Construction of molecular qubit assemblies with nanospaces

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K19051
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 34:Inorganic/coordination chemistry, analytical chemistry, and related fields
• Research Institution: Kyushu University
• Principal Investigator: Yanai Nobuhiro 九州大学, 工学研究院, 准教授 (90649740)
• Project Period (FY): 2022-06-30 – 2024-03-31
• Keywords: 量子センシング / 量子ビット / 光励起状態 / 多孔性金属錯体

Outline of Final Research Achievements

The European robin, a migratory bird, is thought to be able to sense the geomagnetic field by using a quantum coherence state. Inspired by the quantum sensors in nature that function at room temperature and in a heterogeneous environment, we aim to construct molecular materials that can sense a variety of external environments at around room temperature, and have succeeded in constructing porous metal-organic frameworks (MOFs) with a dense accumulation of molecular qubits. Various molecular qubits - doublets, triplets and quintuplets - were generated in MOFs, and their quantum coherence was observed, and furthermore, their coherence time was found to respond to molecular adsorption, providing important insights into the realization of chemical quantum sensing.

Free Research Field

光機能性材料

Academic Significance and Societal Importance of the Research Achievements

第二次量子革命が起こる中、多様な量子技術の開発が行われている。中でも本研究では量子特有の性質を用いたセンシング技術の開発に取り組んだ。ナノレベルの細孔を有する多孔性金属錯体中に分子性の量子ビットを組み込むことで、室温においてもセンシングに活用できるほど長い量子コヒーレンス時間を維持し、細孔中に取り込んだ小分子への応答を達成し、今後の高感度な量子センサーの実現に向け重要な知見が得られた。