Quantum Elements Publishes Research on High-Fidelity Entangled Logical Qubits
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Quantum Elements, a Los Angeles-based quantum software start-up, has published research detailing the highest fidelity of entangled, logical qubits ever achieved on a superconducting quantum computer. The findings, appearing in Nature Communications, demonstrate a new error detection and suppression approach combining quantum error detection with a novel form of dynamical decoupling; researchers utilized a 127-qubit IBM processor for the experiments. This hybrid technique directly identifies and suppresses both logical and physical errors, resulting in average logical Bell state fidelities reaching 91, 94% and post-selected encoded Bell-state fidelities exceeding 98%. “We intend to fully integrate these new techniques into our existing software solutions to accelerate the development of fault-tolerant quantum computing for our customers and partners,” said Izhar Medalsy, co-founder and CEO of Quantum Elements. High-Fidelity Entangled Qubits via Logical Dynamical Decoupling This hybrid technique utilizes the normalizer elements of a standard quantum error detection code as logical-level decoupling pulses, a method that boosts the fidelity of entangled logical qubits on an IBM 127-qubit processor.
The team achieved performance exceeding the breakeven point, meaning encoded logical Bell states maintained higher fidelity over time than the best unencoded physical Bell pairs, even with physical-level dynamical decoupling already applied. This improvement was accomplished without adding qubits, utilizing a small, fixed set of logical pulse generators for error suppression, and offers a low-cost strategy for enhancing code performance. “By integrating code-based dynamical decoupling directly into the logical layer, the research shows that we can suppress errors more effectively than with physical techniques alone,” said co-author Daniel Lidar, holder of the Viterbi Professorship of Engineering at USC and co-founder and Chief Scientific Officer for Quantum Elements. Founded in 2023, Quantum Elements focuses on making quantum computing more accessible through its AI-native software and quantum Digital Twins. The pursuit of stable quantum computation took a significant step forward with the demonstration of record-high fidelity entangled logical qubits, achieved through a novel combination of quantum error detection and dynamical decoupling techniques. Current superconducting systems are susceptible to errors, and this research pushes the boundaries of qubit stability. This represents a substantial improvement over previous transmon-based demonstrations, which typically achieved 79, 93% fidelity. The method allows us to protect a pair of entangled logical qubits at record high fidelities on superconducting hardware, a potentially valuable step on the path to more reliable quantum computation at the error-corrected, logical level. Daniel Lidar, holder of the Viterbi Professorship of Engineering at USC and co-founder and Chief Scientific Officer for Quantum Elements Source: https://www.einpresswire.com/article/897352193/quantum-elements-announces-research-in-nature-communications-demonstrating-record-suppression-of-quantum-logical-errors 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: MIT Technique Identifies Critical Variables to Improve Design Optimization March 4, 2026 Xanadu Highlights Path to Public Listing, Scalable Quantum Computing March 4, 2026 MicroCloud Hologram Advances Deployable Quantum Recurrent Neural Network Technology March 4, 2026