Connection of surface code patches based on entanglement distillation without postselection

@misc{mishima2026connection,
  title = {{Connection of surface code patches based on entanglement distillation without postselection}},
  author = {Moeto Mishima and Toshihiko Sasaki and Yasunari Suzuki and Koji Azuma and Masato Koashi},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.06260},
  eprint = {2611.06260},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.06260},
}

TY  - UNPB
TI  - Connection of surface code patches based on entanglement distillation without postselection
AU  - Moeto Mishima
AU  - Toshihiko Sasaki
AU  - Yasunari Suzuki
AU  - Koji Azuma
AU  - Masato Koashi
PY  - 2026
DA  - 2026/11/04
PB  - arXiv
DO  - 10.48550/arxiv.2611.06260
UR  - https://arxiv.org/abs/2611.06260
AB  - Distributed quantum computing is a promising approach for overcoming the scalability limitations of fault-tolerant quantum computing. Entanglement distillation, a process that extracts higher-fidelity entangled states from noisy ones, plays a key role in distributed quantum computing. However, simple distillation protocols typically rely on postselection, which poses practical challenges for implementation. Here, we propose a scheme for distributed surface-code quantum computing that benefits from entanglement distillation even without postselection. Numerical simulations show that the logical error rates in the proposed scheme are lower than those in the setting without distillation. Additionally, we demonstrate that the logical error rates can be suppressed further by exploiting the asymmetry between spacelike and timelike errors in the surface code. The proposed scheme offers a practical and simple approach to distributed quantum computing with surface codes.
ER  -