In this work some nonlinear integral equation is studied. This equation has arisen in the (super)string field theory and cosmology. In this work it is proved that some boundary problem for this equation has a solution.
All-multiplicity monodromy and KLT relations for AdS string integrals
Simons Center for Geometry and Physics, Stony Brook(石溪大学西蒙斯几何与物理中心);ICTP South American Institute for Fundamental Research, Instituto de Física Teórica, Universidade Estadual Paulista (UNESP)(国际理论物理研究所南美基础研究所,圣保罗州立大学理论物理研究所);Mathematical Institute, University of Oxford(牛津大学数学研究所);Department of Mathematical Sciences, Tsinghua University(清华大学数学科学系)
The perturbative path-integral gives a morphism of the (quantum) $A_{\infty }$ structure intrinsic to each quantum field theory, which we show explicitly on the basis of the homological perturbation. As is known, in the BV formalism, any effective action also solves the BV master equation, which implies that the path-integral can be understood as a morphism of the BV differential. Since each solution of the BV master equation is in one-to-one correspondence with a (quantum) $A_{\infty }$ structure, the path-integral preserves this intrinsic $A_{\infty }$ structure of quantum field theory, wher…
We use the techniques of integral forms to analyse the easiest example of two dimensional sigma models on a supermanifold. We write the action as an integral of a top integral form over a D=2 supermanifold and we show how to interpolate between different superspace actions. Then, we consider curved supermanifolds and we show that the definitions used for flat supermanifold can also be used for curved supermanifolds. We prove it by first considering the case of a curved rigid supermanifold and then the case of a generic curved supermanifold described by a single superfield $E$.
We prove that the p-adic Koba-Nielsen type string amplitudes are bona fide integrals. We attach to these amplitudes Igusa-type integrals depending on several complex parameters and show that these integrals admit meromorphic continuations as rational functions. Then we use these functions to regularize the Koba-Nielsen amplitudes. As far as we know, there is no a similar result for the Archimedean Koba-Nielsen amplitudes. We also discuss the existence of divergencies and the connections with multivariate Igusa's local zeta functions.
Matrix models from operators and topological strings, 2
镜像曲线到复曲面Calabi-Yau三重的量子化导致迹类算子,并且已经证明,这些算子的谱性质提供了拓扑弦论在这些背景下的非微扰实现。本文利用Faddeev量子双对数,给出了局部P1 xP 1情形下迹类算子积分核的一种显式形式。与该积分核相关联的矩阵模型是O(2)模型,其推广了ABJ(M)矩阵模型。我们发现它的确切的平面极限,我们提供了详细的证据,它的1/N展开捕获所有属拓扑弦自由能本地P1 xP 1。
We study the application of IBL-infinity-algebras to string topology and explicitly compute the case of spheres. This involves finding a Green kernel and computing integrals associated to trivalent ribbon graphs, which are similar to integrals from perturbative Chern-Simons theory. We generalize the computation and show that the twisted IBL-infinity-structure in question is in many cases trivial.