Shape of a sound wave in a weakly-perturbed Bose gas
We employ the Gross-Pitaevskii equation to study acoustic emission generated in a uniform Bose gas by a static impurity. The impurity excites a sound-wave packet, which propagates through the gas. We calculate the shape of this wave packet in the limit of long wave lengths, and argue that it is p...
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| Format: | Article |
| Language: | English |
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SciPost
2021-02-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.10.2.025 |