Thermodynamics of Barrow Holographic Dark Energy with Specific Cut-Off

Motivated by the work of Saridakis (Phys. Rev. D 102, 123525 (2020)), the present study reports the cosmological consequences of Barrow holographic dark energy (HDE) and its thermodynamics. The literature demonstrates that dark energy (DE) may result from electroweak symmetry breaking that triggers a phase transition from early inflation to late-time acceleration. In the present study, we incorporated viscosity in the Barrow HDE. A reconstruction scheme is presented for the parameters associated with Barrow holographic dark energy under the purview of viscous cosmology. The equation of state (EoS) parameter is reconstructed in this scenario and quintessence behaviour is observed. Considering Barrow HDE as a specific case of Nojiri-Odintsov (NO) HDE, we have observed quintom behaviour of the EoS parameter and for some values of n the EoS has been observed to be very close to -1 for the current universe. The generalised second law of thermodynamics has come out to be valid in all the scenarios under consideration. Physical viability of considering Barrow HDE as a specific case of NO HDE is demonstrated in this study. Finally, it has been observed that the model under consideration is very close to ?CDM and cannot go beyond it.

Automated summary

This study investigates the cosmological consequences and thermodynamics of Barrow holographic dark energy (HDE), incorporating viscosity and reconstructions of parameters associated with Barrow HDE. Observations of quintessence and quintom behavior, as well as the validity of the generalized second law of thermodynamics, are reported. The study demonstrates the physical viability of considering Barrow HDE as a specific case of NO HDE but concludes that the model is limited to being very close to ΛCDM and cannot go beyond it.