Title: [NCTS-NTU String Theory Seminar] Superradiant instability of higher-dimensional black strings
Speaker: Prof. Takaaki Ishii (Rikkyo U.)
Time: Apr. 1st, 2022 (Fri), 14:30-15:30 (Taiwan time) / 15:30-16:30 (Japan time)
Location: Online
Link: https://nationaltaiwanuniversity-zbh.my.webex.com/nationaltaiwanuniversity-zbh.my/j.php?MTID=m3c7ad2edab2a59064237e5e935fb24d6

Abstract:
There is a common belief that higher dimensional black strings do not exhibit superradiant instability. Previously stability has been known for scalar field perturbations. Here, I will talk about the superradiant instability for the six-dimensional rotating black string with equal spins against a gravitational perturbation, along with a discussion about the peculiarity of the instability to the setup that we focus on. I will then also introduce helical black strings branching off from the onset of the instability.