标题： 德西特磁性黑洞偶极子与超对称视界 显示英文标题

标题： De Sitter magnetic black hole dipole with a supersymmetric horizon

摘要： 我们在$N=2$ $D=4$ 适度超引力中找到一个新的非BPS解，该解与$U(1)$个规范场和物质耦合。 它包含一个闭合宇宙，其中有两个相同大小的极端黑洞，包围着两个奇点。 它们具有相反的磁荷（没有电荷），但由于宇宙常数的正压强而保持静态平衡。 在交换黑洞和翻转电荷符号方面，几何结构是完全对称的。 然而标量场是非常数且不对称的，在视界处有不同的值，这些值取决于一个实模数。 在其中一个视界处，解变为$\frac 12$-BPS 超对称，而在另一个视界处则没有超对称性，但熵仍然与标量模数无关。 显示英文摘要

摘要： We find a new non BPS solution in $N=2$ $D=4$ gauged supergravity coupled to $U(1)$ gauge fields and matter. It consists in a closed universe with two extremal black holes of equal size, surrounding two singularities. They have opposite magnetic charges (and no electric charges), but stay in static equilibrium thanks to the positive pressure of a cosmological constant. The geometry is perfectly symmetric under the exchange of the black holes and the flip of the sign of the charges. However the scalar field is non constant and non symmetric, with different values at the horizons, which depend on a real modulus. At one of the horizon the solution becomes $\frac 12$-BPS supersymmetric, while at the other one there is no supersymmetry, but the entropy remains independent from the scalar modulus.