Hafiza Zarish Arshad, FA14-BSM-001Dr. Abdul Jawad, Assistant ProfesorLHR TP 52522026-04-212016https://repository.cuilahore.edu.pk/123456789/3651In this thesis, we study the effects of thermal fluctuations on regular black hole solutions with cosmological constant and Einstein-aether black hole with coupling constant respectively. We consider the logarithmic corrected entropy in order to analyzing the thermal fluctuations on regular black hole solutions and Einstein-aether black hole. We also obtain various thermo dynamical quantities such as entropy, pressure, specific heats, Gibb’s free energy and Helmholtz free energy. We also investigate the stability of reg ular black hole solution and Einstein-aether black hole in terms of γ, phase transition, grand canonical ensemble and canonical ensemble. We analyze that regular black hole are stable when we increase the value of cosmologi cal constant and Einstein-aether black hole are stable when we increase the value of coupling constant respectively.endepartment of mathematicsFA16Dr. Abdul JawadAssistant Profesorffects of thermal fluctuations on regular black hole solutions with cosmological constant and Einstein-aether black hoThesis