Ultracold Atomic Fermi Gases in the Strongly Interacting Regime
Professor Hui Hu
Swinburne University of Technology, Melbourne
3:30 pm Friday, 17 April 2009, EN101
(Ground Floor, EN Building), Hawthorn.
Interactions make life
diverse and interesting. Interacting quantum gases are underlying
the fundamental features of our life at the 'quantum scale"
of extremely small sizes and low temperatures. Most of the features
can be understood using the weak coupling 'mean-field' theory. However,
recent experimental achievements of Feshbach resonances in ultracold
Fermi gases, such as the one realized in the Swinburne CAOUS centre,
usher in a new era of strong interactions that can hardly be understood
from the simple 'mean-field' picture.
In this talk, I will introduce the concept of the
so-called 'BCS-BEC crossover' for strongly interacting ultracold
Fermi gases and discuss our recent theoretical developments of strong-coupling
theories. Specific attention will be given to intriguing phenomena
that uniquely occur in the strongly interacting regime, such as
the universal thermodynamic behaviour and the two-fluid hydrodynamic
collective modes. The key theoretical difficulty will be addressed,
along with some open questions.
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