论文标题
通过在动态弦张力braneworld模型中制作婴儿宇宙来缓解弦张力
Relieving String Tension By Making Baby Universes in a Dynamical String Tension Braneworld Model
论文作者
论文摘要
字符串张力从根本上确定字符串的特性；然而，它的价值通常是任意分配的，从而造成了微调问题。我们描述了一种使用修改的措施形式主义在平坦或几乎平坦的时空中动态生成弦张力的机制，从而自然会生成一种新型的丝状brane-world情况。这种情况使字符串可以达到近乎无限的张力，将字符串限制在两个非常紧密的膨胀表面上，但是无限的紧张局势也有可能通过大型背部反应扭曲了近盘的嵌入时空。我们认为，这种危险可以通过创建婴儿宇宙而被中和，这是一个日益增长的时空区域，它与周围的嵌入时空离婚，而我们的宇宙仍然是一个笨拙的空间，分隔了两个几乎平坦的空间。还讨论了在动态弦张力产生的背景下避免最小长度和最高Hagedorn温度。
String tension fundamentally determines the properties of strings; yet its value is often assigned arbitrarily, creating a fine-tuning problem. We describe a mechanism for dynamically generating string tension in a flat or almost flat spacetime, using the modified measures formalism, which in turn naturally generates a new type of stringy brane-world scenario. Such a scenario allows strings to achieve near infinite tension confining the strings to two very close expanding surfaces, but the infinite tensions also threatens to distort the near-flat embedding spacetime through large back reactions. We argue that this danger can be neutralised via the creation of a baby universe, a growing region of emdedding spacetime that divorces from the ambient embedding spacetime, while our universe is still a brane separating two nearly flat spacetimes. The avoidance of a minimum length and a maximum Hagedorn temperature in the context of dynamical string tension generation are also discussed.
