2 papers
gr-qc2025
Bose-Einstein Condensate dark matter with logarithmic nonlinearity
Zahra Haghani, Tiberiu Harko
If dark matter is composed of massive bosons, a Bose-Einstein Condensation process must have occurred during the cosmological evolution. Therefore, galactic dark matter may be in a…
gr-qc2024
The first variation of the matter energy-momentum tensor with respect to the metric, and its implications on modified gravity theories
Zahra Haghani, Tiberiu Harko, Shahab Shahidi
The first order variation of the matter energy-momentum tensor with respect to the metric tensor plays an important role in modified gravity theories with geo…