High-fidelity teleportation of a logical qubit using transversal gates and lattice surgery

• 成果类型: Article
• 署名作者: Ryan-Anderson, C.; Brown, N. C.; Baldwin, C. H.; Dreiling, J. M.; Foltz, C.; Gaebler, J. P.; Gatterman, T. M.; Hewitt, N.; Holliman, C.; Horst, C. V.; Johansen, J.; Lucchetti, D.; Mengle, T.; Matheny, M.; Matsuoka, Y.; Mayer, K.; Mills, M.; Moses, S. A.; Neyenhuis, B.; Pino, J.; Siegfried, P.; Stutz, R. P.; Walker, J.; Hayes, D.
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10379
• DOI: 10.1126/science.adp6016
• 发表日期: 2024-09-20
• 页码: 1327-1331
• 关键词: deterministic quantum teleportation; accuracy threshold; state; CODES

摘要

Quantum state teleportation is commonly used in designs for large-scale quantum computers. Using Quantinuum's H2 trapped-ion quantum processor, we demonstrate fault-tolerant state teleportation circuits for a quantum error correction code-specifically the Steane code. The circuits use up to 30 qubits at the physical level and employ real-time quantum error correction. We conducted experiments on several variations of logical teleportation circuits using both transversal gates and lattice surgery. We measured the logical process fidelity to be 0.975 +/- 0.002 for the transversal teleportation implementation and 0.851 +/- 0.009 for the lattice surgery teleportation implementation as well as 0.989 +/- 0.002 for an implementation of Knill-style quantum error correction.