トポロジカルな刺激を持つ原子キラル超流体の証拠

Xiao-Qiong Wang^1,2, Guang-Quan Luo^1,2, Jin-Yu Liu^1,2

¹Department of Physics, Southern University of Science and Technology, Shenzhen, China.

Nature

|August 12, 2021

まとめ

トポロジカルな性質を示す新しいタイプの原子超流体を発見しましたこのボース-アインシュタイン凝縮体は光学格子で作られ自発的な渦の順序とグローバルな角運動量を示し新しい量子材料への道を切り開いています

科学分野:

原子,分子,光学物理学
凝縮物質物理学
量子ガス

背景:

トポロジカルな超流動性は,凝縮物質と超冷たい原子ガスにおける重要な概念である.
以前の研究では超伝導体とトポロジック基板をハイブリッド化しました
トポロジカルな超流動性を表す物質は,超流動性3He-Aの発見以来,長年の目標でした.

研究の目的:

グローバル・キラル・アトミック・スーパーフリウイドの証拠を報告する
新しい光学格子における相互作用による時逆の対称性破裂を調べるためだ
ボーゼ-アインシュタインの凝縮物を実現するために現在の限界を超えて

主な方法:

超冷たい87Rb原子を宿すための六角形の化塩基の光学格子を使用した.
原子の動きを測るのに飛行時間とバンドマッピングの測定を用いた.
ボゴリウボフ準粒子刺激のための現象学的効果モデルを開発した.

主要な成果:

ローカル・フェーズと軌道回転の自発的な順序を渦の配列に観察した.
原子格子全体に広がるグローバル・アングラ・モメンタムの出現を証明した
ボゴリウボフ準粒子刺激におけるトポロジカルバンド構造を明らかにした.

結論:

この研究は,原子ボース-アインシュタイン凝縮体における固有のトポロジカルな超流動性の証拠を提供する.
観測された現象は,相互作用によって引き起こされた時間逆転の対称性破裂によって引き起こされる.
このボゾン相は,量子異常のホール効果に関連したユニークな量子現象を示すことが期待されています.

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