标题： 一些新的光锥时间依赖解在变形的pp波背景下 显示英文标题

标题： Some New Light-cone Time Dependent Solutions in Deformed pp-wave Backgrounds

摘要： 在光锥时间相关的背景下，膜解对于深入理解与宇宙学和光锥奇点相关的物理现象具有重要意义。 本文中，我们报道了在光锥时间相关的类似pp波背景下的膜解及其束缚态。 我们展示出我们的解所存在的背景在经典水平上都是宇宙学奇异（光锥）的。 对这些背景的时空超对称性分析显示，它们保留了全IIB超对称性的1/8。 显示英文摘要

摘要： Brane solutions in time \ light-cone time dependent backgrounds are of interest in order to gain a deeper understanding of the physics associated with cosmological and null singularities. In this paper, we report both brane solutions and their bound states in light-cone time dependent pp wave-like backgrounds. We show that the backgrounds our solutions live in are all cosmologically singular (lightlike) at the classical level. A spacetime supersymmetry analysis of the backgrounds reveals that they retain 1/8 of the full type IIB supersymmetry.