Observation of pattern stabilization in a driven superfluid
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866912222725275648 |
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| author | Liebster, Nikolas Sparn, Marius Kath, Elinor Duchene, Jelte Fujii, Keisuke Görlitz, Sarah L. Enss, Tilman Strobel, Helmut Oberthaler, Markus K. |
| author_facet | Liebster, Nikolas Sparn, Marius Kath, Elinor Duchene, Jelte Fujii, Keisuke Görlitz, Sarah L. Enss, Tilman Strobel, Helmut Oberthaler, Markus K. |
| contents | The formation of patterns in driven systems has been studied extensively, and their emergence can be connected to a fine balance of instabilities and stabilization mechanisms. While the early phase of pattern formation can be understood on the basis of linear stability analyses, the long-time dynamics can only be described by accounting for the interactions between the excitations generated by the drive. Here, we observe the stabilization of square patterns in an interaction-driven, two-dimensional Bose-Einstein condensate. These patterns emerge due to inherent high-order processes that become relevant in the regime of large phonon occupations. Theoretically, this can be understood as the emergence of a stable fixed point of coupled nonlinear amplitude equations, which include phonon-phonon interactions. We experimentally probe the predicted flows towards such a stable fixed-point, as well as repulsion from a saddle fixed-point, using the experimental control unique to quantum gases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_03792 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observation of pattern stabilization in a driven superfluid Liebster, Nikolas Sparn, Marius Kath, Elinor Duchene, Jelte Fujii, Keisuke Görlitz, Sarah L. Enss, Tilman Strobel, Helmut Oberthaler, Markus K. Quantum Gases Pattern Formation and Solitons Quantum Physics The formation of patterns in driven systems has been studied extensively, and their emergence can be connected to a fine balance of instabilities and stabilization mechanisms. While the early phase of pattern formation can be understood on the basis of linear stability analyses, the long-time dynamics can only be described by accounting for the interactions between the excitations generated by the drive. Here, we observe the stabilization of square patterns in an interaction-driven, two-dimensional Bose-Einstein condensate. These patterns emerge due to inherent high-order processes that become relevant in the regime of large phonon occupations. Theoretically, this can be understood as the emergence of a stable fixed point of coupled nonlinear amplitude equations, which include phonon-phonon interactions. We experimentally probe the predicted flows towards such a stable fixed-point, as well as repulsion from a saddle fixed-point, using the experimental control unique to quantum gases. |
| title | Observation of pattern stabilization in a driven superfluid |
| topic | Quantum Gases Pattern Formation and Solitons Quantum Physics |
| url | https://arxiv.org/abs/2309.03792 |