论文标题
无鬼无限衍生的dilaton重力在二维
Ghost-free infinite-derivative dilaton gravity in two dimensions
论文作者
论文摘要
我们在两个时空尺寸中介绍了球形降低的重力（SRG）和Callan-Giddings-Harvey-Strominger（CGHS）理论的无鬼无限衍生扩展。对于SRG的情况，我们指定了Schwarzschild型量表，并对角线对二次扰动的二次作用，将背景字段视为具有线性diLATON的平面溶液的二次扰动。使用获得的对角化，我们构建了SRG理论的无鬼无限衍生修饰。在这种修改的SRG理论的背景下，我们得出了线性降低的Schwarzschild解决方案的非本地修改。对于CGHS重力，我们在保形规格和对角线上工作，与该理论相关的二次作用用于通用背景解决方案。使用这些结果，我们构建了CGHS理论的无幽灵无限衍生化修饰，并检查对线性化的CGHS黑洞解决方案的非本地修饰。
We present the ghost-free infinite-derivative extensions of the Spherically-Reduced Gravity (SRG) and Callan-Giddings-Harvey-Strominger (CGHS) theories in two space-time dimensions. For the case of SRG, we specify the Schwarzschild-type gauge and diagonalise the quadratic action for field perturbations after taking the background fields to be those of the flat-space solution with a linear dilaton. Using the obtained diagonalisation, we construct ghost-free infinite-derivative modifications of the SRG theory. In the context of this modified SRG theory we derive a non-local modification of the linearised spherically-reduced Schwarzschild solution. For the case of CGHS gravity, we work in the conformal gauge and diagonalise the quadratic action associated with this theory for a general background solution. Using these results, we construct the ghost-free infinite-derivative modifications of the CGHS theory and examine non-local modifications to the linearised CGHS black-hole solution.
