achieves the stabilization of frequency-shift fluctuations at a noise baseline of approximately 20 kHz, with the accuracy of the crosstalk coefficient reaching an order of 10 − 5 after compensation. Source: http://link.aps.org/doi/10.1103/42lc-rd4t Tags: Quantum News There is so much happening right now in the field of technology, whether AI or the march of robots. Adrian is an expert on how technology can be transformative, especially frontier technologies. But Quantum occupies a special space. Quite literally a special space. A Hilbert space infact, haha! Here I try to provide some of the news that is considered breaking news in the Quantum Computing and Quantum tech space. Latest Posts by Quantum News: Keyfactor Advances Automation for Modern Digital Trust Environments March 4, 2026 University of Toronto Centre Awards Bell Prize for Neutral Atom Research March 4, 2026 Tessara Therapeutics Leads Consortium to Develop Quantum Brain-on-Chip Platform March 4, 2026