标题： 各向异性弦宇宙学在大曲率下 显示英文标题

标题： Anisotropic String Cosmology at Large Curvatures

摘要： 我们研究反称张量场$B_{\mu\nu}$对弦宇宙学中大曲率阶段的影响。 众所周知，$H=dB$的非零值会导致空间维度的各向异性膨胀。 相应地，在模型的弦相中，包括$\alpha '$修正，我们发现演化的各向异性固定点，这些固定点作为最低阶解的正则化吸引子。 吸引盆地还可以包含尺度因子的各向同性初始条件。 我们给出了在阶数$\alpha '$下的不同空间维数和不同$H$假设的显式例子。 显示英文摘要

摘要： We study the effect of the antisymmetric tensor field $B_{\mu\nu}$ on the large curvature phase of string cosmology. It is well-known that a non-vanishing value of $H=dB$ leads to an anisotropic expansion of the spatial dimensions. Correspondingly, in the string phase of the model, including $\alpha '$ corrections, we find anisotropic fixed points of the evolution, which act as regularizing attractors of the lowest order solutions. The attraction basin can also include isotropic initial conditions for the scale factors. We present explicit examples at order $\alpha '$ for different values of the number of spatial dimensions and for different ans\"{a}tze for $H$.