Kayama, Milton E. Michelin, Thiago J. Nascimento, Luiz C.
Published in
Brazilian Journal of Physics

The mapping of the magnetic field and analysis of the plasma resistivity were used to study the change of magnetic field topology during the formation of a reversed field configuration. Using a theta pinch with straight coil, the formation of the torus was observed during the early time of the plasma radial implosion, in scale comparable to Alfvén’...

Singh, Deobrat Kar, Supriya
Published in
Brazilian Journal of Physics

We revisit a non-perturbative formulation leading to a vacuum-created gravitational pair of (33̄)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$(3\bar {3})$\end{documen...

Assafrão, D. Favarato, C. C. Gonçalves, S. V. B. Simonelli, G.
Published in
Brazilian Journal of Physics

In this work, we consider the experiment of diffraction and interference of electrons through a double slit added to the Aharonov-Bohm phase effect. We applied the asymptotic Fresnel functions to one term of the interference process obtaining an expression for the intensity with divergence for certain values of the flow parameter. This led us to an...

Ferreira, C. J. S. Valverde, C. Baseia, B.
Published in
Brazilian Journal of Physics

In quantum optics, researchers usually study evolution of states starting from traditional ones: coherent, squeezed, Fock, and their superpositions. In a recent work (Ferreira et al. Int. J. Mod. Phys. B, 1850222, 2018), we discussed an example of ex- periment involving “atom”-field interaction allowing us to construct a list of field states inside...

Huang, Zhiming Zhang, Wei
Published in
Brazilian Journal of Physics

We investigate the dynamics of quantum coherence (QC) for a uniformly accelerated atom interacting with fluctuating electromagnetic field subject to a conductor boundary. We firstly derive the master equation that the atom evolution obeys. We find that without boundary, QC declines under the effect of Unruh thermal bath and vacuum fluctuation. Howe...

Eskalen, Hasan Özgan, Şükrü Okumuş, Mustafa Kerli, Süleyman
Published in
Brazilian Journal of Physics

In the original article Süleyman Kerli’s last name is incorrect. It is correct as reflected here.

Le, T. D.
Published in
Brazilian Journal of Physics

We report a newly updated constraint on space-time variation in the fine structure constant, α=e24πε0ℏc\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \alpha =\frac{e^...

Costa, B. V. Mól, L. A. S. Rocha, J. C. S.
Published in
Brazilian Journal of Physics

Topological phase transitions such as the Berezinskii-Kosterlitz-Thouless (BKT) transition are difficult to characterize due to the difficulty in defining an appropriate order parameter or to unravel its critical properties. In this paper, we discuss the application of a newly introduced numerical algorithm that was inspired by the Fisher zeros of ...

Yadav, Anil Kumar
Published in
Brazilian Journal of Physics

In this paper, we report the existence of transitioning scenario of Bianchi type I universe in the context of f (R,T) gravity with special case f (R,T) = f1(R) + f2(R)f3(T) and its functional forms f1(R) = f2(R) = R and f3(T) = αT with α being constant. The exact solution of the Einstein’s field equations is derived by using the generalized hybrid ...

Alam, M. S. Talukder, M. R.
Published in
Brazilian Journal of Physics

Unmagnetized collisionless plasma system consisting of positive and negative ions and electrons is considered to study the head-on collision of ion-acoustic shock and solitary waves (IASWs) and its effects on the formation of shock (monotonic and oscillatory) waves and phase shift. The soliton solution is derived from the two-sided Korteweg-de Vrie...