Jayanta K. Saha
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An algorithm for automated extraction of resonance parameters from the stabilization method Open
The application of the stabilization method [A.~U.\ Hazi and H.~S.\ Taylor, Phys.~Rev.~A {\bf 1}, 1109 (1970)]) to extract accurate energy and lifetimes of resonance states is challenging: The process requires labor-intensive numerical man…
An Algorithm for Automated Extraction of Resonance Parameters from the Stabilization Method Open
The application of the stabilization method [A.~U.\ Hazi and H.~S.\ Taylor, Phys.~Rev.~A {\bf 1}, 1109 (1970)]) to extract accurate energy and lifetimes of resonance states is challenging: The process requires labor-intensive numerical man…
Shannon entropy as an indicator for the orbital shape manipulation of a hydrogen atom under a repulsive single barrier potential Open
The effect of a penetrable repulsive single-barrier potential on the structural properties of hydrogen atom in ground and different excited (n,l) states [n=1-3, l=0-2] is studied. The Lagrange mesh method is adopted to solve the correspond…
Bound and resonance states of highly charged H‐ and He‐like ions under weakly coupled plasma environment Open
The position of bound () states as well as doubly excited resonance , () states of symmetry has been determined for highly charged He‐like ions (, , , , , and Ar 16+ ) along with their respective one‐electron thresholds (, , and ) under we…
Azimuthal phase-dependent electromagnetically induced transparency and the generation of spatial light in a microwave-assisted four-level Y-type system Open
We present an azimuthal phase-dependent scheme to study the spatially dependent electromagnetically induced transparency (EIT) and the generation of spatial light in a closed-loop four-level Y-type system. A structured control beam and a m…
Stability of a two-electron system under pressure confinement: structural and quantum information theoretical analysis Open
The stability of a two-electron Zee system trapped inside an impenetrable spherical cavity is analyzed using an explicitly correlated multi-exponent Hylleraas-type basis set in the framework of the Ritz variational method. The wave functio…
Information theoretic measures on the two-photon transitions of hydrogen atom embedded in weakly coupled plasma environment Open
The quantum information theoretic measures in terms of Shannon entropy and Fisher entropy (both in position and momentum spaces) on the ground, excited as well as virtual states arising out of the two-photon transitions (1 s → nl ; n = 2 −…
Stabilization method with the relativistic configuration-interaction calculation applied to two-electron resonances Open
We applied a relativistic configuration-interaction (CI) framework to the\nstabilization method as an approach for obtaining the autoionization resonance\nstructure of heliumlike ions. In this method, the ion is confined within an\nimpenet…
Resonance States of Hadronic Three-Body Ions: Stabilization Method Open
Bound and resonance states of symmetric three-body exotic \(pXX\) negative atomic ions \((X=\mu^{-}, \pi^{-}, K^{-})\) as well as exotic \(ppX\) positive molecular ions for total angular momentum \(J=0\), are studied in details under the f…
Corrigendum: Critical stability and quantum phase transition of screened two‐electron system Open
This article corrects the following: Sadhukhan, A, Dutta, S, Saha, JK. Critical stability and quantum phase transition of screened two-electron system. Int J Quantum Chem. 2019;e26042. https://doi.org/10.1002/qua.26042 A bug in the code wa…
\(Ps^−\) and \(H^+_2\) Ions under Spatial Confinement Open
The ground state energy eigenvalues of the spatially confined symmetric three-body exotic ions \(Ps^-\) and \(H^+_2\) have been determined under the framework of Rayleigh-Ritz variational method. The spatial confinement is simulated by con…
Doubly Excited Resonance States of Helium Atom: Complex Entropies Open
We provide a diagonal form of a reduced density matrix of S-symmetry resonance states of two electron systems determined under the framework of the complex scaling method. We have employed the variational Hylleraas type wavefunction to est…
Electronic Structure of Helium Atom in a Quantum Dot Open
Bound and resonance states of helium atom have been investigated inside a quantum dot by using explicitly correlated Hylleraas type basis set within the framework of stabilization method. To be specific, precise energy eigenvalues of bound…