61 citations · 306 across the 21 of their papers we have counts for
21 papers
Can gravity isotropize a pre-bounce contracting universe?
Simran Arora, Sanjay Mandal, Saikat Chakraborty +2
We address the important issue of isotropisation of a pre-bounce contracting phase in gravity, which would be relevant to construct any viable nonsingular bouncing scenario…
A comprehensive analysis of the compact phase space for Hu-Sawicki dark energy models including spatial curvature
Kelly MacDevette, Peter Dunsby, Saikat Chakraborty
We present a comprehensive dynamical systems analysis of homogeneous and isotropic Friedmann-Laîmatre-Robertson-Walker cosmologies in the Hu-Sawicki dark energy model for th…
On the uniqueness of CDM-like evolution for homogeneous and isotropic cosmology in General Relativity
Saikat Chakraborty, Daniele Gregoris, B. Mishra
We address the question of the uniqueness of spatially flat CDM-like evolution for FLRW cosmologies in General Relativity, i.e. whether any model other than the spatially flat $…
A note on the dynamical system formulations in gravity
Saikat Chakraborty, Peter K. S. Dunsby, Kelly Macdevette
A number of dynamical system formulations have been proposed over the last few years to analyse cosmological solutions in gravity. The aim of this article is to provide a br…
Time-averaging axion-like interacting scalar fields models
Saikat Chakraborty, Esteban González, Genly Leon +1
In this paper, we study a cosmological model inspired in the axionic matter with two canonical scalar fields and interacting through a term added to its potential. Intr…
Cosmological evolution with quadratic gravity and nonideal fluids
Saikat Chakraborty, Daniele Gregoris
Some cosmological models based on the gravitational theory , and on fluids obeying to the equations of state of Redlich-Kwong, Berthelot, and Dieterici are proposed…
A model independent approach to the study of cosmologies with expansion histories close to CDM
Saikat Chakraborty, Kelly MacDevette, Peter Dunsby
We propose a new framework for studying the cosmology of gravity which completely avoids using the reconstruction programme. This allows us to easily obtain a qualitative fe…
Relaxation in a Phase-separating Two-dimensional Active Matter System with Alignment Interaction
Saikat Chakraborty, Subir K. Das
Via computer simulations we study kinetics of pattern formation in a two-dimensional active matter system. Self-propulsion in our model is incorporated via the Vicsek-like activity…
Initial Correlation Dependence of Aging in Phase Separating Solid Binary Mixtures and Ordering Ferromagnets
Subir K. Das, Koyel Das, Nalina Vadakkayil +2
Following quenches of initial configurations having long range spatial correlations, prepared at the demixing critical point, to points inside the miscibility gap, we study aging p…
Dynamical equivalence of gravity in Jordan and Einstein frames
Saikat Chakraborty, Sanchari Pal, Alberto Saa
We investigate the dynamics of gravity in Jordan and Einstein frames. First, we perform a phase-space singularities analysis in both frames. We show that, typically, anisotr…
Finite-Size Scaling Study of Aging during Coarsening in Non-Conserved Ising Model: The case of zero temperature quench
Nalina Vadakkayil, Saikat Chakraborty, Subir K. Das
Following quenches from random initial configurations to zero temperature, we study aging during evolution of the ferromagnetic (nonconserved) Ising model towards equilibrium, via…
Early universe cosmological solutions in exponential gravity
Pritha Bari, Kaushik Bhattacharya, Saikat Chakraborty
In this work we present some cosmologically relevant solutions using the spatially flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime in metric gravity where the form…
Dynamical properties of Bianchi-I spacetimes in gravity
Saikat Chakraborty, Kazuharu Bamba, Alberto Saa
We present a dynamical analysis in terms of new expansion-normalized variables for homogeneous and anisotropic Bianchi-I spacetimes in gravity in the presence of anisotropic…
Reconstruction method of gravity for isotropic and anisotropic spacetimes
Saikat Chakraborty
We present the reconstruction method of gravity for the homogeneous and anisotropic Bianchi-I spacetime, which was previously formulated only for homogeneous and isotropic F…
Causal horizons in a bouncing universe
Kaushik Bhattacharya, Pritha Bari, Saikat Chakraborty
As our understanding of the past in a bouncing universe is limited, it becomes difficult to propose a cosmological model which can give some understanding of the causal structure o…
Nonlinear anisotropy growth in Bianchi-I spacetime in metric cosmology
Kaushik Bhattacharya, Saikat Chakraborty
The present work is related to anisotropic cosmological evolution in metric theory of gravity. The initial part of the paper develops the general cosmological dynamics of ho…
Coarsening in 3D Nonconserved Ising Model at Zero Temperature: Anomalies in structure and relaxation of order-parameter autocorrelation
Saikat Chakraborty, Subir K. Das
Via Monte Carlo simulations we study pattern and aging during coarsening in nonconserved nearest neighbor Ising model, following quenches from infinite to zero temperature, in spac…
Kinetics of Ferromagnetic Ordering in 3D Ising Model: Do we understand the case of zero temperature quench?
Subir K. Das, Saikat Chakraborty
We study phase ordering dynamics in the three-dimensional nearest-neighbor Ising model, following rapid quenches from infinite to zero temperature. Results on various aspects, viz.…
The Role of Percolation and Sheet Dynamics during Heat Conduction in poly-dispersed Graphene Nanofluids
Purbarun Dhar, Arvind Pattamatta, Sarit K. Das
A thermal transport mechanism leading to the enhanced thermal conductivity of Graphene nanofluids has been proposed. The Graphene sheet size is postulated to be the key to the unde…
Fractality in Persistence Decay and Domain Growth during Ferromagnetic Ordering: Dependence upon initial correlation
Saikat Chakraborty, Subir K. Das
Dynamics of ordering in Ising model, following quench to zero temperature, have been studied via Glauber spin-flip Monte Carlo simulations in space dimensions and . One of…
Persistence in Ferromagnetic Ordering: Dependence upon initial configuration
Saikat Chakraborty, Subir K. Das
We study the dynamics of ordering in ferromagnets via Monte Carlo simulations of the Ising model, employing the Glauber spin-flip mechanism, in space dimensions and . Resu…