论文标题
d-brane与O-Plane动作的T偶性
T-duality of D-brane versus O-plane actions
论文作者
论文摘要
众所周知,在静态仪表中,世界体积和横向kaluza-klein(kk)降低了圆圈上的O平面有效作用,这满足了任意基础空间背景的T偶尔性约束。在本文中,我们表明,由于在d-brane耦合中存在第二个基本形式,以$α'$及更高的速度存在,因此仅适用于任意基本空间背景的耦合子类。它们是$ m = 0 $耦合,其中$ m $是$ \ tilde {b} $ - field的数量(在其上没有派生)。对于$ m> 0 $耦合,基本空间度量必须为块 - 二角形,动量$ u(1)$ vector字段必须为零。但是,指标和向量场的衍生物是任意的。 使用以下假设,即关键维度的有效动作是独立背景的,然后我们证明了对耦合的t二 - 二限制约束,以$α'$和$ m = 0 $的订单,完全修复了批量和边界操作。这些耦合表明,无质量开放式弦乐场的繁殖器接收$α'$ - 校正。 我们还对$ M = 1,2,3,4 $耦合对T-偶尔限制施加了限制。但是,由于对这些情况下的基本空间背景的限制,因此T二维只能以$ m> 0 $的方式部分修复耦合。这项研究表明,以$α'$为单位的散装和边界作用出现了狄拉克出生的污染物(DBI)因子。
It is known that, in the static gauge, the world-volume and the transverse Kaluza-Klein (KK) reductions of the O-plane effective actions on a circle satisfy the T-duality constraint for arbitrary base space background. In this paper we show that due to the presence of the second fundamental form in the D-brane couplings at order $α'$ and higher, the T-duality is satisfied only for a subclass of couplings for arbitrary base space background. They are $m=0$ couplings where $m$ is the number of $\tilde{B}$-field (without derivative on it). For $m>0$ couplings, the base space metric must be block-diagonal and the momentum $U(1)$ vector field must be zero. However, the derivatives of the metric and the vector field are arbitrary. Using the assumption that the effective actions at the critical dimension are background independent, we then show that the T-duality constraint for the couplings at order $α'$ and for $m=0$, fixes completely both bulk and boundary actions. These couplings indicate that the propagators of the massless open string fields receive $α'$-correction. We have also imposed the T-duality constraint on $m=1,2,3,4$ couplings. Because of the above restriction on the base space background in these cases, however, the T-duality can only partially fix the couplings for $m>0$. This study shows that the Dirac-Born-Infeld (DBI) factor appears in both bulk and boundary actions at order $α'$.