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Metastable Dark Energy with Radioactive-like Decay
Arman Shafieloo, Dhiraj Kumar Hazra, Varun Sahni +1
We propose a new class of metastable dark energy (DE) phenomenological models in which the DE decay rate does not depend on external parameters such as the scale factor or the curv…
Constraining the Cosmology of the Phantom Brane using Distance Measures
Ujjaini Alam, Satadru Bag, Varun Sahni
The phantom brane has several important distinctive features: (i) Its equation of state is phantom-like, but there is no future `big rip' singularity, (ii) the effective cosmologic…
Cosmological perturbations on the Phantom brane
Satadru Bag, Alexander Viznyuk, Yuri Shtanov +1
We obtain a closed system of equations for scalar perturbations in a multi-component braneworld. Our braneworld possesses a phantom-like equation of state at late times, $w_{\rm ef…