标题： 非奇异施瓦西-德西特黑洞 显示英文标题

标题： Nonsingular Schwarzschild-de Sitter Black Hole

摘要： 我们将自然界中的最大曲率尺度与最小曲率尺度的概念结合起来，构造了一个非奇异的Schwarzschild-de Sitter黑洞。我们在二维dilaton引力的背景下给出了一个精确解。对于某些参数范围，当径向坐标取大值时，该解接近Schwarzschild-de Sitter；当径向坐标趋于无穷大时，渐近接近具有常量最小曲率的de Sitter度规，而当径向坐标趋于零时，接近具有最大常量曲率的光滑时空。时空是测地线完备的，并且通常同时具有黑洞视界和宇宙学视界。 显示英文摘要

摘要： We combine notions of a maximal curvature scale in nature with that of a minimal curvature scale to construct a non-singular Schwarzschild-de Sitter black hole. We present an exact solution within the context of two-dimensional dilaton gravity. For a range of parameters the solution approaches Schwarzschild-de Sitter at large values of the radial coordinate, asymptotically approaching a de Sitter metric with constant minimal curvature, while approaching a maximal constant curvature smooth spacetime as the radial coordinate approaches zero. The spacetime is geodesically complete and generically has both a black hole horizon and a cosmological horizon.