14 citations · 55 across the 15 of their papers we have counts for
15 papers
Excitonic Condensation in an Asymmetric Electron-Hole Biwire
Gautam Shah, Vinod Ashokan, N. D. Drummond +1
We study a mass-asymmetric one-dimensional electron-hole biwire system at zero temperature using the diffusion quantum Monte Carlo method. Pair correlation functions and condensate…
Effective and Floquet Hamiltonians for High Frequency Driving and Floquet-induced Heating in Quantum Spin Chains
Mayukh Bandyopadhyay, Vinod Ashokan
We study the non-equilibrium dynamics of a disordered periodically driven quantum spin chain, with the competition between the interaction, disorder, and Floquet driving being of p…
Many body localization in Disordered One-Dimensional Fermi-Hubbard Model
Harmanjeet Kaur, Vinod Ashokan
We investigate the non-equilibrium dynamics of the disordered one-dimensional Fermi-Hubbard model with a focus on many-body localization. The system is initialized in a charge-dens…
Adiabatic Ramp Dynamics Across the ETH--MBL Transition in Disordered XXZ Spin Chain
Nidhi Kumari, Vinod Ashokan
Many-body localization(MBL) provides a mechanism by which isolated interacting quantum systems with disorder can avoid thermalization unlike ergodic systems satisfying the eigensta…
Correlation effects in one-dimensional metallic quantum wires under various confinements
Vidit Gangwar, Vinod Ashokan, Ankush Girdhar +3
Dynamical response theory is used to investigate various transverse confinements on electron correlations in the ground state of a ferromagnetic one-dimensional quantum wire for di…
Electronic quantum wires in extended quasiparticle picture
Klaus Morawetz, Vinod Ashokan, Kare Narain Pathak +2
A one-dimensional quantum wire of Fermions is considered and ground state properties are calculated in the high density regime within the extended quasiparticle picture and Born ap…
Off-shell selfenergy for 1-D Fermi liquids
Klaus Morawetz, Vinod Ashokan, Kare Narain Pathak +1
The selfenergy in Born approximation including exchange of interacting one-dimensional systems is expressed in terms of a single integral about the potential which allows a fast an…
Wire width and density dependence of the crossover in the peak of the static structure factor from in one-dimensional paramagnetic electron gases
Ankush Girdhar, Vinod Ashokan, Rajesh O. Sharma +2
We use the variational quantum Monte Carlo (VMC) method to study the wire width () and electron density () dependences of the ground-state properties of quasi-one-di…
Electron correlation and confinement effects in quasi-one-dimensional quantum wires at high density
Ankush Girdhar, Vinod Ashokan, N. D. Drummond +2
We study the ground-state properties of ferromagnetic quasi-one-dimensional quantum wires using the quantum Monte Carlo (QMC) method for various wire widths and density paramet…
Ground-state properties of electron-electron biwire systems
Rajesh O. Sharma, N. D. Drummond, Vinod Ashokan +2
The correlation between electrons in different quantum wires is expected to affect the electronic properties of quantum electron-electron biwire systems. Here, we use the variation…
Sublattice magnetizations of ultrathin ferrimagnetic lamellar nanostructures between cobalt leads
Vinod Ashokan, A. Khater, M. Abou Ghantous
In this work we model the salient magnetic properties of the alloy lamellar ferrimagnetic nanostructures bet…
Exact ground-state properties of one-dimensional electron gas at high density
Vinod Ashokan, Renu Bala, Klaus Morawetz +1
The dynamical response theory is used to obtain an analytical expression for the exchange energy of a quantum wire for arbitrary polarization and width. It reproduces the known for…
One-dimensional electron fluid at high density
Vinod Ashokan, N. D. Drummond, K. N. Pathak
We calculate the ground-state energy, pair correlation function, static structure factor, and momentum density of the one-dimensional electron fluid at high density using variation…
Conditions where RPA becomes exact in the high-density limit
Klaus Morawetz, Vinod Ashokan, Renu Bala +1
It is shown that in -dimensional systems, the vertex corrections beyond the random phase approximation (RPA) or GW approximation scales with the power of the Fermi momen…
Dependence of structure factor and correlation energy on the width of electron wires
Vinod Ashokan, Renu Bala, Klaus Morawetz +1
The structure factor and correlation energy of a quantum wire of thickness are studied in random phase approximation and for the less investigated region . Using…