Deterministic atom-shuttle interconnects via ultrafast atom-ion entangling gate

• URL: http://arxiv.org/abs/2607.15597v1
• Date: Fri, 17 Jul 2026 03:45:34 GMT
• Title: Deterministic atom-shuttle interconnects via ultrafast atom-ion entangling gate
• Abstract summary: We propose a controlled-$Z$ gate between a Rydberg-excited atom and a trapped ion.<n>Toggling the Rydberg state extends the scheme to multi-ion crystals at negligible overhead.<n>We find that the hybrid architecture supports orders of magnitude more operations than atom-only or ion-only architectures at fixed code distance and logical error rate.
• Score: 0.8361990291694322
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Neutral-atom arrays and trapped-ion crystals offer complementary strengths for fault-tolerant quantum computing but lack a fast way to deterministically interact. Here we propose a controlled-$Z$ gate generated by the charge-induced-dipole ($C_4$) force between a Rydberg-excited atom and a trapped ion, balanced by a spin-dependent optical Magnus force on the ion that closes phase-space trajectories within a few microseconds. Toggling the Rydberg state extends the scheme to multi-ion crystals at negligible overhead. The resulting ${\sim}5\,$kHz atom shuttle accelerates short-distance QCCD links and enables hybrid qLDPC memories in which atom logical qubits are written onto an ion block treated as a passive storage zone. We perform circuit-level Monte Carlo simulations and find that the hybrid architecture supports orders of magnitude more operations than atom-only or ion-only architectures at fixed code distance and logical error rate.

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