Cosmological Thermodynamics in FLRW Model

  • Subhajit SahaEmail author
Part of the SpringerBriefs in Physics book series (SpringerBriefs in Physics)


This chapter is concerned with a thermodynamic analysis on a flat FLRW universe admitting both apparent and event horizons. As the physical system within the cosmological apparent horizon forms a Bekenstein system, so we have considered the Bekenstein entropy and the Hawking temperature on the apparent horizon. However, since the system bounded by the event horizon may not be a Bekenstein system, we have assumed the Clausius relation on the event horizon to determine its entropy variation. Moreover, we have assumed the modified Hawking temperature on the event horizon. Three types of dark energy cosmic fluids have been considered—a perfect fluid with a constant equation of state, an interacting holographic dark energy, and a Chaplygin gas.


Apparent horizon Event horizon Gibbs equation Modified Hawking temperature Generalized Hawking temperature Holographic dark energy Modified Chaplygin gas 


  1. Saha, S., and S. Chakraborty. 2012. A redefinition of Hawking temperature on the event horizon: Thermodynamical equilibrium. Physics Letters B 717: 319.ADSMathSciNetCrossRefGoogle Scholar
  2. Saha, S., and S. Chakraborty. 2014. Do recent observations favor a cosmological event horizon: A thermodynamical prescription? Physical Review D 89: 043512.ADSCrossRefGoogle Scholar

Copyright information

© The Author(s), under exclusive licence to Switzerland AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of MathematicsPanihati MahavidyalayaKolkataIndia

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