Penrose Limit and String Theories on Various Brane Backgrounds
Penrose Limit and String Theories on Various Brane Backgrounds
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各种膜背景下的彭罗斯极限和弦理论
DOI：
10.1088/1126-6708/2002/11/005
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发表时间：
2002
影响因子：
5.4
通讯作者：
Y. Sekino
中科院分区：
文献类型：
--
作者：
H. Fuji;K. Ito;Y. Sekino
我们研究了包括DP膜、NS5膜、基本弦、(p，q)五膜和(p，q)弦在内的各种膜解的Penrose极限。我们得到了具有固定径向坐标(临界半径)的特殊零测地线，彭罗斯极限给出了具有常质量的弦理论。我们还研究了具有随时间变化的质量的弦理论，这是由膜背景的彭罗斯极限引起的。我们研究了弦在渐近平坦区域和临界半径附近的运动方程。特别地，对于(p，q)五层膜，我们发现沿B场方向的弦运动方程是用球面波函数显式求解的。
We investigate the Penrose limit of various brane solutions including Dp-branes, NS5-branes, fundamental strings, (p,q) fivebranes and (p,q) strings. We obtain special null geodesics with the fixed radial coordinate (critical radius), along which the Penrose limit gives string theories with constant mass. We also study string theories with time-dependent mass, which arise from the Penrose limit of the brane backgrounds. We examine equations of motion of the strings in the asymptotic flat region and around the critical radius. In particular, for (p,q) fivebranes, we find that the string equations of motion in the directions with the B field are explicitly solved by the spheroidal wave functions.