34 citations · 129 across the 12 of their papers we have counts for
12 papers
Quantum dynamics in confined pseudo-harmonic oscillator in a time-dependent moving
Akash Halder, Amlan K. Roy, Debraj Nath
In this work, we present analytical solution of Schrödinger equation of confined pseudoharmonic potential in presence of a moving boundary condition, for an arbitrary angular momen…
Confined H ion within a density functional framework
Sangita Majumdar, Neetik Mukherjee, Amlan K. Roy
Ground and excited states of a confined negative Hydrogen ion has been pursued under Kohn-Sham density functional approach by invoking a physically motivated work-function-based ex…
Ro-vibrational energy analysis of Manning-Rosen and Pöschl-Teller potentials with a new improved approximation in the centrifugal term
Debraj Nath, Amlan K. Roy
Two physically important potentials (Manning-Rosen and Pöschl-Teller) are considered for the ro-vibrational energy in diatomic molecules. An improved new approximation is invoked f…
Ro-vibrational energy and thermodynamic properties of molecules subjected to Deng-Fan potential through an improved approximation
Debraj Nath, Amlan K. Roy
Accurate solution of the Schrödinger equation with Deng-Fan potential is presented by means of Nikiforov-Uvarov method. A modified Pekeris-type approximation is proposed for the ce…
Density functional study of atoms spatially confined inside a hard sphere
Sangita Majumdar, Amlan K. Roy
An atom placed inside a cavity of finite dimension offers many interesting features, and thus has been a topic of great current activity. This work proposes a density functional ap…
A self-consistent systematic optimization of range-separated hybrid functionals from first principles
Abhisek Ghosal, Amlan K. Roy
In this communication, we represent a self-consistent systematic optimization procedure for the development of optimally tuned (OT) range-separated hybrid (RSH) functionals from \e…
Hydrogen-like ions in plasma environment
Neetik Mukherjee, Chandra Nath Patra, Amlan K. Roy
The behavior of H-like ions embedded in astrophysical plasmas in the form of \emph{dense, strongly and weakly coupled} plasmas are investigated. In these, the increase and decrease…
A real-time TDDFT scheme for strong-field interaction in Cartesian coordinate grid
Abhisek Ghosal, Amlan K. Roy
In this communication, we present a new approach towards RT-TDDFT through time-dependent KS equations based on an \emph{adiabatic eigenstate subspace} (AES) procedure. It introduce…
Analytical solution of dimensional Schrödinger equation for Eckart potential with a new improved approximation in centrifugal term
Debraj Nath, Amlan K. Roy
Analytical solutions are presented for eigenvalues, eigenfunctions of {\color{red} D-dimensional Schrodinger equation having Eckart potential} within Nikiforov-Uvarov method. This…
Shell-confined atom and plasma: incidental degeneracy, metallic character and information entropy
Neetik Mukherjee, Amlan K. Roy
Shell confined atom can serve as a generalized model to explain both \emph{free} and \emph{confined} condition. In this scenario, an atom is trapped inside two concentric spheres o…
Density functional electric response properties of molecules in Cartesian grid
Abhisek Ghosal, Tanmay Mandal, Amlan K. ~Roy
Within the finite-field Kohn-Sham framework, static electric response properties of diatomic molecules are presented. The electronic energy, dipole moment ({\boldmath}), static…
Accurate calculation of the bound states of Hellmann potential
Amlan K. Roy
Bound states of the Hellmann potential, which is a superposition of the attractive Coulomb () and the Yukawa () potential, are calculated by using a generalized p…