| 研究課題/領域番号 |
23K03292
|
|---|
| 研究種目 |
基盤研究(C)
|
| 配分区分 | 基金 |
|---|
| 応募区分 | 一般 |
|---|
| 審査区分 |
小区分13020:半導体、光物性および原子物理関連
|
|---|
| 研究機関 | 国立研究開発法人理化学研究所 |
|---|
研究代表者 |
NAIDON PASCAL 国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 専任研究員 (70611979)
|
|---|
| 研究期間 (年度) |
2023-04-01 – 2027-03-31
|
| 研究課題ステータス |
交付 (2023年度)
|
| 配分額 *注記 |
3,380千円 (直接経費: 2,600千円、間接経費: 780千円)
2026年度: 910千円 (直接経費: 700千円、間接経費: 210千円)
2025年度: 910千円 (直接経費: 700千円、間接経費: 210千円)
2024年度: 910千円 (直接経費: 700千円、間接経費: 210千円)
2023年度: 650千円 (直接経費: 500千円、間接経費: 150千円)
|
|---|
| キーワード | Efimov physics / Resonance lifetime / Feshbach resonance / Quantum Defect Theory / polaron / ultracold atoms / Bose-Einstein condensate / Efimov effect |
|---|
| 研究開始時の研究の概要 |
This theoretical project aims at understanding the role of few-body effects (such as the Efimov attraction) in strongly-interacting Bose polarons (impurities strongly coupled to a Bose-Einstein condensate). The theoretical results can be compared with experiments with ultracold atoms.
|
| 研究実績の概要 |
In this fiscal year, the role of the Efimov attraction in strongly interacting polarons was investigated by:
- treating the problem of 2 + 1 particles. The lifetime of three-body resonances in such systems was calculated numerically, revealing that specific mass ratios between the particles make the resonances long lived. These results were published in Few-Body Systems.
- analysing the quantum defect theory of two-body Feshbach resonances enabling the realisation of Efimov states. An important parameter was identified and proposed to be measured experimentally. A manuscript has been submitted.
- treating the problem of Efimov states with dipole interactions. The three-body parameter of these states was predicted analytically and numerically. A manuscript has been submitted.
|
| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The study of Efimov physics has progressed significantly, but the treatment of polarons as originally intended by the truncated basis method has not been fully implemented yet.
|
| 今後の研究の推進方策 |
In the next fiscal year, the use of the truncated basis method will be fully implemented to further investigate the polaronic aspect of the physics.
|
