An antipolaron is a particle opposite to a polaron. In 2367, Captain John Greene informed the M'Tar Liaison the USS Prospect was firing an antipolaron burst at the USS Artemis's secondary hull to disperse a deadly build-up of chronometric particles. In reality, the Prospect's navigational deflector was emitting a coherent graviton pulse to disperse tetryons from an anomaly preventing them from transporting an away team back to the Prospect. (Star Trek: The Prospect Chronicles: "Lady Lazarus") Greene was lying, so whether there are such things as antipolarons could be disputed.