A resolution of the Loschmidt paradox on the Boltzmann H Theorem
  A resolution of the Loschmidt paradox on the Boltzmann H theorem is proposed, based on some new concepts concerning motion backwards in time. The key to this resolution, taken from our interpretation of motion backwards in time, is the associated notion of negative mass, attributed to particles moving backwards in time, which we call retro particles, or simply retrons. 
Evangelos Chaliasos