  In a collisional Penrose process, two particles coming from the
asymptotically flat region collide in the ergosphere of a compact object. The
collision produces two new particles, one with positive energy and one with
negative energy. When the particle with positive energy escapes to infinity,
the process extracts energy from the compact object. In this paper, we study
the collisional Penrose process in a rotating wormhole spacetime. We consider
the simple case of a head-on collision at the throat of a Teo wormhole. We find
that the process of energy extraction from a Teo wormhole can be substantially
more efficient than the collisional Penrose process in the Kerr black hole
spacetime.
