TBNQuantum
Magic Quantum Code Surgery
Publication: quant-ph updates on arXiv.org
Author: Kathleen Chang, Anasuya Lyons, Yuanjie Ren, Harald Putterman, Nathanan Tantivasadakarn, Victor V. Albert, Benjamin J. Brown, Dominic J. Williamson
Source published: 06/10/2026, 04:00:00 UTC
Briefing created: 06/10/2026, 05:01:29 UTC
Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 06/10/2026, 04:13:25 UTC.
Briefings
A new framework enables fault-tolerant measurement of transversal Clifford operators in quantum QLDPC codes using ancillary qubits, preserving code distance up to a constant factor. This method allows implementation of non-Clifford operations and magic state preparation in algorithmically relevant subroutines.
Key points
- The protocol deforms a quantum QLDPC code across additional ancillary qubits so that a product of stabilizers measures a desired logical Clifford operator.
- The deformed code remains LDPC and its distance is preserved up to a constant factor independent of the number of physical qubits.
Context and limitations
The framework applies to quantum stabilizer codes and relies on specific ancillary qubit configurations; distance preservation is limited to a constant factor independent of physical qubit count.
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