Author

Mark Webster

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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 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

Preprint Jul 2026

Efficiently simulable quantum circuits with large entanglement, magic, and non-Gaussianity via code-compiled tensor networks

We introduce a family of quantum circuits that possess standard indicators of classical simulation hardness including high entanglement entropy, magic, and non-Gaussianity, yet admit efficient classical simulation via matrix product states (MPS). Our construction uses logical circuits of high-rate Calderbank-Shor-Stean...

Aydin Deger, Stergios Koutsioumpas, Mark A. Webster et al. · 1 citation