We present a model in which the Gauss-Bonnet invariant holds the quintessence at a fixed point, respecting an initial symmetry in the radiation-dominated era. This results in an early dark energy that becomes significant around the matter-radiation equality era. However, due to symmetry breaking, scalarization occurs, leading to a rapid reduction in the early dark energy density. The model then quickly behaves like the ΛCDM model. This scenario may also explain the reduction of sound horizon and aligns with the assumption that the gravitational wave speed is infinitesimally close to the speed of light.

中文翻译：

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标量张量模型中的早期暗能量和标量化


我们提出了一个模型，其中高斯-博内不变量将精髓保持在固定点，尊重辐射主导时代的初始对称性。这导致早期的暗能量在物质辐射平等时代变得重要。然而，由于对称性破缺，发生标量化，导致早期暗能量密度迅速降低。该模型很快就会表现得像 ΛCDM 模型。这种情况也可以解释声视界的减小，并与引力波速度无限接近光速的假设相一致。