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We study the optical properties of gapped graphene in presence of a magnetic field. We consider a model based on the Dirac equation, with a gap introduced via a mass term, for which analytical expressions for the diagonal and Hall optical…

Mesoscale and Nanoscale Physics · Physics 2011-09-30 Jesper Goor Pedersen , Thomas Garm Pedersen

In a recent study on monopole production [Eur. Phys. J. C (2018) 78: 966], Baines et al added the potential of a magnetic dipole to the Wu-Yang potentials for the Dirac monopole and claimed that this modified Wu-Yang configuration does not…

High Energy Physics - Phenomenology · Physics 2019-03-01 Ricardo Heras

We show that in the Maxwell-Chern-Simons theory of topologically massive electrodynamics the Dirac string of a monopole becomes a cone in anti-de Sitter space with the opening angle of the cone determined by the topological mass which in…

General Relativity and Quantum Cosmology · Physics 2009-10-31 A. N. Aliev , Y. Nutku , K. Saygılı

Unified theories of strong, weak and electromagnetic interactions which have electric charge quantization predict the existence of topologically stable magnetic monopoles. Intermediate scale monopoles are comparable with detection energies…

High Energy Physics - Phenomenology · Physics 2017-12-06 Thomas W. Kephart , George K. Leontaris , Qaisar Shafi

Magnetic monopoles have eluded experimental detection since their prediction nearly a century ago by Dirac. Recently it has been shown that classical analogues of these enigmatic particles occur as excitations out of the topological ground…

Statistical Mechanics · Physics 2010-11-23 Ludovic D. C. Jaubert , Peter C. W. Holdsworth

This short article sets out some of the basic considerations that go into detecting the mass of quasiparticles with effective magnetic charge in solids. Effective magnetic charges may be appear as defects in particular magnetic textures. A…

Strongly Correlated Electrons · Physics 2017-11-01 N. P. Armitage

Within the context of infinite-dimensional representations of the rotation group the Dirac monopole problem is studied in details. Irreducible infinite-dimensional representations, being realized in the indefinite metric Hilbert space, are…

High Energy Physics - Theory · Physics 2013-04-30 Alexander I. Nesterov , Fermin Aceves de la Cruz

The Dirac equation for an electron in two spatial dimensions in the Coulomb and homogeneous magnetic fields is discussed. For weak magnetic fields, the approximate energy values are obtained by semiclassical method. In the case with strong…

Quantum Physics · Physics 2009-11-06 Choon-Lin Ho , V. R. Khalilov

The purpose of this paper is to show that, under certain restrictions, we can take a Dirac-Aharonov-Bohm potential as a pure gauge field. We argue that a modified quantization condition comes out for the electric charge that may open up the…

Quantum Physics · Physics 2007-05-23 F. A. Barone , J. A. Helayel-Neto

A theory containing both electric and magnetic charges is formulated using two vector potentials, $A_{\mu}$ and $C_{\mu}$. This has the aesthetic advantage of treating electric and magnetic charges both as gauge charges, but it has the…

High Energy Physics - Theory · Physics 2007-05-23 Douglas Singleton

Classical solutions of equations of motion in low energy effective field theory, describing fundamental charged heterotic string, are found. These solutions automatically carry an electric current equal to the charge per unit length, and…

High Energy Physics - Theory · Physics 2009-09-15 Ashoke Sen

We consider the system of massive electrons, possessing nonzero anomalous magnetic moments, which electroweakly interact with background neutrons under the influence of an external magnetic field. The Dirac equation for such electrons is…

High Energy Astrophysical Phenomena · Physics 2017-12-27 Maxim Dvornikov

A concise discussion of the 3-dimensional irreducible (1,0) and (0,1) representations of the restricted Lorentz group and their application to the description of the electromagnetic field is given. It is shown that a mass term is in…

Mathematical Physics · Physics 2013-02-15 Andreas Aste

The full ``classical" Dirac-Maxwell equations are considered under various simplifying assumptions. A reduction of the equations is performed in the case when the Dirac field is {\em static} and a further reduction is performed in the case…

High Energy Physics - Theory · Physics 2010-11-19 Chris Radford

Magnetic monopoles have attracted the attention of physicists since the founding of the electromagnetic theory. Their search has been a constant endeavor which was intensified when Dirac established the relation between the existence of…

High Energy Physics - Phenomenology · Physics 2009-08-05 Luis N. Epele , Huner Fanchiotti , Carlos A. Garcia Canal , Vicente Vento

We obtain exact solution of the Dirac equation for a charged particle with position-dependent mass in the Coulomb field. The effective mass of the spinor has a relativistic component which is proportional to the square of the Compton…

Mathematical Physics · Physics 2009-11-10 A. D. Alhaidari

We investigate the Cabbibo-Ferrari, two potential approach to magnetic charge coupled to two different complex scalar fields, $\Phi_1$ and $\Phi_2$, each having different electric and magnetic charges. The scalar field, $\Phi_1$, is assumed…

Dirac showed that the existence of one magnetic pole in the universe could offer an explanation for the discrete nature of the electric charge. Magnetic poles appear naturally in most Grand Unified Theories. Their discovery would be of…

High Energy Physics - Phenomenology · Physics 2008-11-26 Luis N. Epele , Huner Fanchiotti , Carlos A. Garcia Canal , Vicente Vento

We construct the multi-charge generalizations for the electroweak magnetic monopole solution of Cho and Maison within a wide range of values of the magnetic charge. We use the same ansatz for the axially symmetric fields as the one…

High Energy Physics - Theory · Physics 2023-03-01 Romain Gervalle , Mikhail S. Volkov

In Refs.[1-4] Dirac and Schwinger showed the existence of a magnetic monopole required a charge quantization condition which we write following Dirac as $\frac{eg}{4\pi\hbar}=\frac{n}{2},\; n=0,\pm 1,\; \pm 2, \ldots$. Here, $g$ is the…

Strongly Correlated Electrons · Physics 2025-05-06 A. Farhan , M. Saccone , B. F. L. Ward