Supersolidity of dipolar Bose-Einstein condensates induced by coupling to fermions
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866929666608070656 |
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| author | Lewkowicz, Maciej Karpiuk, Tomasz Gajda, Mariusz Brewczyk, Mirosław |
| author_facet | Lewkowicz, Maciej Karpiuk, Tomasz Gajda, Mariusz Brewczyk, Mirosław |
| contents | We study a mixture of a repulsive dipolar condensate and a degenerate Fermi gas in a quasi-one-dimensional geometry. We demonstrate that the presence of fermions, which attract bosons, drastically changes the behavior of the dipolar condensate. For strong enough boson-fermion attraction, a dipolar Bose-Fermi droplet appears in the mixture, and as the attraction becomes stronger, a roton excitation develops in the Bogoliubov spectrum, leading to the formation of a supersolid, and eventually a crystal of isolated droplets. We describe the system by coupled extended Gross-Pitaevskii (bosons) and Hartree-Fock (fermions) equations. We study the excitation spectrum of the system and identify a number of Goldstone and Higgs modes in the supersolid regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_05890 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Supersolidity of dipolar Bose-Einstein condensates induced by coupling to fermions Lewkowicz, Maciej Karpiuk, Tomasz Gajda, Mariusz Brewczyk, Mirosław Quantum Gases We study a mixture of a repulsive dipolar condensate and a degenerate Fermi gas in a quasi-one-dimensional geometry. We demonstrate that the presence of fermions, which attract bosons, drastically changes the behavior of the dipolar condensate. For strong enough boson-fermion attraction, a dipolar Bose-Fermi droplet appears in the mixture, and as the attraction becomes stronger, a roton excitation develops in the Bogoliubov spectrum, leading to the formation of a supersolid, and eventually a crystal of isolated droplets. We describe the system by coupled extended Gross-Pitaevskii (bosons) and Hartree-Fock (fermions) equations. We study the excitation spectrum of the system and identify a number of Goldstone and Higgs modes in the supersolid regime. |
| title | Supersolidity of dipolar Bose-Einstein condensates induced by coupling to fermions |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2401.05890 |