Absorption of charged particles in a Reissner-Nordstr\"om Black-Hole:   entropy evolution from Relativistic Quantum Geometry
  Using Relativistic Quantum Geometry we show that the entropy can decrease in very small BHs, under certain circumstances, but always increases in very massive Black-Holes. 
Marcos R. A. Arcod\'ia, Luis Santiago Ridao, Mauricio Bellini (IFIMAR   - CONICET & UNMdP)
gr-qc