Low-lying collective excitations play a fundamental role in understanding quantum many-body systems. The recent realization of ultracold atomic Fermi gases provides a unique setting for investigating various intriguing collective phenomena. In this talk, I will briefly introduce two on-going experimental activities on collective modes of a strongly interacting Fermi gas [1, 2] and the relevant theoretical challenges [3, 4, 5].
1. M. W. Zwierlein, Spin and Mass Transport in Strongly Correlated Fermi Gases; A talk at Bose-Einstein Condensation 2017 - Frontier in Quantum Gases, Sant Feliu de Guixols, Spain, September 5, 2017).
2. T. Peppler et al., Quantum anomaly and thermodynamics of a 2D Fermi gas via collective oscillations; A poster presentation at Bose-Einstein Condensation 2017 - Frontier in Quantum Gases, Sant Feliu de Guixols, Spain, September 2nd-8th, 2017.
3. Peng Zou, Hui Hu, and Xia-Ji Liu, arXiv:1712.08318 (2017).
4. Hui Hu, Peng Zou, and Xia-Ji Liu, Physical Review A 97, 023615 (2018).
5. Umberto Toniolo, Brendan C. Mulkerin, Xia-Ji Liu, and Hui Hu, arXiv:1803.07714.