62,518 research outputs found
Duality Transformations and temperature inversion symmetry
We argue that the temperature inversion symmetry present in the original
Casimir setup and also in other Casimir systems for which symmetrical boundary
conditions are imposed is not related to the duality transformations that in
the context defined in Ref. [1] are transformations relating spatial extension
and temperature, and pressure and energy density. We provide an example of a
Casimir system for which in principle there is no temperature inversion
symmetry but nevertheless these duality transformations can be found.Comment: 5 pages, no figures, standard Late
A note on the Lorentz force, magnetic charges and the Casimir effect
We show that in order to account for the repulsive Casimir effect in the
parallel plate geometry in terms of the quantum version of the Lorentz force,
virtual surface densities of magnetic charges and currents must be introduced.
The quantum version of the Lorentz force expressed in terms of the correlators
of the electric and magnetic fields for planar geometries yields then correctly
the Casimir pressure.Comment: Simple latex file: six pages, no figure
On Gravitational Casimir Effect and Stefan-Boltzmann Law at Finite Temperature
Gravitons are described by the propagator in Teleparallel gravity in nearly
flat space-time. Finite temperature is introduced by using Thermo Field
Dynamics formalism. The Gravitational Casimir effect and Stefan-Boltzmann law
are calculated as a function of temperature. Then an equation of state for
gravitons is determined.Comment: 12 pages, accepted for publication in Advances in High Energy Physic
Convergences in the Measurement Problem in Quantum Mechanics
This paper presents arguments purporting to show that von Neumann's
description of the measurement process in quantum mechanics has a modern day
version in the decoherence approach. We claim that this approach and the de
Broglie-Bohm theory emerges from Bohr's interpretation and are therefore
obliged to deal with some obscures ideas which were antecipated, explicitly or
implicitly and carefully circumvented, by Bohr.Comment: 7 pages, no figure
Burgers Turbulence and the Continuous Spontaneous Localization Model
There is a striking convergence between Burgers turbulence and the continuous
spontaneous localization [CSL] model of quantum mechanics. In this paper, we
exploit this analogy showing the similarities in the physics of these two
apparently unrelated problems. It is hoped that the kind of analogy we
introduce here may lead to important developments in both areas.Comment: 15 pages, 2 figure
Quantized gravitoelectromagnetism theory at finite temperature
The Gravitoelectromagnetism (GEM) theory is considered in a lagrangian
formulation using the Weyl tensor components. A perturbative approach to
calculate processes at zero temperature has been used. Here the GEM at finite
temperature is analyzed using Thermo Field Dynamics, real time finite
temperature quantum field theory. Transition amplitudes involving gravitons,
fermions and photons are calculated for various processes. These amplitudes are
likely of interest in astrophysics.Comment: 18 page
A Beable Interpretation of the Continuous Spontaneous Localization Model
We extend the beable interpretation, due to Bell, to the continuous
spontaneous localization model (CSL). Results obtained by Vink are generalized
to the modified Schrodinger equation of Ghirardi, Pearle and Rimini (GPR),
which allows a beable interpretation for position and momentum.Comment: 7 pages, \revtex \tightenlines, no figures, revised versio
Gravitational Casimir effect at finite temperature
The energy-momentum tensor for the gravitoelectromagnetism (GEM) theory in
the real-time finite temperature field theory formalism is presented.
Expressions for the Casimir energy and pressure at zero and finite temperature
are obtained. An analysis of the Casimir effect for the GEM field is developed.Comment: 15 pages, title slightly changed, presentation improved. Version
accepted for publication in IJT
On G\"odel-type Solution in Rastall's Gravity
Rastall's theory is a generalization of Einstein's equations in which the
energy-momentum tensor is not a conserved quantity, its covariant derivative is
proportional to the gradient of the Ricci scalar and this fact can be
associated with quantum effects in curved space-time. In this work we will go
study the Rastall's gravity in the context of the G\"odel-type universe
Lorentz violation, Gravitoelectromagnetism and Bhabha Scattering at finite temperature
Gravitoelectromagnetism (GEM) is an approach for the gravitation field that
is described using the formulation and terminology similar to that of
electromagnetism. The Lorentz violation is considered in the formulation of GEM
that is covariant in its form. In practice such a small violation of the
Lorentz symmetry may be expected in a unified theory at very high energy. In
this paper a non-minimal coupling term, which exhibits Lorentz violation, is
added as a new term in the covariant form. The differential cross section for
Bhabha scattering in the GEM framework at finite temperature is calculated that
includes Lorentz violation. The Thermo Field Dynamics (TFD) formalism is used
to calculate the total differential cross section at finite temperature. The
contribution due to Lorentz violation is isolated from the total cross section.
It is found to be small in magnitude.Comment: 14 pages, 1 figure, accepted for publication in Mod. Phys. Lett. A.
arXiv admin note: text overlap with arXiv:1801.0600
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