Abstract:

Type II string theory has BPS brane bound states that carry two charges. I will show that their microcanonical ensemble average corresponds to a spherical black hole mimicker, which possesses a long throat, shares the same asymptotic data as a black hole and admits parametrically large redshift. Also, I will show that when gauge modes on the branes are highly excited, solutions representing these bound states better mimic black holes, making them possible mediators of the transition between weakly coupled branes to the black hole phase. Time permitting, I will comment on three-charge black hole mimickers.