147 citations · 345 across the 11 of their papers we have counts for
11 papers
Cyclic universe and uniform rate inflation in loop quantum cosmology
Bikash Chandra Paul, Sahil Saini
We investigate uniform rate inflationary universe in the framework of loop quantum cosmology (LQC) and find that this seemingly simple inflationary model is interlinked with variou…
Ekpyrosis in Quantum Gravitational Anisotropic Bouncing Models
Rachel Brown, A. Meenakshi McNamara, Sahil Saini +1
We explore the isotropization of a model anisotropic universe in the bouncing models using the ekpyrotic potential without assuming initial conditions corresponding to an ekpyrotic…
Spherically symmetric loop quantum gravity: Schwarzschild spacetimes with a cosmological constant
Esteban Mato, Javier Olmedo, Sahil Saini
We provide a quantization of the Schwarzschild spacetime in the presence of a cosmological constant, based on midisuperspace methods developed in the spherically symmetric sector o…
On a novel relationship between shear and energy density at the bounce in non-singular Bianchi-I spacetimes
A. Meenakshi McNamara, Sahil Saini, Parampreet Singh
In classical Bianchi-I spacetimes, underlying conditions for what dictates the singularity structure - whether it is anisotropic shear or energy density, can be easily determined f…
Primordial power spectrum from a matter-Ekpyrotic bounce scenario in loop quantum cosmology
Bao-Fei Li, Sahil Saini, Parampreet Singh
A union of matter bounce and Ekpyrotic scenarios is often studied in an attempt to combine the most promising features of these two models. Since non-perturbative quantum geometric…
Von Neumann stability of modified loop quantum cosmologies
Sahil Saini, Parampreet Singh
Von Neumann stability analysis of quantum difference equations in loop quantized spacetimes has often proved useful to understand viability of quantizations and whether general rel…
Generic absence of strong singularities and geodesic completeness in modified loop quantum cosmologies
Sahil Saini, Parampreet Singh
Different regularizations of the Hamiltonian constraint in loop quantum cosmology yield modified loop quantum cosmologies, namely mLQC-I and mLQC-II, which lead to qualitatively di…
Generic absence of strong singularities in loop quantum Bianchi-IX spacetimes
Sahil Saini, Parampreet Singh
We study the generic resolution of strong singularities in loop quantized effective Bianchi-IX spacetime in two different quantizations - the connection operator based `A' quantiza…
Resolution of strong singularities and geodesic completeness in loop quantum Bianchi-II spacetimes
Sahil Saini, Parampreet Singh
Generic resolution of singularities and geodesic completeness in the loop quantization of Bianchi-II spacetimes with arbitrary minimally coupled matter is investigated. Using the e…
From black holes to white holes: a quantum gravitational, symmetric bounce
Javier Olmedo, Sahil Saini, Parampreet Singh
Recently a consistent non-perturbative quantization of the Schwarzschild interior resulting in a bounce from black hole to white hole geometry has been obtained by loop quantizing…
Geodesic completeness and the lack of strong singularities in effective loop quantum Kantowski-Sachs spacetime
Sahil Saini, Parampreet Singh
Resolution of singularities in the Kantowski-Sachs model due to non-perturbative quantum gravity effects is investigated. Using the effective spacetime description for the improved…