105 citations · 336 across the 21 of their papers we have counts for
21 papers
Identifying mobility edge from finite temperature spectral form factor
Basudha Roy, Anandamohan Ghosh, Adway Kumar Das
The spectral form factor (SFF) is a measure of energy correlations and has been widely used to identify the transition from the ergodic to the localized phase in interacting many-b…
Signatures of Nonergodicity in Sparse Random Matrices
Sagnik Seth, Adway Kumar Das, Anandamohan Ghosh
The prevalence of sparsity in the Fock space graph of interacting many-body systems motivates an investigation into the spectral statistics of sparse random matrices with on-site d…
Anomalous energy correlations and spectral form factor in the nonergodic phase of the -ensemble
Basudha Roy, Adway Kumar Das, Anandamohan Ghosh +1
The -ensemble is a prototypical model of a single particle system on a one-dimensional disordered lattice with inhomogeneous nearest neighbor hopping. Corresponding nonergodic p…
Spectral form factor and energy correlations in banded random matrices
Adway Kumar Das, Anandamohan Ghosh, Lea F. Santos
Banded random matrices were introduced as a more realistic alternative to full random matrices for describing the spectral statistics of heavy nuclei. Initially considered by Wigne…
Emergent multifractality in power-law decaying eigenstates
Adway Kumar Das, Anandamohan Ghosh, Ivan M. Khaymovich
Eigenstate multifractality is of significant interest with potential applications in various fields of quantum physics. Most of the previous studies concentrated on fine-tuned quan…
Robust non-ergodicity of ground state in the ensemble
Adway Kumar Das, Anandamohan Ghosh, Ivan M. Khaymovich
In various chaotic quantum many-body systems, the ground states show non-trivial athermal behavior despite the bulk states exhibiting thermalization. Such athermal states play a cr…
Absence of Mobility Edge in Short-range Uncorrelated Disordered Model: Coexistence of Localized and Extended States
Adway Kumar Das, Anandamohan Ghosh, Ivan M. Khaymovich
Unlike the well-known Mott's argument that extended and localized states should not coexist at the same energy in a generic random potential, we provide an example of a nearest-nei…
Transport in deformed centrosymmetric networks
Adway Kumar Das, Anandamohan Ghosh
Centrosymmetry often mediates Perfect State Transfer (PST) in various complex systems ranging from quantum wires to photosynthetic networks. We introduce the Deformed Centrosymmetr…
Chaos due to symmetry-breaking in deformed Poisson ensemble
Adway Kumar Das, Anandamohan Ghosh
The competition between strength and correlation of coupling terms in a Hamiltonian defines numerous phenomenological models exhibiting spectral properties interpolating between th…
Non-ergodic extended states in -ensemble
Adway Kumar Das, Anandamohan Ghosh
Matrix models showing chaotic-integrable transition in the spectral statistics are important for understanding Many Body Localization (MBL) in physical systems. One such example is…
Dynamical Signatures of Chaos to Integrability Crossover in Generalized Random Matrix Ensembles
Adway Kumar Das, Anandamohan Ghosh
We introduce a two-parameter ensemble of generalized real symmetric random matrices called the -Rosenzweig-Porter ensemble (\brpe), parameterized by , a fictitiou…
Eigenvalue Statistics for Generalized Symmetric and Hermitian Matrices
Adway Kumar Das, Anandamohan Ghosh
The Nearest Neighbour Spacing (NNS) distribution can be computed for generalized symmetric 2x2 matrices having different variances in the diagonal and in the off-diagonal elements.…
Dynamical Systems Analysis of K-essence Model
Abhijit Chakraborty, Anandamohan Ghosh, Narayan Banerjee
In the present work we investigate the stability of the k-essence models allowing upto quadratic terms of the kinetic energy. The system of field equations is written as an autonom…
Thawing vs. Tracker Solutions: A Dynamical Systems Approach
Abhijit Chakraborty, Narayan Banerjee, Anandamohan Ghosh
A comparative study of thawing and tracking models of dark energy is carried out with the help of a dynamical systems analysis. It is found that both of them have stable solutions…
Localization of weakly interacting Bose gas in quasiperiodic potential
Sayak Ray, Mohit Pandey, Anandamohan Ghosh +1
We study the localization properties of weakly interacting Bose gas in a quasiperiodic potential commonly known as Aubry-André model. Effect of interaction on localization is inves…
Retinal adaptation and invariance to changes in higher-order stimulus statistics
Gašper Tkačik, Anandamohan Ghosh, Elad Schneidman +1
Adaptation in the retina is thought to optimize the encoding of natural light signals into sequences of spikes sent to the brain. However, adaptation also entails computational cos…
Relaxation dynamics of the Kuramoto model with uniformly distributed natural frequencies
Anandamohan Ghosh, Shamik Gupta
The Kuramoto model describes a system of globally coupled phase-only oscillators with distributed natural frequencies. The model in the steady state exhibits a phase transition as…
On the orientational ordering of long rods on a lattice
Anandamohan Ghosh, Deepak Dhar
We argue that a system of straight rigid rods of length k on square lattice with only hard-core interactions shows two phase transitions as a function of density, rho, for k >= 7.…
Random trimer tilings
Anandamohan Ghosh, Deepak Dhar, Jesper Lykke Jacobsen
We study tilings of the square lattice by linear trimers. For a cylinder of circumference m, we construct a conserved functional of the base of the tilings, and use this to block-d…
Parameter estimation in spatially extended systems: The Karhunen-Loeve and Galerkin multiple shooting approach
Anandamohan Ghosh, V. Ravi Kumar, B. D. Kulkarni
Parameter estimation for spatiotemporal dynamics for coupled map lattices and continuous time domain systems is shown using a combination of multiple shooting, Karhunen-Loeve decom…
Stationary localized states due to quadratic nonlinearity in one dimensional systems
Anandamohan Ghosh, B. C. Gupta, K. Kundu
We investigate the effect of a nondegenerate quadratic nonlinear dimeric impurity on the formation of stationary localized states in one dimensional systems. We also consider the f…