Author

Teck Seng Koh

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Preprint Aug 2026

Towards fault-tolerance with universal phase-error-transparent gates for high-spin cat codes

High-dimensional nuclear spins offer a hardware-efficient route to quantum error correction (QEC), with the spin cat code providing intrinsic robustness against phase errors -- the dominant noise channel in donor-in-silicon architectures. However, realizing the full potential of this encoding requires gate operations t...

K. Onggadinata, Si Yan Koh, Arghya Maity et al. · 0 citations

Preprint Aug 2026

Exact Tradeoff Between Quantum Error Correction and Quantum Darwinism: An Information-Theoretic No-Go Theorem

Quantum error correction (QEC) and Quantum Darwinism describe opposing consequences of system-environment interactions: QEC seeks to preserve logical quantum information, whereas Quantum Darwinism explains the emergence of objective classical information through its proliferation into the environment. Despite their com...

Arghya Maity, K. Onggadinata, Teck Seng Koh · 0 citations