一、报告题目

Cold heavy molecules:photoassociation of Yb and microwave lens for PbO
二、报告人

Dr. Katsunari Enomoto

日本富山大学 副教授

三、邀请人

孙振东 教授

四、报告时间

2018年9月27日16:40

五、报告地点

知新楼C702 量子报告厅

六、报告内容

Cold molecules in the gaseous phase are promising systems for novel spectroscopy, precision measurements for high-energy physics, and cold collision studies. In this talk, two topics regarding cold molecules will be presented: photoassociation (PA) spectroscopy of ultracold Yb atoms and control of translational motion of cold PbO beams.

PA spectroscopy of ultracold atoms is a powerful tool to investigate vibrational levels near the dissociation limit of a dimer. The scattering length, which determines the ultracold collision crosssection, can be deduced from the PA spectroscopy data. We have precisely determined the scattering lengths for all combinations of Yb isotopes by performing two-color PA spectroscopy. Some other results of PA studies of Yb atoms, such as a purely long-range state due to the hyperfine interaction and an optical Feshbach resonance, will also be presented.

To cool and trap various kinds of molecules, it is needed to develop methods to directly cool the molecules and to control the translational motion. We have proposed a molecular beam focuser and decelerator using a superconducting microwave resonator. We have made such a superconducting resonator by electroplating a Pb/Sn alloy on cylindrical copper resonator, and have confirmed that a strong microwave electric field of about 10 kV/cm can be obtained. Recently, we have successfully demonstrated the focusing of cold PbO beams using the superconducting resonator.

七、报告人简历

2004年京都大学获得理学博士学位；2004-2007京都大学和哈佛大学博士后；2007-2010富山大学物理系助教授；2010-现在，富山大学物理系副教授；2012年获日本物理学会青年科学家奖。