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EnglishRecent experimental advances in ultra-cold Fermi gases allow for exploring response functions under different dynamical conditions. In particular, the issue of obtaining a “quasi-repulsive” regime starting from a Fermi gas with an attractive inter-particle interaction while avoiding the formation of the two-body bound state is currently debated. Here, we provide a calculation of the density and spin response for a wide range of temperature and coupling both in the attractive and quasi-repulsive regime, whereby the system is assumed to evolve non-adiabatically toward the “upper branch” of the Fermi gas. A comparison is made with the available experimental data for these two quantities.
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| Titolo: | Density and spin response of a strongly-interacting Fermi gas in the attractive and quasi-repulsive regime |
| Autori: | |
| Data di pubblicazione: | 2012 |
| Rivista: | |
| Abstract: | Recent experimental advances in ultra-cold Fermi gases allow for exploring response functions under different dynamical conditions. In particular, the issue of obtaining a “quasi-repulsive” regime starting from a Fermi gas with an attractive inter-particle interaction while avoiding the formation of the two-body bound state is currently debated. Here, we provide a calculation of the density and spin response for a wide range of temperature and coupling both in the attractive and quasi-repulsive regime, whereby the system is assumed to evolve non-adiabatically toward the “upper branch” of the Fermi gas. A comparison is made with the available experimental data for these two quantities. |
| Handle: | http://hdl.handle.net/11581/242051 |
| Appare nelle tipologie: | Articolo |
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