论文标题
4+1个Brane-World模型中的Sitter和Minkowski解决方案
De Sitter and Minkowski Solutions in 4+1 Brane-World Models
论文作者
论文摘要
我们评论4+1个维度中宇宙学恒定问题的方法，标准模型字段仅限于3个大国。我们表明，仅在这3-武器上需要最大的4D对称性（而不是在所有其他3个烤架上散落4+1维空间）会导致brane上的一类DE Sitter溶液，其哈勃常数由Brane张力和大量标量电位产生。对于Brane上的Poincaré对称性，始终需要微调。 DE Sitter解决方案是在特殊的动力学点生成的。与这一点相比，与E折数的数量成倍增长。
We comment on approaches to the Cosmological Constant Problem in 4+1 dimensions, with the Standard Model fields confined to a 3-brane. We show that requiring maximal 4D symmetry only on this 3-brane (and not on all other 3-branes that foliate the 4+1-dimensional space) leads to a wide class of de Sitter solutions on the brane, with the Hubble constant sourced by the brane tension and a bulk scalar potential. For Poincaré symmetry on the brane, fine-tuning is always necessary. The de Sitter solutions are generated at a special dynamical point. Small deviations from this point are shown to grow exponentially with the number of e-folds.
