Description
Speaker:
Prof Junki Kim
Sungkyunkwan University
Abstract:
There has been significant progress in building trapped-ion quantum computers with dozens of ion qubits; however, a clear blueprint for a fully fault-tolerant, large-scale system remains elusive. In this talk, I present a Shuttling-based Distributed Quantum Computing (SDQC) architecture that combines deterministic qubit shuttling with distributed entanglement to interconnect multiple processor nodes while keeping data qubits stationary. Through comprehensive architecture-level modeling with realistic error and timing assumptions, we show that SDQC enables near scale-independent logical clock speeds via aggressive pipelining and achieves competitive logical error rates under fault-tolerant operation compared to conventional QCCD and photonic distributed approaches in large-scale regimes. We further assess application-level performance, including QLDPC problem and Fermi–Hubbard simulations, demonstrating efficient execution in terms of overall runtime and success probability with moderate space–time overhead. These results highlight the critical role of architectural co-design in shaping the scalability and practical performance of future large-scale ion-trap quantum computers.
[1] S. Baek, S.-H. Lee, D. Min, and J. Kim, arXiv:2512.02890