Zobrazeno 1 - 10
of 335
pro vyhledávání: '"Roy, Amlan"'
The present contribution constitutes a brief account of information theoretical analysis in several representative model as well as real quantum mechanical systems. There has been an overwhelming interest to study such measures in various quantum sys
Externí odkaz:
http://arxiv.org/abs/2401.02645
Autor:
Nath, Debraj, Roy, Amlan K.
Publikováno v:
Int. J. Quant. Chem. 121, e26616 (2021)
Accurate solution of the Schr\"odinger equation with Deng-Fan potential is presented by means of Nikiforov-Uvarov method. A modified Pekeris-type approximation is proposed for the centrifugal term, from a linear combination of the $r \to 0$ and $r \t
Externí odkaz:
http://arxiv.org/abs/2205.09590
Autor:
Majumdar, Sangita, Roy, Amlan K.
Publikováno v:
Int. J. Quant. Chem. 121, e26630 (2021)
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 approach to pursue both ground and excited states of a multi-electron at
Externí odkaz:
http://arxiv.org/abs/2205.09581
Publikováno v:
Eur. Phys. J. D 75, 86 (2021)
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 exchange potential. The exchange-only results are of near Hartree-Fock q
Externí odkaz:
http://arxiv.org/abs/2205.10314
Autor:
Nath, Debraj, Roy, Amlan K.
Publikováno v:
Eur. Phys. J. Plus 136, 430 (2021)
Two physically important potentials (Manning-Rosen and P\"oschl-Teller) are considered for the ro-vibrational energy in diatomic molecules. An improved new approximation is invoked for the centrifugal term, which is then used for their solution withi
Externí odkaz:
http://arxiv.org/abs/2205.10313
Autor:
Ghosal, Abhisek, Roy, Amlan K.
Publikováno v:
Mol. Phys. 120, e1983056 (2021)
In this communication, we represent a self-consistent systematic optimization procedure for the development of optimally tuned (OT) range-separated hybrid (RSH) functionals from \emph{first principles}. This is an offshoot of our recent work, which e
Externí odkaz:
http://arxiv.org/abs/2205.11250
Publikováno v:
Phys. Rev. A 104, 012803 (2021)
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 in temperature is impacted with a change in confinement radius $(r_{c
Externí odkaz:
http://arxiv.org/abs/2205.09531
Autor:
Ghosal, Abhisek, Roy, Amlan K.
Publikováno v:
Chem. Phys. Lett. 796, 139562 (2022)
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 introduces a second-order split operator technique in energy representation to
Externí odkaz:
http://arxiv.org/abs/2205.09118
Autor:
Nath, Debraj, Roy, Amlan K.
Publikováno v:
Chem. Phys. Lett. 780, 138909 (2021)
Analytical solutions are presented for eigenvalues, eigenfunctions of {\color{red} D-dimensional Schrodinger equation having Eckart potential} within Nikiforov-Uvarov method. This uses a new, improved approximation for centrifugal term, from a combin
Externí odkaz:
http://arxiv.org/abs/2205.09024