Numerical evolutions show positive-curvature SL(2,R) sigma-model scalars create denser clouds and earlier binary mergers, while negative-curvature O(3) scalars spread out and delay mergers.
The Compton wavelength of the field λC = 2π/µ ∼ 20 is then larger than the initial separation of the bi- nary
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Scalar fields from nonlinear sigma models on black hole spacetimes
Numerical evolutions show positive-curvature SL(2,R) sigma-model scalars create denser clouds and earlier binary mergers, while negative-curvature O(3) scalars spread out and delay mergers.