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The 343rd forum: Fermion mediated interactions between ultracold bosonic atoms

Date: 2018-08-27
Time: 10:00
Venue: 中科院物理研究所M楼253报告厅
Speaker: Prof. Cheng Chin

James Franck Institute, Enrico Fermi Institute, Department of Physics, University of Chicago


Prof. Chin obtained his Ph.D in Physics from Stanford University (Adviser: Steven Chu).He is a professor at the University of Chicago, working for the Department of Physics as well as the Enrico Fermi Institute and the James Franck Institute.

Prof. Chin is a very active scientist. He has given many invited talks in international conferences and organized or co-organized many conferences. He has published numerous papers, and is a Thomson Reuters Highly Cited Researcher.

Prof. Chin has received many awards for his scientific achievements, including the I.I. Rabi Prize and the Bose-Einstein condensation award. He was elected as an American Physical Society Fellow in 2014.


Understanding of long-range interactions. For example, the exchange of massive bosons leads to the Yukawa potential. Phonon exchange between electrons gives rise to Cooper pairing in superconductors. When a Bose-Einstein condensate (BEC) of Cs is embedded in a degenerate Fermi gas of Li, we show that interspecies interactions can give rise to an effective trapping potential, damping, and attractive boson-boson interactions mediated by fermions. The latter, related to the Ruderman-Kittel-Kasuya-Yosida (RKKY) mechanism, results from a coherent three-body scattering process. Such mediated interactions are expected to form novel magnetic phases and supersolids. We show that for suitable conditions, the mediated interactions can convert a stable BEC into a train of "Bose-Fermi solitons".

邀 请 人:刘伍明(电话:8264 9249)

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