Mediated Interactions and Damping Effects in Superfluid Mixtures of Bose and Fermi Gases
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| Format: | Preprint |
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2025
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| _version_ | 1866916638473846784 |
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| author | Zheng, Dong-Chen Liao, Yu-Xin Lin, Wen Liao, Renyuan |
| author_facet | Zheng, Dong-Chen Liao, Yu-Xin Lin, Wen Liao, Renyuan |
| contents | We investigate the homogeneous superfluid mixtures of Bardeen-Cooper-Schrieffer~(BCS) superfluid originating from pairing two-species fermionic atoms and superfluidity stemming from condensation of bosonic atoms. By integrating out the freedoms associated with the BCS superfluid, we derive the fermion-mediated interactions between bosons, which is attractive and can be tuned from long range in the BCS region to short range in the region of Bose-Einstein condensation (BEC) of molecular dimers. By analyzing the Bogoliubov spectrum and the damping rate of bosonic superfluid, we map out the phase diagram spanned by the boson-fermion mass ratio and the boson-fermion coupling strength, which consists of a phase separation region and two phase mixing regions with and without Landau damping. The three different phases can coexist at a tricritical point, which moves toward low boson-fermion mass ratio and high boson-fermion scattering length as the fermion-fermion interaction strength is tuned up on the BCS side. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_00471 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Mediated Interactions and Damping Effects in Superfluid Mixtures of Bose and Fermi Gases Zheng, Dong-Chen Liao, Yu-Xin Lin, Wen Liao, Renyuan Quantum Gases Quantum Physics We investigate the homogeneous superfluid mixtures of Bardeen-Cooper-Schrieffer~(BCS) superfluid originating from pairing two-species fermionic atoms and superfluidity stemming from condensation of bosonic atoms. By integrating out the freedoms associated with the BCS superfluid, we derive the fermion-mediated interactions between bosons, which is attractive and can be tuned from long range in the BCS region to short range in the region of Bose-Einstein condensation (BEC) of molecular dimers. By analyzing the Bogoliubov spectrum and the damping rate of bosonic superfluid, we map out the phase diagram spanned by the boson-fermion mass ratio and the boson-fermion coupling strength, which consists of a phase separation region and two phase mixing regions with and without Landau damping. The three different phases can coexist at a tricritical point, which moves toward low boson-fermion mass ratio and high boson-fermion scattering length as the fermion-fermion interaction strength is tuned up on the BCS side. |
| title | Mediated Interactions and Damping Effects in Superfluid Mixtures of Bose and Fermi Gases |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2503.00471 |