  We analyse vacuum decay in rotating BTZ black hole spacetimes with the thin
wall approximation. Possible parameter regions for the vacuum decay are
clarified. We find that the nucleation rate is dominated by the bounce solution
with the static shell configuration. The nucleation rate of the static shell
decreases with the mass of the initial black hole. For a larger/smaller value
of the initial black hole, the nucleation rate can be smaller/larger than that
of the Coleman De Luccia vacuum decay in the pure AdS spacetime. Through the
vacuum decay, the black hole gains its mass and loses the horizon area. We also
find that the nucleation rate increases with increasing the angular momentum of
the spacetime.
