Anisotropic Expansion and Late-Time Acceleration in Bimetric Gravity: LRS Bianchi Type-I Universe with Stiff Matter

Key Points

• The LRS Bianchi type-I universe exhibits anisotropic expansion, influenced by a special law of variation for the Hubble parameter.
• Using Rosen's field equations, a Zeldovich universe is derived that demonstrates an accelerating nature under specific conditions.
• This analysis provides insights into the geometrical and physical aspects of the model, enhancing understanding of cosmic expansion.
• Key implications of the model indicate that the interplay between anisotropic fluid and gravity may impact late-time cosmic acceleration.