Precision spectroscopy of cold particles using femto-second optical frequency comb

2018 Fiscal Year Final Research Report

• Project/Area Number: 17H06603
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: The University of Tokyo
• Principal Investigator: Chae Eunmi 東京大学, 大学院工学系研究科(工学部), 助教 (90801332)
• Project Period (FY): 2017-08-25 – 2019-03-31
• Keywords: 精密分光 / 光周波数コム / 冷却原子

Outline of Final Research Achievements

This research utilizes the interaction between light and matter to find a clue for solving inexplicable physical phenomena, such as matter-antimatter asymmetry and dark matter. As a matter, we prepared a cold sample of Cs atoms at around absolute zero temperature by tailoring the magnetic fields and the light. As a light, we employed an optical frequency comb which has various colors of wavelengths with regular spacing and finely determined values. By combining these two elements, we constructed a setup for measuring the wavelengths and the amount of the light absorptions of electrical transitions in Cs atoms. Tests of current physics paradigms will be performed by precisely examining these values.

Free Research Field

物理

Academic Significance and Societal Importance of the Research Achievements

現代物理学の標準模型は電磁気力、弱い相互作用、強い相互作用を統一的に記述しており、実験室で行われている実験結果のすべてを説明できる優れたものである。しかし、物質・反物質の非対称性やダークマターの存在など、標準模型では記述できない現象もある。本研究は標準模型の限界を実験的に見つけることで新しい理論の創出を助け、この世界の理解を深めることを目指している。本研究で用いた最先端の光周波数コムはこの研究に新しい知見を与えられると考えられる。