Validity of Generalized Second Law of Thermodynamics in the Logamediate   and Intermediate scenarios of the Universe
  In this work, we have investigated the validity of the generalized second law of thermodynamics in logamediate and intermediate scenarios of the universe bounded by the Hubble, apparent, particle and event horizons using and without using first law of thermodynamics. We have observed that the GSL is valid for Hubble, apparent, particle and event horizons of the universe in the logamediate scenario of the universe using first law and without using first law. Similarly the GSL is valid for all horizons in the intermediate scenario of the universe using first law. Also in the intermediate scenario of the universe, the GSL is valid for Hubble, apparent and particle horizons but it breaks down whenever we consider the universe enveloped by the event horizon. 
Arundhati Das (Bengal Engineering and Science University, Shibpur),   Surajit Chattopadhyay (Pailan College of Management an...
physics.gen-ph gr-qc