コンド共振の凍った電荷の観測

M M Desjardins¹, J J Viennot², M C Dartiailh¹

¹Laboratoire Pierre Aigrain, Ecole Normale Supérieure-PSL Research University, CNRS, Université Pierre et Marie Curie-Sorbonne Universités, Université Paris Diderot-Sorbonne Paris Cité, 24 rue Lhomond, 75231 Paris Cedex 05, France.

Nature

|April 14, 2017

まとめ

研究者は,量子ドット回路におけるコンド効果を,回路量子電動力学を用いて研究した. コロン相互作用によって電荷が凍り付いた時でさえも伝導が可能なことを明らかにした.

科学分野:

凝縮物質物理学
量子情報科学
ナノスケール電子

背景:

量子ドット回路は強い電子的相関を理解する鍵です
コンド効果は凝縮物質の多体現象の代表的な例です
電子状態をナノスケールで制御することは現代の物理学にとって極めて重要です

研究の目的:

電子回路量子力学を用いてコンド効果の内部自由度を調べる
コンドー体制における電子伝送の電荷ダイナミクスを直接測定する.
電子圧縮性を多体系における伝導性から区別する.

主な方法:

量子ドットと高品質の電子レンジを組み合わせる
圧縮性と伝導性の電子測定を同時に行う.
敏感な測定のための回路量子力学アーキテクチャを使用します.

主要な成果:

電子圧縮性は,非常に敏感に測定されました.
コンドー共鳴はマイクロ波光子に透明であることが観察されました.
有限伝導は,クロン相互作用によって凍結された電荷から発生し,自由電子のガス行動と対照的であることが示された.

結論:

二重測定はコンド効果を制御する電荷ダイナミクスを明らかにします.
穴の量子電動学は,多体相関を持つメソスコピック回路に敏感な探査機を提供します.
この研究は,フェルミオンボゾン問題の量子シミュレーションのためのモデルシステムを提供します.

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