715 research outputs found
Alternative Derivation of the Correspondence Between Rindler and Minkowski Particles
We develop an alternative derivation of Unruh and Wald's seminal result that
the absorption of a Rindler particle by a detector as described by uniformly
accelerated observers corresponds to the emission of a Minkowski particle as
described by inertial observers. Actually, we present it in an inverted
version, namely, that the emission of a Minkowski particle corresponds in
general to either the emission or the absorption of a Rindler particle.Comment: 7 pages, no-figures, REVTE
Elementary particles under the lens of the black holes
After a brief review of the historical development and CLASSICAL properties
of the BLACK HOLES, we discuss how our present knowledge of some of their
QUANTUM properties shed light on the very concept of ELEMENTARY PARTICLE. As an
illustration, we discuss in this context the decay of accelerated protons,
which may be also relevant to astrophysics.Comment: 6 pages, Proceedings of the XXIII Brazilian National Meeting on
Particles Physics and Fields. To appear in special issue of the Brazilian
Journal of Physic
Search for semiclassical-gravity effects in relativistic stars
We discuss the possible influence of gravity in the neutronization process,
, which is particularly important as a cooling mechanism
of neutron stars. Our approach is semiclassical in the sense that leptonic
fields are quantized on a classical background spacetime, while neutrons and
protons are treated as excited and unexcited nucleon states, respectively. We
expect gravity to have some influence wherever the energy content carried by
the in-state is barely above the neutron mass. In this case the emitted
neutrinos would be soft enough to have a wavelength of the same order as the
space curvature radius.Comment: 10 pages (REVTEX
Do static sources outside a Schwarzschild black hole radiate?
We show that static sources coupled to a massless scalar field in
Schwarzschild spacetime give rise to emission and absorption of zero-energy
particles due to the presence of Hawking radiation. This is in complete analogy
with the description of the bremsstrahlung by a uniformly accelerated charge
from the coaccelerated observers' point of view. The response rate of the
source is found to coincide with that in Minkowski spacetime as a function of
its proper acceleration. This result may be viewed as restoration of the
equivalence principle by the Hawking effect.Comment: 13 page
Decay of protons and neutrons induced by acceleration
We investigate the decay of accelerated protons and neutrons. Calculations
are carried out in the inertial and coaccelerated frames. Particle
interpretation of these processes are quite different in each frame but the
decay rates are verified to agree in both cases. For sake of simplicity our
calculations are performed in a two-dimensional spacetime since our conclusions
are not conceptually affected by this.Comment: 18 pages (REVTEX), 3 figure
Rindler and Minkowski particles relationship revisited
We show that the emission of a Minkowski particle by a general class of
scalar sources as described by inertial observers corresponds to either the
emission or the absorption of a Rindler particle as described by uniformly
accelerated observers. Our results are discussed in connection with the current
controversy whether uniformly accelerated detectors radiate.Comment: To appear in Physics Letters B, 9 pages, LATEX, no-figure
The Unruh effect and its applications
It has been thirty years since the discovery of the Unruh effect. It has
played a crucial role in our understanding that the particle content of a field
theory is observer dependent. This effect is important in its own right and as
a way to understand the phenomenon of particle emission from black holes and
cosmological horizons. Here, we review the Unruh effect with particular
emphasis to its applications. We also comment on a number of recent
developments and discuss some controversies. Effort is also made to clarify
what seems to be common misconceptions.Comment: 53 pages, 11 figures, submitted to Reviews of Modern Physic
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