SPECTROSCOPY ON EXTREMELY WEAKLY-BOUND MOLECULES: COOPER PAIRS AND EFIMOV TRIMERS

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2007

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Ohio State University

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Recent research on ultracold atoms and molecules entered an exciting era in which atomic and molecular interactions can be fully controlled and engineered to simulate a broad range of few- and many-body phenomena in condensed matter, molecular physics and even nuclear physics. In this talk I will present two examples. The first example is degenerate Fermi gas with resonant interactions. Our studies of Fermion pairs from precision radio-frequency spectroscopy provide new views on many-body pairing and phase transitions in strongly interacting Fermi systems} \underline{\textbf305}, 1128 (2004)}. This work was ranked one of the top 10 science breakthroughs in year 2004 by Science magazine. The second one is the observation of a three-body Efimov state, which was conjectured in 1970 by a Russian physicist V. Efimov in the context of nuclear physics. Efimov trimers exist in general Bose systems when the binary interaction is resonantly enhanced. The observation of an Efimov state} \underline{\textbf440}, 315 (2006)} opens up new horizon to explore few-body physics in the quantum degeneracy regime} \underline{\textbf94}, 123201 (2005).}.

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Author Institution: The James Franck institute and the Department of Physics, University of Chicago, Chicago, IL, 60637

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