论文标题
在关键维度上有效行动的背景独立性
Background independence of effective actions at critical dimension
论文作者
论文摘要
最近，通过按订单的$α'，α'^2，α'^3 $的明确计算，已经观察到，在临界维度上弦理论的有效作用与封闭的时空歧管的背景无关。在本文中，我们推测，对于开放的时空歧管，有效的动作甚至独立于边界的特征，\ ie \ ie时脉冲和空格型边界的边界耦合是相同的。我们通过计算玻色丝弦理论中的边界耦合以$α'$计算超级边界的阶层，并表明它们与最近发现的时空边界的耦合相同。
Recently, by explicit calculations at orders $α',α'^2,α'^3$, it has been observed that the effective action of string theory at the critical dimension is independent of the background for the closed spacetime manifolds. In this paper we speculate that for the open spacetime manifolds, the effective action is even independent of the character of the boundary, \ie the boundary couplings for timelike and spacelike boundaries are the same. We support this proposal by calculating the boundary couplings in the bosonic string theory at order $α'$ for the spacelike boundary and show that they are the same as the couplings for the timelike boundary that have been recently found.
