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ファイル | 記述 | サイズ | フォーマット | |
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PhysRevB.104.115105.pdf | 2.32 MB | Adobe PDF | 見る/開く |
タイトル: | Direct and ultrafast probing of quantum many-body interactions through coherent two-dimensional spectroscopy: From weak- to strong-interaction regimes |
著者: | Phuc, Nguyen Thanh Trung, Pham Quang |
発行日: | 15-Sep-2021 |
出版者: | American Physical Society (APS) |
誌名: | Physical Review B |
巻: | 104 |
号: | 11 |
論文番号: | 115105 |
抄録: | Interactions between particles in quantum many-body systems play a crucial role in determining the electric, magnetic, optical, and thermal properties of the system. The recent progress in the laser-pulse technique has enabled the manipulations and measurements of physical properties on ultrafast timescales. Here we propose a method for the direct and ultrafast probing of quantum many-body interaction through coherent two-dimensional (2D) spectroscopy. Using a two-band fermionic Hubbard model for the minimum two-site lattice system, we find that the 2D spectrum of a noninteracting system contains only diagonal peaks; the interparticle interaction manifests itself in the emergence of off-diagonal peaks in the 2D spectrum before all the peaks coalesce into a single diagonal peak as the system approaches the strongly interacting limit. The evolution of the 2D spectrum as a function of the time delay between the second and third laser pulses can provide important information on the ultrafast time variation of the interaction. |
著作権等: | ©2021 American Physical Society |
URI: | http://hdl.handle.net/2433/265263 |
DOI(出版社版): | 10.1103/PhysRevB.104.115105 |
出現コレクション: | 学術雑誌掲載論文等 |
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