Mediated interactions between ions in quantum degenerate gases
| Autor: | Shanshan Ding, Michael Drewsen, Jan J. Arlt, G. M. Bruun |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Ding, S, Drewsen, M, Arlt, J J & Bruun, G M 2022, ' Mediated interactions between ions in quantum degenerate gases ', Physical Review Letters, vol. 129, no. 15, 153401 . https://doi.org/10.1103/PhysRevLett.129.153401 |
| Popis: | We explore the interaction between two trapped ions mediated by a surrounding quantum degenerate Bose or Fermi gas. Using perturbation theory valid for weak atom-ion interaction, we show analytically that the interaction mediated by a Bose gas has a power-law behaviour for large distances whereas it has a Yukawa form for intermediate distances. For a Fermi gas, the mediated interaction is given by a power-law for large density and by a Ruderman-Kittel-Kasuya-Yosida form for low density. For strong atom-ion interactions, we use a diagrammatic theory to demonstrate that the mediated interaction can be a significant addition to the bare Coulomb interaction between the ions, when an atom-ion bound state is close to threshold. Finally, we show that the induced interaction leads to substantial and observable shifts in the ion phonon frequencies. main text: 5 pages, 4 figures. Supplemental materials: 6 pages, 5 figures |
| Databáze: | OpenAIRE |
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