论文标题
SYK样模型的亚ads全息图的障碍
An obstacle to sub-AdS holography for SYK-like models
论文作者
论文摘要
我们认为，类似于SYK的模型的假定重力二维图中的“严格”效应与分支时间有关，分支时间是一种按延迟的内核定义的动力系数。假设前图是梯子较薄的梯子，则建立了分支时间上的绑定。因此，此类模型不太可能用于亚ads全息图。在弱耦合极限中，我们使用两个不同的近似值在分支时间，Lyapunov指数和准粒子寿命之间得出了一个关系。
We argue that "stringy" effects in a putative gravity-dual picture for SYK-like models are related to the branching time, a kinetic coefficient defined in terms of the retarded kernel. A bound on the branching time is established assuming that the leading diagrams are ladders with thin rungs. Thus, such models are unlikely candidates for sub-AdS holography. In the weak coupling limit, we derive a relation between the branching time, the Lyapunov exponent, and the quasiparticle lifetime using two different approximations.
