Explanipedia

Entropy production and statistical relaxation of dipolar bosons and fermions in interaction quench dynamics Open

Barnali Chakrabarti, N. D. Chavda, Frederico V. Prudente · 2025

We study the out-of-equilibrium dynamics of dipolar bosons and fermions after a sudden change in the interaction strength from zero to a finite repulsive value. We simulate the interaction quench on the initial state which is the ground st…

Photoabsorption and Photoionization of Acetaldehyde in the 10.8–21.4 eV Range Open

Bruno Credidio, M. G. P. Homem, Ricardo R. T. Marinho, Frederico V. Prudente · 2025

Informational Entropy Analysis of Artificial Helium Atoms Open

Marcílio N. Guimarães, Rafael N. Cordeiro, Wallas S. Nascimento, Frederico V. Prudente · 2025

We use the Shannon informational entropies as a tool to study the artificial helium atom, namely, two electrons confined in a quantum dot. We adopt configurations with spherical and cylindrical symmetries for the physical system of interes…

Photoabsorption and Photoionization Cross-Sections and Asymmetry Parameters of Pyrrole in the Vacuum-Ultraviolet Energy Range Open

Maria Olívia Sobral Fraga de Medeiros, Josenilton N. Sousa, Manuela S. Arruda, M. M. Fujimoto, M. G. P. Homem , et al. · 2025

We carried out a joint experimental and theoretical investigation of the interaction of vacuum-ultraviolet radiation with pyrrole molecules in the gas phase. A double-ion chamber spectrometer was used to measure the absolute photoabsorptio…

Structure and Thermodynamics of Li+Arn Clusters beyond the Second Solvation Shell Open

J. M. C. Marques, Frederico V. Prudente · 2024

Small Li+Arn clusters are employed in this work as model systems to study microsolvation. Although first and second solvation shells are expected to be the most relevant ones for this type of atomic solvents, it is also interesting to expl…

Informational Analysis of the Confinement of an Electron in an Asymmetric Double Quantum Dot Open

Wallas S. Nascimento, A M Maniero, Frederico V. Prudente, Carlos R. de Carvalho, Ginette Jalbert · 2024

Electron Confinement study in a double quantum dot by means of Shannon Entropy Information Open

Wallas S. Nascimento, A M Maniero, Frederico V. Prudente, Carlos R. de Carvalho, Ginette Jalbert · 2023

In this work, we use the Shannon informational entropies to study an electron confined in a double quantum dot; we mean the entropy in the space of positions, $S_r$, in the space of momentum, $S_p$, and the total entropy, $S_t = S_r+S_p$. …

A Study of Strong Confinement Regions Using Informational Entropy Open

Ademir de J. Santos, Frederico V. Prudente, Marcílio N. Guimarães, Wallas S. Nascimento · 2022

We present an informational study of a spherically confined hydrogen atom, a hydrogenic ion confined in a strongly coupled plasma, a spherically confined harmonic oscillator, and a particle confined in a cage. For this, we have implemented…

Intermolecular Forces: From Atoms and Molecules to Nanostructures Open

J. M. C. Marques, Frederico V. Prudente, Fernando Pirani · 2022

Intermolecular forces, determined by the critical balance of interacting components having physical and chemical natures, control most of the static and dynamic properties of matter such as their existence in solid, liquid and gaseous phas…

Thermodynamic Signatures of Structural Transitions and Dissociation of Charged Colloidal Clusters: A Parallel Tempering Monte Carlo Study Open

Frederico V. Prudente, J. M. C. Marques · 2022

Computational simulation of colloidal systems make use of empirical interaction potentials that are founded in well-established theory. In this work, we have performed parallel tempering Monte Carlo (PTMC) simulations to calculate heat cap…

A variational R-matrix finite element procedure for solving ultra-cold collision problems Open

