Entangling logical qubits with lattice surgery

Alexander Erhard, Hendrik Poulsen Nautrup, Michael Meth, Lukas Postler, Roman Stricker, Martin Stadler, Valentin Nebendahl, Wenchao Xu, Philip Schindler, Rainer Blatt, Thomas Monz, Nicolai Friis · 2020 · Nature 589, 220-224 (2021)

| 编号 QE087 | 主题 拓扑码 | 链接 arXiv:2006.03071 |

摘要

摘要保留原文（英文）

摘要取自 arXiv / 出版方元数据，未作翻译，以保证与原文一致。

We demonstrate lattice surgery on a quantum computer with seven physical qubits, implemented as qubits in an ion-trap quantum processor. Two logical qubits are encoded in a distance-3 surface code, and we realize a stabilizer measurement between the two logical qubits, and thereby entangle them, using lattice-surgery-type operations. We observe an entanglement fidelity of up to 0.9. Our results demonstrate that lattice surgery, previously only a theoretical construction, can be implemented with current technology, and it paves the way for more complex operations that are necessary for universal quantum computation.

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