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Collective oscillations of a two-component Fermi gas on the repulsive branch
by Tomasz Karpiuk, Piotr T. Grochowski, Mirosław Brewczyk, Kazimierz Rzążewski
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Submission summary
| Authors (as registered SciPost users): | Piotr Grochowski · Kazimierz Rzążewski |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/1908.07771v3 (pdf) |
| Date accepted: | April 9, 2020 |
| Date submitted: | March 31, 2020, 2 a.m. |
| Submitted by: | Piotr Grochowski |
| Submitted to: | SciPost Physics |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
We calculate frequencies of collective oscillations of two-component Fermi gas that is kept on the repulsive branch of its energy spectrum. Not only is a paramagnetic phase explored, but also a ferromagnetically separated one. Both in-, and out-of-phase perturbations are investigated, showing contributions from various gas excitations. Additionally, we compare results coming from both time-dependent Hartree-Fock and density-functional approaches.
List of changes
- We unified the notation, changing the many-body wave function to express the spatial orbitals explicitly.
- We included explicit definitions of quantities we plot in the backgrounds of different panels in Fig. 3.
- We revised Figs. 3-8.
- We removed presumptuous statements in the text.
- We improved the language throughout the text.
- We elaborated on the applicability of hydrodynamics.
- We added a plot in which we directly compare frequency branches in different cases.
- We added a paragraph with details of numerics.
Published as SciPost Phys. 8, 066 (2020)