Asymptotically Good Quantum Codes with Addressable Transversal T Gates

Abstract:Designing quantum codes with both transversal non-Clifford gates and good error-correcting parameters is an important goal in fault-tolerant quantum computation. Here, we construct an explicit family of binary CSS codes with constant rate and linear distance that admit fully addressable transversal $T$ gates. Specifically, any prescribed tensor product of logical powers of $T$ is implemented by a tensor product of physical powers of $T$, without any subsequent correction. Our construction combines algebraic-geometry codes with suitable binary embedding to obtain generalized divisibility of binary codes. This divisibility then enables fully addressable transversal $T$ gates. Furthermore, we formulate the minimum binary embedding length problem as a minimum-weight problem over an affine space and numerically improve the constants in the asymptotic rate and relative-distance bounds.

27 pages, no figures. Comments are welcome

arXiv:2609.35129 [quant-ph]

(or arXiv:2609.35129v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2609.35129 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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