Condensate Dark Stars beyond the Mean-Field Approximation: The Lee-Huang-Yang correction
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866917330815025152 |
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| author | Panotopoulos, Grigoris |
| author_facet | Panotopoulos, Grigoris |
| contents | We study structural properties of self-gravitating fluid spheres made of a dilute, homogeneous and ultracold Bose gas assuming repulsive, short-range interactions. For the first time we include the Lee-Huang-Yang correction to the usual polytropic equation-of-state of index $n=1$, which goes beyond the Hartree mean-field approximation taking into account quantum fluctuations. We find that the correction has a considerable impact on the M-R relationships and other properties of condensate dark stars, such as factor of compactness and tidal Love numbers. The impact is more significant for equation-of-states that support larger highest stellar masses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_05506 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Condensate Dark Stars beyond the Mean-Field Approximation: The Lee-Huang-Yang correction Panotopoulos, Grigoris General Relativity and Quantum Cosmology Solar and Stellar Astrophysics We study structural properties of self-gravitating fluid spheres made of a dilute, homogeneous and ultracold Bose gas assuming repulsive, short-range interactions. For the first time we include the Lee-Huang-Yang correction to the usual polytropic equation-of-state of index $n=1$, which goes beyond the Hartree mean-field approximation taking into account quantum fluctuations. We find that the correction has a considerable impact on the M-R relationships and other properties of condensate dark stars, such as factor of compactness and tidal Love numbers. The impact is more significant for equation-of-states that support larger highest stellar masses. |
| title | Condensate Dark Stars beyond the Mean-Field Approximation: The Lee-Huang-Yang correction |
| topic | General Relativity and Quantum Cosmology Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2601.05506 |