Inplace Access to the Surface Code Y Basis
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arXiv
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866911831475355648 |
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| author | Gidney, Craig |
| author_facet | Gidney, Craig |
| contents | In this paper, I cut the cost of Y basis measurement and initialization in the surface code by nearly an order of magnitude. Fusing twist defects diagonally across the surface code patch reaches the Y basis in $\lfloor d/2 \rfloor + 2$ rounds, without leaving the bounding box of the patch and without reducing the code distance. I use Monte Carlo sampling to benchmark the performance of the construction under circuit noise, and to analyze the distribution of logical errors. Cheap inplace Y basis measurement reduces the cost of S gates and magic state factories, and unlocks Pauli measurement tomography of surface code qubits on space-limited hardware. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2302_07395 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Inplace Access to the Surface Code Y Basis Gidney, Craig Quantum Physics In this paper, I cut the cost of Y basis measurement and initialization in the surface code by nearly an order of magnitude. Fusing twist defects diagonally across the surface code patch reaches the Y basis in $\lfloor d/2 \rfloor + 2$ rounds, without leaving the bounding box of the patch and without reducing the code distance. I use Monte Carlo sampling to benchmark the performance of the construction under circuit noise, and to analyze the distribution of logical errors. Cheap inplace Y basis measurement reduces the cost of S gates and magic state factories, and unlocks Pauli measurement tomography of surface code qubits on space-limited hardware. |
| title | Inplace Access to the Surface Code Y Basis |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2302.07395 |