LSU の物理学者らが室温量子材料を初めて開発 (LSU physicists create first room-temperature quantum material)

2026-07-14 アメリカ合衆国・ルイジアナ州立大学(LSU)

ルイジアナ州立大学(LSU)の研究チームは、**室温で量子状態の識別・輸送が可能な新しい量子材料「量子統計プラズモニック・メタ結晶」**を開発した。金薄膜に集束イオンビームで多数の微細スリットを形成し、それぞれを人工原子(メタ原子)として配置することで、自然界には存在しない結晶構造を人工的に設計した。これにより、極低温を必要とせず、光の量子統計や量子コヒーレンスに応じて異なる量子状態を識別し、別々の経路へ輸送できることを実証した。研究は、量子コンピューター、量子通信、超高感度センシングなどへの応用に加え、光の損失を抑えることで太陽電池の効率向上につながる可能性も示している。

LSU の物理学者らが室温量子材料を初めて開発 (LSU physicists create first room-temperature quantum material)
A new Nature study establishes a blueprint for engineering future quantum materials that operate under everyday conditions.  Credit: LSU Quantum Photonics Group.

<関連情報>

量子統計プラズモンメタ結晶 Quantum statistical plasmonic metacrystals

Chenglong You, Riley B. Dawkins, Jannatul Ferdous, Mohammed Mehedi Hasan, Aadi Singh, Ziang Zhuang, Addison Wilberg, Ian Baum, Benjamin Bertoni, Mingyuan Hong & Omar S. Magaña-Loaiza
Nature  Published:15 July 2026
DOI:https://doi.org/10.1038/s41586-026-10782-3

Abstract

Engineering materials that control quantum many-body dynamics remains challenging, as multiparticle interactions typically produce complex emergent behaviour that is difficult to predict1,2. Here we introduce quantum statistical plasmonic metacrystals, structures in which the multiparticle dynamics mediated by optical near fields produce forbidden quantum statistical bands that enable selective transmission of different types of light. This functionality arises from a plasmonic structure composed of nanoantennas acting as meta-atoms3. Multiphoton fields with statistics within the allowed bands propagate without distortion, whereas fields in forbidden bands are suppressed or driven towards the nearest accessible statistical state. We show that these bands are determined by the geometry and collective arrangement of the meta-atoms, providing a deterministic route to engineering quantum statistical transport. This platform establishes a room-temperature quantum material intrinsically sensitive to the quantum coherence of many-body photonic systems, enabling their robust manipulation and transport4. Our results have implications for coherence-sensitive photonic materials for energy harvesting and scalable many-body quantum technologies2,5.

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