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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.09567 |
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| _version_ | 1866908751610511360 |
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| author | Guo, Yin-Da Zhou, Kai-Dong Bao, Shou-Shan Zhang, Hong |
| author_facet | Guo, Yin-Da Zhou, Kai-Dong Bao, Shou-Shan Zhang, Hong |
| contents | Superradiance enables scalar fields to extract energy and angular momentum from a rotating black hole (BH), leading to the formation of a BH-condensate system. Previous studies mainly focus on the phase velocity, which propagates in the azimuthal direction. In this work, we show that the superradiant scalar condensate presents a nontrivial group velocity distribution. In the region sufficiently far from the BH, the condensate exhibits a radial velocity magnitude that approaches $ (r_gμ/2) \sin (2ωt-2 φ)$, while the polar and azimuthal velocity magnitudes asymptotically decline as $\propto 1/r$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_09567 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Local Group Velocity Distribution inside Superradiant Condensates Guo, Yin-Da Zhou, Kai-Dong Bao, Shou-Shan Zhang, Hong General Relativity and Quantum Cosmology Superradiance enables scalar fields to extract energy and angular momentum from a rotating black hole (BH), leading to the formation of a BH-condensate system. Previous studies mainly focus on the phase velocity, which propagates in the azimuthal direction. In this work, we show that the superradiant scalar condensate presents a nontrivial group velocity distribution. In the region sufficiently far from the BH, the condensate exhibits a radial velocity magnitude that approaches $ (r_gμ/2) \sin (2ωt-2 φ)$, while the polar and azimuthal velocity magnitudes asymptotically decline as $\propto 1/r$. |
| title | Local Group Velocity Distribution inside Superradiant Condensates |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2508.09567 |