标题： 具有弦论修正的核化D膜上的de Sitter真空 显示英文标题

标题： De Sitter vacuum on nucleated D-branes with stringy corrections

摘要： 我们发现在探针D-膜上存在四维de Sitter（dS）真空解，这些D-膜在渐近于$\text{AdS}_5\times T^{1,1}$背景中形成，其中包括弦修正。 由卷绕的D3-膜电荷引起的足够高的化学势（打破了体积中的超对称性），对于探针D-膜的形成至关重要。 我们表明，弦修正可以在一个球形D3-膜上产生一个与观测一致的dS真空，而无需进行微调。 受传播在紧致额外维度中的物质场可以为粒子物理和宇宙学问题提供解决方案这一事实的启发，我们还构造了一个探针D5-膜上的dS真空，该D5-膜包裹了内部流形$T^{1,1}$的一个二环。 此构造需要开启D5-膜包裹部分的世界体积U(1)规范场，并溶解一些D3-膜到其中。 弦修正在产生dS真空方面起着重要作用，且U(1)规范场的场强必须足够大才能产生极小的宇宙常数。 显示英文摘要

摘要： We find four-dimensional de Sitter (dS) vacuum solutions on probe D-branes which nucleate in an asymptotically $\text{AdS}_5\times T^{1,1}$ background, including stringy corrections. A sufficiently high chemical potential induced by the wrapped D3-brane charge, breaking supersymmetry in the bulk, is essential to lead to the nucleation of the probe D-brane. We show that stringy corrections can yield a dS vacuum on a spherical D3-brane consistent with the observations without being fine-tuned. Motivated by the fact that the matter fields propagating in the compact extra dimensions can provide solutions for problems in particle physics and cosmology, we also construct a dS vacuum on a probe D5-brane which wraps on a two-torus of the internal manifold $T^{1,1}$. This construction requires turning on a worldvolume U(1) gauge field along the wrapped part of the D5-brane and dissolving some D3-branes in it. The stringy corrections play an important role in yielding a dS vacuum and the field strength of the U(1) gauge field must be sufficiently large to produce a tiny cosmological constant.