28 citations · 89 across the 20 of their papers we have counts for
20 papers
Dyons with phase
Ricardo Heras
In a recent paper (Heras in Eur. Phys. J. Plus 138: 329, 2023), we have demonstrated that when a dyon encircles an infinitely long solenoid enclosing electric and magnetic fluxes,…
The Aharonov-Bohm effect in a closed flux line
Ricardo Heras
The Aharonov-Bohm (AB) effect was convincingly demonstrated using a micro-sized toroidal magnet but it is almost always explained using an infinitely-long solenoid or an infinitely…
Topology, nonlocality and duality in classical electrodynamics
José A. Heras, Ricardo Heras
We have recently (Heras et al. in Eur. Phys. J. Plus 136:847, 2021) argued that classical electrodynamics can predict nonlocal effects by showing an example of a topological and no…
Can classical electrodynamics predict nonlocal effects?
José A. Heras, Ricardo Heras
Classical electrodynamics is a local theory describing local interactions between charges and electromagnetic fields and therefore one would not expect that this theory could predi…
Helmholtz's theorem for two retarded fields and its application to Maxwell's equations
José A. Heras, Ricardo Heras
An extension of the Helmholtz theorem is proved, which states that two retarded vector fields and satisfying appropriate initial and boundary conditions are…
On Feynman's handwritten notes on electromagnetism and the idea of introducing potentials before fields
José A. Heras, Ricardo Heras
In his recently discovered handwritten notes on "An alternate way to handle electrodynamics" dated on 1963, Richard P. Feynman speculated with the idea of getting the inhomogeneous…
The quantum phase of a dyon
Ricardo Heras
When a dyon encircles an infinitely-long solenoid enclosing uniform electric and magnetic fields, its wave function accumulates a duality-invariant quantum phase, which is topologi…
Comment on "Monopole production via photon fusion and Drell-Yan processes: MadGraph implementation and perturbativity via velocity-dependent coupling and magnetic moment as novel features"
Ricardo Heras
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 an…
The classical counterpart of the Aharonov-Bohm phase
Ricardo Heras
The existence of the Aharonov-Bohm phase shows that the magnetic field may produce nonlocal effects in quantum mechanics. It is generally believed that such a nonlocal behavior of…
Dirac quantisation condition: a comprehensive review
Ricardo Heras
In most introductory courses on electrodynamics, one is taught the electric charge is quantised but no theoretical explanation related to this law of nature is offered. Such an exp…
Dirac Quantization Condition Holds with Nonzero Photon Mass
Alfred Scharff Goldhaber, Ricardo Heras
Dirac in 1931 gave a beautiful argument for the quantization of electric charge, which required only the existence in the universe of one magnetic monopole, because gauge invarianc…
The Helmholtz theorem and retarded fields
Ricardo Heras
Textbooks frequently use the Helmholtz theorem to derive expressions for the electrostatic and magnetostatic fields but they do not usually apply this theorem to derive expressions…
Magnetorotational Instabilities and Pulsar Kick Velocities
Ricardo Heras
At the end of their birth process, neutron stars can be subject to a magnetorotational instability in which a conversion of kinetic energy of differential rotation into radiation a…
A review of Voigt's transformations in the framework of special relativity
Ricardo Heras
In 1887 Woldemar Voigt published the paper "On Doppler's Principle," in which he demanded covariance to the homogeneous wave equation in inertial reference frames, assumed the inva…
The wave equation in the birth of spacetime symmetries
Ricardo Heras
In 1887 Voigt published a paper dedicated to the Doppler effect in which he demanded form invariance to the wave equation in inertial frames and obtained a set of spacetime transfo…
Individualism: The legacy of great physicists
Ricardo Heras
A recent high school graduate addresses the salient question: Should individualism or collectivism be encouraged in physics students? (Physics Today, Points of View, October 2013)
Pulsars are Born as Magnetars
Ricardo Heras
This paper suggests the idea that all neutron stars experienced at birth an ultrafast decay of their magnetic fields from their initial values to their current surface values. If t…
Birth accelerations of neutron stars
Ricardo Heras
We suggest that neutron stars experienced at birth three related physical changes, which may originate in magneto-rotational instabilities: (i) an increase in period from the initi…
Initial accelerations of pulsars caused by external kicks
Ricardo Heras
Using energy conservation we show that if a sudden external force of unknown nature causes a newborn pulsar of mass and radius R=10 km to have the acceleration $a_0…
The magnetar origin of pulsars
Ricardo Heras
This paper suggests the idea that all neutron stars experienced at birth an ultrafast decay of their magnetic fields from their initial values to their current surface values. If t…