Superradiant phononic emission from the analog spin ergoregion in a two-component Bose–Einstein condensate
We make use of an analog gravity perspective to obtain a physical understanding of hydrodynamic instabilities stemming from the presence of quantized vortices in two-component atomic condensates and of their relation to ergoregion instabilities of rotating massive objects in gravitation. In addition...
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Académie des sciences
2023-07-01
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| Series: | Comptes Rendus. Physique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.145/ |
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| author | Berti, Anna Giacomelli, Luca Carusotto, Iacopo |
| author_facet | Berti, Anna Giacomelli, Luca Carusotto, Iacopo |
| author_sort | Berti, Anna |
| collection | DOAJ |
| description | We make use of an analog gravity perspective to obtain a physical understanding of hydrodynamic instabilities stemming from the presence of quantized vortices in two-component atomic condensates and of their relation to ergoregion instabilities of rotating massive objects in gravitation. In addition to the localized instabilities related to vortex splitting, configurations displaying dynamically unstable modes that extend well outside the vortex core are found. In this case, the superradiant scattering process involves phonon emission into the much wider ergoregion of spin modes, so the physics most closely resembles the one of rotating massive objects. Our results confirm the potential of two-component condensates as analog models of rotating space-times in different regimes of gravitational interest. |
| format | Article |
| id | doaj-art-735e74a22d9a4bd3a88c879ac83bbaf4 |
| institution | Kabale University |
| issn | 1878-1535 |
| language | English |
| publishDate | 2023-07-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Physique |
| spelling | doaj-art-735e74a22d9a4bd3a88c879ac83bbaf42025-02-07T13:53:11ZengAcadémie des sciencesComptes Rendus. Physique1878-15352023-07-0124S311313210.5802/crphys.14510.5802/crphys.145Superradiant phononic emission from the analog spin ergoregion in a two-component Bose–Einstein condensateBerti, Anna0Giacomelli, Luca1Carusotto, Iacopo2Pitaevskii BEC Center, CNR-INO and Dipartimento di Fisica, Università di Trento, I-38123 Trento, ItalyPitaevskii BEC Center, CNR-INO and Dipartimento di Fisica, Università di Trento, I-38123 Trento, Italy; Université Paris Cité, CNRS, Matériaux et Phénomènes Quantiques, F-75013 Paris, FrancePitaevskii BEC Center, CNR-INO and Dipartimento di Fisica, Università di Trento, I-38123 Trento, ItalyWe make use of an analog gravity perspective to obtain a physical understanding of hydrodynamic instabilities stemming from the presence of quantized vortices in two-component atomic condensates and of their relation to ergoregion instabilities of rotating massive objects in gravitation. In addition to the localized instabilities related to vortex splitting, configurations displaying dynamically unstable modes that extend well outside the vortex core are found. In this case, the superradiant scattering process involves phonon emission into the much wider ergoregion of spin modes, so the physics most closely resembles the one of rotating massive objects. Our results confirm the potential of two-component condensates as analog models of rotating space-times in different regimes of gravitational interest.https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.145/Analog gravitysuperradianceergoregion instabilityvorticestwo component Bose–Einstein condensates |
| spellingShingle | Berti, Anna Giacomelli, Luca Carusotto, Iacopo Superradiant phononic emission from the analog spin ergoregion in a two-component Bose–Einstein condensate Comptes Rendus. Physique Analog gravity superradiance ergoregion instability vortices two component Bose–Einstein condensates |
| title | Superradiant phononic emission from the analog spin ergoregion in a two-component Bose–Einstein condensate |
| title_full | Superradiant phononic emission from the analog spin ergoregion in a two-component Bose–Einstein condensate |
| title_fullStr | Superradiant phononic emission from the analog spin ergoregion in a two-component Bose–Einstein condensate |
| title_full_unstemmed | Superradiant phononic emission from the analog spin ergoregion in a two-component Bose–Einstein condensate |
| title_short | Superradiant phononic emission from the analog spin ergoregion in a two-component Bose–Einstein condensate |
| title_sort | superradiant phononic emission from the analog spin ergoregion in a two component bose einstein condensate |
| topic | Analog gravity superradiance ergoregion instability vortices two component Bose–Einstein condensates |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.145/ |
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