Engineering quantum droplet formation by cavity-induced long-range interactions
| Autor: | Mixa, Leon, Radonjić, Milan, Pelster, Axel, Thorwart, Michael |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We investigate a dilute Bose gas with both a short-range contact and an effective long-range interaction between the atoms. The latter is induced by the strong coupling to a cavity light mode and is spatially characterized by a periodic signature and a tunable envelope rooted in the pumping of the cavity. We formulate a Bogoliubov theory which is based on a homogeneous mean-field description and quantum fluctuations around it. We find that the repulsive mean-field contact interaction could be destabilized by quantum fluctuation corrections rooting in the long-range interaction. The competition between both allows for the formation of self-bound quantum droplets. This generic approach is applied to two cavity setups without and with a momentum-conserving effective long-range interaction between the atoms in the form of a driven dispersive cavity mode and a multimode cavity, respectively. For both cases we show analytically how the size and the central density of the cavity-induced quantum droplets depend on the contact interaction strength and on the shape of the spatial envelope of the long-range interaction. Comment: 16 pages, 8 figures |
| Databáze: | arXiv |
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