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• W4324100413 abstract "Soliton in the hostile turbulent wave dark matter ($mathrm{ensuremath{Psi}}mathrm{DM}$) halo of a galaxy agitates with various kinds of excitation, and the soliton even breathes heavily under great stress. A theory of collective excitation for a $mathrm{ensuremath{Psi}}mathrm{DM}$ soliton is presented. The collective excitation has different degrees of coupling to negative energy modes, where lower-order excitation generally necessitates more negative energy coupling. A constrained variational principle is developed to assess the frequencies and mode structures of small-amplitude perturbations. The predicted frequencies are in good agreement with those found in simulations. Soliton breathing at amplitudes on the verge of breakup is also a highlight of this work. Even in this extreme nonlinear regime, the wave function perturbation amplitudes are moderate. The simulation data show a stable oscillation with frequency weakly dependent on the oscillation amplitude and hint at a self-consistent quasilinear model for the wave function that accounts for modifications in the ground-state wave function and the equilibrium density. The mock solution, constructed from the simulation data, can shed light on the dynamics of the large-amplitude breathing soliton and support the quasilinear model, as evidenced by its ability to predict well the nonlinear eigenfrequency shifts and large-amplitude breathing frequency observed in simulations." @default.
• W4324100413 created "2023-03-14" @default.
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• W4324100413 date "2023-03-13" @default.
• W4324100413 modified "2023-10-13" @default.
• W4324100413 title "Theory and phenomenology of stressed wave-dark-matter soliton" @default.
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• W4324100413 doi "https://doi.org/10.1103/physrevd.107.063011" @default.
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