Marcílio N. Guimarães, Frederico V. Prudente · 2021

Coulomb correlation and information entropies in confined helium-like atoms Open

Wallas S. Nascimento, Marina de Godoy Almeida, Frederico V. Prudente · 2021

On the oscillating properties of a two-electron quantum dot in the presence of a magnetic field Open

A M Maniero, Carlos R. de Carvalho, Frederico V. Prudente, Ginette Jalbert · 2021

We give a basic explanation for the oscillating properties of some physical quantities of a two-electron quantum dot in the presence of a static magnetic field. This behaviour was discussed in a previous work of ours (Maniero et al 2020 J.…

A thermodynamic view on the microsolvation of ions by rare gas: application to Li<sup>+</sup> with argon Open

Marcílio N. Guimarães, Marina de Godoy Almeida, J. M. C. Marques, Frederico V. Prudente · 2020

Parallel tempering Monte Carlo calculations on the Li⁺Ar_n microsolvation clusters have shown that the two peaks appearing in the heat capacity curve as a function of temperature correspond to the melting of the second…

Photoabsorption and Photoionization Cross Sections of Pyridine in the Vacuum-Ultraviolet Energy Range Open

Josenilton N. Sousa, Leonardo C. Ribeiro, Manuela S. Arruda, M. G. P. Homem, Hiroki Tanaka , et al. · 2019

We have performed an experimental investigation into the interaction of vacuum-ultraviolet synchrotron radiation with pyridine molecules in the gas phase. Specifically, a double-ion chamber spectrometer was used to measure the absolute pho…

Modified information entropies in one-dimensional quantum systems Open

Wallas S. Nascimento, Marina de Godoy Almeida, Frederico V. Prudente · 2019

The present research offers a connection between information and quantum theories considering, as a bridge, the informational entropy. The information theory is explored as originally developed and links with the quantum theory are investi…

Correction: Solvation of Li<sup>+</sup> by argon: how important are three-body forces? Open

Frederico V. Prudente, J. M. C. Marques, Francisco B. Pereira · 2018

Correction for ‘Solvation of Li⁺ by argon: how important are three-body forces?’ by Frederico V. Prudente et al., Phys. Chem. Chem. Phys., 2017, 19, 25707–25716.

Shannon entropy: A study of confined hydrogenic-like atoms Open

Wallas S. Nascimento, Frederico V. Prudente · 2017

Determination of the scattering length for Rb-Cs X$^{1}\Sigma ^{+}$ ground electronic state using a variational method Open

Marcílio N. Guimarães, Frederico V. Prudente · 2017

We performed the calculation of the scattering length for the elastic collision between the rubidium and cesium atoms. For this we applied a variational procedure based on the R-matrix theory for unbound states employing the finite element…

STUDY OF SHANNON ENTROPY IN THE CONTEXT OF QUANTUM MECHANICS: AN APPLICATION TO FREE AND CONFINED HARMONIC OSCILLATOR Open

Wallas S. Nascimento, Frederico V. Prudente · 2016

The aim of this study was a didactic presentation of the Shannon entropy in the quantum theory context, followed by application to the case of a one-dimensional harmonic oscillator in its ground state, both in the free case and confined ca…

O método do elemento finito aplicado ao estudo de colisões atômicas e moleculares Open

Marcílio N. Guimarães, Frederico V. Prudente · 2015

Este trabalho tem como objetivo desenvolver e aplicar um método teórico e computacional eficiente para o estudo quântico não-relativístico de colisões atômicas e moleculares. O método é baseado no formalismo variacional da matriz R e no mé…

Angular Momentum Coupling and Discrete Quantum Mechanics: the 10-Spin Network, the Pentagonal Relationship, an Eigenvalue Equation and Semiclassical Limits Open

Robenilson F. Santos, Mirco Ragni, Ana Carla P. Bitencourt, Frederico V. Prudente, Vincenz̊o Aquilanti · 2015

The Confined Helium Atom in Hyperspherical Coordinates Open

Marcílio N. Guimarães, Frederico V. Prudente · 2015

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