15,614 research outputs found
Charged branes interactions via Kalb-Ramond field
Because of its versatility, the 2-form field has been employed to describe a
multitude of scenarios that range from high energy to condensed matter physics.
Pushing forward in this endeavor we study the interaction energy, intermediated
by this kind of field, between branes in a variety of configurations. Also, the
so-called Cremmer-Scherk-Kalb-Ramond model, which consists of the
electromagnetic field coupled to the Kalb-Ramond gauge potential, is
considered. It turns out that these models exhibit a much richer class of
sources than usually thought, able to intermediate novel forms of interactions
in different scenarios.Comment: 12 latex pages, more general result
A Conducting surface in Lee-Wick electrodynamics
The Lee-Wick electrodynamics in the vicinity of a conducting plate is
investigated. The propagator for the gauge field is calculated and the
interaction between the plate and a point-like electric charge is computed. The
boundary condition imposed on the vector field is taken to be the one that
vanishes, on the plate, the normal component of the dual field strength to the
plate. It is shown that the image method is not valid in Lee-Wick
electrodynamics.Comment: 11 pages, 1 figur
Field theoretic description of electromagnetic boundaries: The Casimir effect between dissimilar mirrors from external potentials
In a previous work we formulated a model of semitransparent dielectric
surfaces, coupled to the electromagnetic field by means of an effective
potential. Here we consider a setup with two dissimilar mirrors, and compute
exactly the correction undergone by the photon propagator due to the presence
of both plates. It turns out that this new propagator is continuous all over
the space and, in the appropriate limit, coincides with the one used to
describe the Casimir effect between perfect conductors. The amended Green
function is then used to calculate the Casimir energy between the uniaxial
dielectric surfaces described by the model, and a numerical analysis is carried
out to highlight the peculiar behavior of the interaction between the mirrors.Comment: 7 pages, 3 figure
Path Integral and the Induction Law
We show how the induction law is correctly used in the path integral
computation of the free particle propagator. The way this primary path integral
example is treated in most textbooks is a little bit missleading.Comment: 5 latex pages, no figure
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