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PreprintarXiv licencearXiv

The Dynamical Instability of Rotating Boson Stars

  • Kai-Dong Zhou
  • Shou-Shan Bao
  • Jian Deng
  • Hong Zhang
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Abstract

We investigate the dynamical instability of rotating boson stars described by the Gross--Pitaevskii--Poisson equations with contact self-interactions. Through three-dimensional simulations, we confirm that the rotating boson star undergoes a quasiperiodic conversion between ring-like and twin-star-like density configurations in the early nonlinear stage. We develop a systematic linear stability analysis to identify the modes driving this instability and show that repulsive self-interactions could significantly increase the lifetime of the rotating boson stars. We further construct a three-mode Hamiltonian to describe the early nonlinear stage, which explains the quasiperiodic conversion. This analytical framework agrees reasonably well with the simulation results and provides a clear picture to understand the dynamics of rotating boson stars.

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Cite

BibTeXRIS
BibTeX
@misc{zhou2026dynamical,
  title = {{The Dynamical Instability of Rotating Boson Stars}},
  author = {Kai-Dong Zhou and Shou-Shan Bao and Jian Deng and Hong Zhang},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.06954},
  eprint = {2609.06954},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.06954},
}
RIS
TY  - UNPB
TI  - The Dynamical Instability of Rotating Boson Stars
AU  - Kai-Dong Zhou
AU  - Shou-Shan Bao
AU  - Jian Deng
AU  - Hong Zhang
PY  - 2026
DA  - 2026/09/07
PB  - arXiv
DO  - 10.48550/arxiv.2609.06954
UR  - https://arxiv.org/abs/2609.06954
AB  - We investigate the dynamical instability of rotating boson stars described by the Gross--Pitaevskii--Poisson equations with contact self-interactions. Through three-dimensional simulations, we confirm that the rotating boson star undergoes a quasiperiodic conversion between ring-like and twin-star-like density configurations in the early nonlinear stage. We develop a systematic linear stability analysis to identify the modes driving this instability and show that repulsive self-interactions could significantly increase the lifetime of the rotating boson stars. We further construct a three-mode Hamiltonian to describe the early nonlinear stage, which explains the quasiperiodic conversion. This analytical framework agrees reasonably well with the simulation results and provides a clear picture to understand the dynamics of rotating boson stars.
ER  -