The Rayleigh-Taylor instability in a binary quantum fluid
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866918134584180736 |
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| author | Geng, Yanda Tao, Junheng Zhao, Mingshu Mukherjee, Shouvik Eckel, Stephen Campbell, Gretchen K. Spielman, Ian B. |
| author_facet | Geng, Yanda Tao, Junheng Zhao, Mingshu Mukherjee, Shouvik Eckel, Stephen Campbell, Gretchen K. Spielman, Ian B. |
| contents | Instabilities, where small fluctuations seed the formation of large-scale structures, govern dynamics in a variety of fluid systems. The Rayleigh-Taylor instability (RTI), present from tabletop to astronomical scales, is an iconic example characterized by mushroom-shaped incursions appearing when immiscible fluids are forced together. Despite its ubiquity, RTI experiments are challenging; here, we report the observation of the RTI in an immiscible binary superfluid consisting of a two-component Bose-Einstein condensate. We force these components together to initiate the instability, and observe the growth of mushroom-like structures. The interface can also be stabilized, allowing us to spectroscopically measure the "ripplon" interface modes. Lastly, we use matter-wave interferometry to transform the superfluid velocity field at the interface into a vortex chain. These results-in agreement with our theory-demonstrate the close connection between the RTI in classical and quantum fluids. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_19807 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Rayleigh-Taylor instability in a binary quantum fluid Geng, Yanda Tao, Junheng Zhao, Mingshu Mukherjee, Shouvik Eckel, Stephen Campbell, Gretchen K. Spielman, Ian B. Quantum Gases Atomic Physics Instabilities, where small fluctuations seed the formation of large-scale structures, govern dynamics in a variety of fluid systems. The Rayleigh-Taylor instability (RTI), present from tabletop to astronomical scales, is an iconic example characterized by mushroom-shaped incursions appearing when immiscible fluids are forced together. Despite its ubiquity, RTI experiments are challenging; here, we report the observation of the RTI in an immiscible binary superfluid consisting of a two-component Bose-Einstein condensate. We force these components together to initiate the instability, and observe the growth of mushroom-like structures. The interface can also be stabilized, allowing us to spectroscopically measure the "ripplon" interface modes. Lastly, we use matter-wave interferometry to transform the superfluid velocity field at the interface into a vortex chain. These results-in agreement with our theory-demonstrate the close connection between the RTI in classical and quantum fluids. |
| title | The Rayleigh-Taylor instability in a binary quantum fluid |
| topic | Quantum Gases Atomic Physics |
| url | https://arxiv.org/abs/2411.19807 |