Distance-preserving stabilizer measurements in hypergraph product codes
Departments of Physics and Applied Physics, Yale University, New Haven, CT 06520, USA Yale Quantum Institute, Yale University, New Haven, Connecticut 06511, USA
| Published: | 2025-01-30, volume 9, page 1618 |
| Editor: | Tom Gur |
| Eprint: | arXiv:2308.15520v2 |
| Doi: | https://doi.org/10.22331/q-2025-01-30-1618 |
| Citation: | Quantum 9, 1618 (2025). |
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Abstract
Unlike the surface code, quantum low-density parity-check (QLDPC) codes can have a finite encoding rate, potentially lowering the error correction overhead. However, finite-rate QLDPC codes have nonlocal stabilizers, making it difficult to design stabilizer measurement circuits that are low-depth and do not decrease the effective distance. Here, we demonstrate that a popular family of finite-rate QLDPC codes, hypergraph product codes, has the convenient property of distance-robustness: any stabilizer measurement circuit preserves the effective distance. In particular, we prove the depth-optimal circuit in [Tremblay et al, PRL 129, 050504 (2022)] is also optimal in terms of effective distance.

Featured image: Example logical operators in a hypergraph product code.
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