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Author

Nicolas Delfosse

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Preprint Sep 2026

Soft decoding for quantum LDPC codes with experimental validation

A soft beam search decoder for quantum low-density parity-check codes that uses internal decoder data as a confidence metric, removing the need for extra computation is introduced.

Arda Aydin, Edwin Tham, Nicolas Delfosse et al. · 2 citations
Preprint Sep 2026

Computing 256-bit elliptic curve discrete logarithms in 26 days on a fault-tolerant trapped-ion quantum computer with 20,000 qubits

It is concluded that a trapped-ion quantum computer based on the Walking Cat Architecture can solve the ECDLP onsecp256k1 in approximately 25.7 days using 19,397 physical qubits with an estimated success probability of 63%.

Thomas Häner, Felix Tripier, Jacob Young et al. · 2 citations · ⚡1
Preprint Aug 2026

Real-time decoder for a MegaQuOp quantum computer using a single CPU

An end-to-end real-time decoding stack for a universal fault-tolerant trapped-ion quantum computer architecture capable of decoding real workloads with millions of logical gates over hundreds of logical qubits is demonstrated.

Min Ye, Andrii O. Maksymov, Nicolas Delfosse · 2 citations
Preprint Jul 2026

Fast logical operations in quantum LDPC codes using simple resource states

This work designs a protocol for the joint measurement of $\ell$ commuting logical operators and designs a scheduler code determining the measurement sequence and allowing for the decoding of all logical measurement outcomes.

Mark Webster, Nicolas Delfosse · 1 citation · ⚡1

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