13 citations · 40 across the 7 of their papers we have counts for
7 papers
Efficient High-order Mass-conserving and Energy-balancing Schemes for Schrödinger-Poisson Equations
Manvendra Pratap Rajvanshi, David I. Ketcheson
We study relaxation-based approaches for conserving mass and energy in the numerical solution of Schrödinger-Poisson (SP) type systems. Relaxation-based methods offer a general app…
A Hyperbolic Approximation of the Nonlinear Schrödinger Equation
Abhijit Biswas, Laila S. Busaleh, David I. Ketcheson +2
We study a first-order hyperbolic approximation of the nonlinear Schrödinger (NLS) equation. We show that the system is strictly hyperbolic and possesses a modified Hamiltonian str…
Cosmological Evolution in Bimetric Gravity: Observational Constraints and LSS Signatures
Ajay Bassi, Shahnawaz A. Adil, Manvendra Pratap Rajvanshi +1
Bimetric gravity is an interesting alternative to standard GR given its potential to provide a concrete theoretical framework for a ghost-free massive gravity theory. Here we inves…
Tachyonic vs Quintessence dark energy: linear perturbations and CMB data
Manvendra Pratap Rajvanshi, Avinash Singh, H. K. Jassal +1
We use linear perturbation theory to study perturbations in dynamical dark energy models. We compare quintessence and tachyonic dark energy models with identical background evoluti…
Non-linear spherical collapse in tachyon models, and a comparison of collapse in tachyon and quintessence models of dark energy
Manvendra Pratap Rajvanshi, J. S. Bagla
We study evolution of perturbations in dark matter and dark energy for spherical collapse. We study Tachyon models of dark energy using the approach outlined in Rajvanshi and Bagla…
Reconstruction of Dynamical Dark Energy Potentials: Quintessence, Tachyon and interacting models
Manvendra Pratap Rajvanshi, J. S. Bagla
Dynamical models for dark energy are an alternative to the cosmological constant. It is important to investigate properties of perturbations in these models and go beyond the smoot…
Nonlinear spherical perturbations in Quintessence Models of Dark Energy
Manvendra Pratap Rajvanshi, Jasjeet Singh Bagla
Observations have confirmed the accelerated expansion of the universe. The accelerated expansion can be modelled by invoking a cosmological constant or a dynamical model of dark en…