Pengjun Wang, Zhengkun Fu, Lianghui Huang, Jing Zhang
We report the experiment on probing the one-body spectral function in a trapped non-interacting $^{40}$K Fermi gas by means of the momentum-resolved Raman spectroscopy The experimental result is in good agreement with the expected quadratic dispersion in the non-interacting regime. Through the comparison with the radio-frequency spectrum, we found that the Raman spectrum shows some new characteristics.
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http://arxiv.org/abs/1205.1110
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