第666回レーザー科学研究所コロキウム

●日時(Date):
2026年8月26日 (水) 14:00 – 16:00

○場所(Place):
レーザー科学研究所実験棟3階実験統括室
オンライン配信: MS-TEAMS
Join: https://teams.microsoft.com/meet/431985763571581?p=WpH1ToDTFBLxbEtUcQ
Meeting ID: 431 985 763 571 581
Passcode: a2RY7Kg7

●講演者(Speaker):
碁盤晃久 (NanoQT CTO)

○題目(Title):
ナノファイバー共振器を用いた量子インターコネクトの開発―分散型量子計算に向けて―
Quantum Interconnect Based on Nanofiber Cavities Toward Distributed Quantum Computing

●概要(Abstract):
Quantum computers may enable the simulation of complex quantum systems and the solution of problems beyond the reach of conventional computers. Building a large-scale quantum computer, however, requires controlling many qubits with extremely high precision. Rather than placing all of them in a single device, a promising alternative is to connect several smaller quantum processors so that they operate as one larger system. The central challenge is to transfer quantum information between processors with high fidelity and high rate. Photons are natural carriers for this purpose because they can travel through optical fibers with low loss. To realize such photonic links, at NanoQT we are developing quantum interconnect using ytterbium atoms trapped in optical tweezer arrays and coupled to telecom-band nanofiber cavities [1]. Our specially designed nanofiber cavities enhance atom–photon interactions while providing direct compatibility with optical-fiber networks [2]. In this talk, I will introduce the underlying principles of cavity-assisted entanglement generation between remote qubits [3], describe a system architecture that supports scalable, error-corrected quantum computing [4], and discuss our recent hardware progress.

[1] S. Sunami et al., PRX Quantum 6, 010101 (2025).
[2] S. Horikawa et al., Opt. Lett. 50, 5294 (2025).
[3] S. Kikura et al., PRX Quantum 6, 040351 (2025).
[4] S. Sunami et al., PRX Quantum 7, 033014 (2026).

○連絡先(Contact Person):
藤岡慎介 fujioka.shinsuke.ile@osaka-u.ac.jp