Description
Speaker:
Prof Taehyun Kim
Seoul National University
Abstract:
Trapped-ion systems are among the leading platforms for quantum computing because of their long coherence times, high-fidelity operations, and flexible qubit connectivity. Realizing scalable quantum processors, however, requires progress not only in qubit control but also in trap-chip fabrication, system integration, integrated photonics, and modular networking. In this talk, I will present our recent efforts toward a scalable trapped-ion quantum computing platform built on microfabricated surface traps, multi-qubit control, and photonic technologies.
I will first discuss progress in MEMS-based surface-ion-trap chips, including our studies of photoinduced charging in semiconductor-based traps and fabrication strategies developed to suppress laser-induced electric-field noise while supporting large ion chains and elementary shuttling operations. I will then describe the development of a 5-qubit trapped-ion system with arbitrary individual qubit control, together with RFSoC-based electronics aimed at more compact and scalable system integration. Finally, I will discuss two photonics-related directions for scaling: the development of integrated photonic components for surface-ion-trap chips, and quantum networking capabilities based on ion-photon interfaces, remote entanglement, and quantum frequency conversion. Together, these efforts outline a path from robust trapped-ion processors to modular and distributed quantum computing architectures.