In this paper, we show that a pseudo-Nambu–Goldstone boson (PNGB) quintessence of spontaneous symmetry breaking (SSB) is responsible for an epoch of late-time cosmic acceleration. We suggest that an N = 2PNGB quintessence with SSB can give rise to the fast-roll cosmic acceleration in the evolution of the Universe. In the N = 2 PNGB quintessence model, the standard slow-roll condition in which the absolute value of the tachyonic mass squared \(|m_q^2|\) of this model is much less than the square of the Hubble constant \(H^2\), is broken down to the fast-roll condition, \(|m_q^2|=O(H^2)\). However, the fast-rolling associated with the N = 2 PNGB quintessence of SSB is shown to lead to the epoch of late-time cosmic acceleration. Indeed, in our PNGB model, this epoch can be quite long-lasting because the mass of the N = 2 PNGB quintessence field is extremely small at \(m_q \approx 10^{-33} \mathrm {eV}\).

在本文中，我们展示了自发对称性破缺 (SSB) 的伪南布-戈德斯通玻色子 (PNGB) 精髓是后期宇宙加速时代的原因。我们建议N = 2PNGB 的 SSB 精髓可以在宇宙演化中产生快速滚动的宇宙加速。在N = 2 PNGB 典型模型中，标准慢滚条件，其中该模型的快子质量平方\(|m_q^2|\)的绝对值远小于哈勃常数的平方\(H ^2\)，分解为快速滚动条件\(|m_q^2|=O(H^2)\)。然而，与N相关的快速滚动= 2 SSB 的 PNGB 精髓被证明会导致晚期宇宙加速时代。事实上，在我们的 PNGB 模型中，这个时代可能会持续很长时间，因为N = 2 PNGB 精华场的质量在\(m_q \approx 10^{-33} \mathrm {eV}\)处非常小。