Universal van der Waals force between heavy polarons in superfluids
We investigate the long-range behavior of the induced Casimir interaction between two spinless heavy impurities, or polarons, in superfluid cold atomic gases. With the help of effective field theory (EFT) of a Galilean invariant superfluid, we show that the induced impurity-impurity potential at lon...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
13 Jun 2022
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| In: |
Arxiv
Year: 2022, Pages: 1-10 |
| DOI: | 10.48550/arXiv.2206.01048 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.48550/arXiv.2206.01048 Verlag, lizenzpflichtig, Volltext: http://arxiv.org/abs/2206.01048 
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| Verfasserangaben: | Keisuke Fujii, Masaru Hongo, and Tilman Enss |
| Zusammenfassung: | We investigate the long-range behavior of the induced Casimir interaction between two spinless heavy impurities, or polarons, in superfluid cold atomic gases. With the help of effective field theory (EFT) of a Galilean invariant superfluid, we show that the induced impurity-impurity potential at long distance universally shows a relativistic van der Waals-like attraction ($\sim 1/r^7$) resulting from the exchange of two superfluid phonons. We also clarify finite temperature effects from the same two-phonon exchange process. The temperature $T$ introduces the additional length scale $c_s/T$ with the speed of sound $c_s$. Leading corrections at finite temperature scale as $T^6/r$ for distances |
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| Beschreibung: | Gesehen am 15.09.2022 |
| Beschreibung: | Online Resource |
| DOI: | 10.48550/arXiv.2206.01048 |