2025-04-02 日本原子力研究開発機構,電気通信大学,量子科学技術研究開発機構,千葉大学
図１：磁場中で試料を回転していない場合は1本の信号(a)が、磁場と垂直方向に試料を回転すると信号が分裂しさらに2つの信号が現れる。
＜関連情報＞
- https://www.jaea.go.jp/02/press2025/p25040201/
- https://journals.aps.org/prl/accepted/4307bYeaF7915592a12170a55688c89b954745b88
核スピン状態の力学的多重化 Mechanical multiplexer of nuclear spin states
Hiroyuki Chudo, Naoto Yokoi, Mamoru Matsuo, Kazuya Harii, Jun Suzuki, Masaki Imai, Masahiro Sato, Sadamichi Maekawa, and Eiji Saitoh
Physical Review Letters Accepted: 10 February, 2025
Abstract
A spin-1/2 is the simplest system that has been believed to support a single two-level quantum system, represented by a single resonance. We experimentally demonstrate that a spin-1/2 nucleus of 19F in C6F6 exhibits an extra resonance corresponding to the emergence of the states, by mechanically} rotating a sample and a coil in nuclear magnetic resonance (NMR) measurements. On the basis of the Floquet formalism, we identify the emergence of the extra two-level state due to the temporal periodicity generated by the mechanical rotation (mechanical spin multiplexing) and derive an operator algebra analogous to the planar rotor algebra in an effective description of the system. The observed multiplexing allows a single spin-1/2 to carry more than two states, and potentially enabling the processing of multiple quantum bits on a single spin.
