Speaker
Description
Black holes are not unique in higher dimensions. It is well known that, in five dimensions, stationary, biaxisymmetric black holes with the horizon of $S^3$-topology and $S^2 \times S^1$-topology can exist for the same asymptotic charges, in contrast to the black holes in four dimensions where the horizon must have $S^2$-topology.
In this talk, we aim to demonstrate that even if the horizon topology is fixed to be $S^3$, the black hole in five dimensions is still not unique in terms of asymptotic charges.For this, we present a new type of spherical black hole endowed with a nontrivial spacetime structure called "bubble" attached on the horizon [1].The new spherical black hole, which we call a "capped black hole", is the non-BPS solution of five-dimensional minimal supergravity, constructed by the combination of two different solution generating techniques: the inverse scattering method and electric Harrison transformation [2]. We briefly introduce the basic feature of the new solution and then compare it with the known spherical black hole (Cvetic-Youm black hole). As a result, we show that the two solutions can have the same asymptotic charges, i.e. the uniqueness is violated for the $S^3$-horizon. Moreover, we find that the new solution can have the larger entropy than the Cvetic-Youm black hole in a certain parameter range.
References
[1] R. Suzuki and S. Tomizawa,
``A Capped Black Hole in Five Dimensions,''
[arXiv:2311.11653 [hep-th]].
[2] R. Suzuki and S. Tomizawa,
``Solution Generation of a Capped Black Hole,''
[arXiv:2403.17796 [hep-th]].
