Reshaping Noisy Quantum Channels to Boost Entanglement

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C2QA researchers developed a new adaptive framework that systematically transforms noisy quantum channels into more effective ones

April 10, 2026

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Adaptive reshaping converts many noisy entangled pairs into fewer high-quality ones.

Scientific Achievement

C2QA researchers at IBM developed adaptive protocols that transform highly noisy quantum channels into more favorable effective ones, enabling higher entanglement rates. This approach surpasses long-standing performance limits for common forms of quantum noise, including amplitude damping and depolarizing noise.

Significance and Impact

Entanglement distillation is essential for quantum networks and modular quantum systems. By increasing the amount of usable entanglement generated over noisy links, this work expands the performance limits of distributed systems, especially in high-noise regimes.

Research Details

Developed adaptive parity-check protocols to reshape noisy channels.
Introduced “Greedy recurrence” strategy with provable fidelity improvement.
Achieved entanglement rates exceeding long-standing bounds for amplitude damping and depolarizing noise.

Collaborating Institutions

Publication

D. Abdelhadi, T. Jochym-O’Connor, V. Siddhu, and J. Smolin
Adaptive channel reshaping for improved entanglement distillation
Physical Review Research 8, 013018 (2026)
DOI: https://doi.org/10.1103/8kdf-37gp

Acknowledgements

D. Abdelhadi is grateful to IBM T.J. Watson Research Center’s hospitality, where part of this work was carried out as part of an internship. T. Jochym-O’Connor, V. Siddhu, and J. Smolin were supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Co-design Center for Quantum Advantage (C2QA) under Contract No. DE-SC0012704.

2026-22901 | INT/EXT | Newsroom

About C2QA

The U.S. Department of Energy Office of Science has established five National Quantum Information Science (QIS) Research Centers. These centers will accelerate the transformational advances in basic science and quantum-based technologies needed to assure continued U.S. leadership in QIS, consistent with the National Quantum Initiative Act. Led by Brookhaven National Laboratory, the Co-design Center for Quantum Advantage is building the fundamental tools necessary to create scalable, distributed, and fault-tolerant quantum computer systems.