Geometric scaling of quantum molecules: Pursuit of Efimov physics
Sun, 07/05/2015 - 00:33
|
Title |
Geometric scaling of quantum molecules: Pursuit of Efimov physics |
|
Speaker |
Prof. Cheng Chin(James Franck institute, Enrico Fermi institute and Department of Physics, University of Chicago) |
|
Time |
11:00 a.m., 6th Jul, 2015 |
|
Venue |
Dr. Poe Lecture Hall 浦大邦講堂 |
|
Contact |
Dr. Ying-Cheng Chen(IAMS) |
Abstract:
In 1970, Vitaly Efimov, then a postdoctoral scholar at the USSR Academy of Sciences, attacked a problem deeply rooted in the nucleosynthesis of the first heavy elements in the early Universe — the physics of three resonantly interacting bosons. Efimov's calculation provided a truly fascinating result: the prediction of three-body bound states whose sizes follow a geometric progression 1, l, l2…. Surprisingly, the first observation of Efimov state in 2006 came from ultracold cesium atoms, and was followed by a tremendous wave of interest to exploring their universal scaling properties. We will outline major experimental milestones in this endeavor, as well as our contribution based on a lithium-cesium mixture to confirm the discrete scaling symmetry of the Efimov states.
