2026-02-19 チャルマース工科大学
In the pursuit of powerful and stable quantum computers, researchers at Chalmers University of Technology, Sweden, have developed the theory for an entirely new quantum system – based on the novel concept of ‘giant superatoms’. This breakthrough enables quantum information to be protected, controlled, and distributed in new ways and could be a key step towards building quantum computers at scale.
＜関連情報＞
- https://news.cision.com/chalmers/r/giant-superatoms–unlock-a-new-toolbox-for-quantum-computers,c4309525
- https://journals.aps.org/prl/abstract/10.1103/crzs-k718
巨大超原子におけるドレスド干渉：エンタングルメントの生成と転送 Dressed Interference in Giant Superatoms: Entanglement Generation and Transfer
Lei Du, Xin Wang, Anton Frisk Kockum, and Janine Splettstoesser
Physical Review Letters Published: 25 November, 2025
DOI: https://doi.org/10.1103/crzs-k718
Abstract
We introduce the concept of giant superatoms (GSAs), where two or more interacting atoms are nonlocally coupled to a waveguide through one of them, and explore their unconventional quantum dynamics. For braided GSAs, this setup enables decoherence-free transfer and swapping of their internal entangled states. For separate GSAs, engineering coupling phases leads to state-dependent chiral emission, which enables selective, directional quantum information transfer. This mechanism further facilitates remote generation of -class entangled states. Our results thereby open exciting possibilities for quantum networks and quantum information processing.
