id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
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gr-qc/9404054 | Linear stochastic wave-equations for continuously measured quantum
systems | While the linearity of the Schr\"odinger equation and the superposition
principle are fundamental to quantum mechanics, so are the backaction of
measurements and the resulting nonlinearity. It is remarkable, therefore, that
the wave-equation of systems in continuous interaction with some reservoir,
which may be a measu... | 1994-04-26 | 2009-10-22 | [
"gr-qc"
] | Peter Goetsch and Robert Graham |
gr-qc/9404049 | Closed spherically symmetric massless scalar field spacetimes have
finite lifetimes | The closed-universe recollapse conjecture is studied for a class of closed
spherically symmetric spacetimes which includes those having as a matter
source: (1) a massless scalar field; (2) a perfect fluid obeying the equation
of state $\rho = P$; and (3) null dust. It is proven that all timelike curves
in any such spac... | 1994-04-26 | 2010-11-19 | [
"gr-qc"
] | Gregory A. Burnett |
gr-qc/9404048 | Semiclassical Gravitational Effects in de Sitter Space at Finite
Temperature | In the framework of finite temperature conformal scalar field theory on de
Sitter space-time the linearized Einstein equations for the renormalized stress
tensor are exactly solved. In this theory quantum field fluctuations are
concentrated near two spheres of the de Sitter radius, propagating as light
wave fronts. Rel... | 1994-04-26 | 2010-04-06 | [
"gr-qc"
] | D.V. Fursaev, G. Miele |
gr-qc/9404043 | Three-dimensional initial data for the collision of two black holes II:
Quasi-circular orbits for equal-mass black holes | The construction of initial-data sets representing binary black-hole
configurations in quasi-circular orbits is studied in the context of the
conformal-imaging formalism. An effective-potential approach for locating
quasi-circular orbits is outlined for the general case of two holes of
arbitrary size and with arbitrary... | 1994-04-25 | 2009-09-25 | [
"gr-qc",
"astro-ph"
] | Gregory B. Cook |
gr-qc/9404044 | Quantum Cosmology and Higher-Order Lagrangian Theories | In this paper the quantum cosmological consequences of introducing a term
cubic in the Ricci curvature scalar $R$ into the Einstein--Hilbert action are
investigated. It is argued that this term represents a more generic
perturbation to the action than the quadratic correction usually considered. A
qualitative argument ... | 1994-04-25 | 2010-04-06 | [
"gr-qc"
] | Henk van Elst, James E Lidsey & Reza Tavakol |
gr-qc/9404052 | Vector Fields on a Disk with Mixed Boundary Conditions | We study vector fields on a disk satisfying two types of mixed boundary
conditions. These boundary conditions are selected by BRST-invariance in
electrodynamics. They also appear in the de Rham complex. The manifest
construction of the harmonic expansion is presented. The eigenfunctions of the
vector Laplace operator a... | 1994-04-25 | 2009-10-22 | [
"gr-qc"
] | Dmitri Vassilevich |
gr-qc/9404045 | Classical and Quantum Properties of Liouville Black Holes | Black hole spacetimes can arise when a Liouville field is coupled to two-
dimensional gravity. Exact solutions are obtained both classically and when
quantum corrections due to back reaction effects are included. The black hole
temperature depends upon the mass and the thermodynamic limit breaks down
before evaporation... | 1994-04-25 | 2007-05-23 | [
"gr-qc"
] | R.B. Mann |
gr-qc/9404046 | Traversable Wormholes in (2+1) and (3+1) Dimensions with a Cosmological
Constant | Macroscopic traversable wormhole solutions to Einstein's field equations in
$(2+1)$ and $(3+1)$ dimensions with a cosmological constant are investigated.
Ensuring traversability severely constrains the material used to generate the
wormhole's spacetime curvature. Although the presence of a cosmological
constant modifie... | 1994-04-25 | 2009-10-22 | [
"gr-qc"
] | M.S. Delgaty and R.B. Mann |
gr-qc/9504037 | Soliton Induced Singularities in 2 d Gravity and their Evaporation | Positive energy singularities induced by Sine-Gordon solitons in 1+1
dimensional dilaton gravity with positive and negative cosmological constant
are considered. When the cosmological constant is positive, the singularities
combine a white hole, a timelike singularity and a black hole joined smoothly
near the soliton c... | 1994-04-24 | 2010-11-01 | [
"gr-qc"
] | Cenalo Vaz and Louis Witten |
gr-qc/9404042 | Bases of Wormholes in Quantum Cosmology | We show that if the space of physical states spanned by the wormhole wave
functions can be equipped with a Hilbert structure, such a Hilbert space must
coincide with that of the Lorentzian gravitational system under consideration.
The physical inner product can then be determined by imposing a set of
Lorentzian reality... | 1994-04-24 | 2010-04-06 | [
"gr-qc"
] | Guillermo A. Mena Marugan |
gr-qc/9404041 | Cylindrical Black Hole in General Relativity | A black hole solution of Einstein's field equations with cylindrical symmetry
is found. Using the Hamiltonian formulation one is able to define mass and
angular momentum for the cylindrical black hole through the corresponding and
equivalent three dimensional theory. The causal structure is analyzed.
Comments: revised ... | 1994-04-23 | 2010-11-01 | [
"gr-qc"
] | Jose' P. S. Lemos |
gr-qc/9404040 | Static Charged Black Holes in $(2+1)$ Dimensional Dilaton Gravity | A one parameter family of static charged black hole solutions in
$(2+1)$-dimensional general relativity minimally coupled to a dilaton
$\phi\propto ln({r\over\beta})$ with a potential term $e^{b\phi}\Lambda$ is
obtained. Their causal strutures are investigated, and thermodynamical
temperature and entropy are computed. ... | 1994-04-21 | 2014-11-17 | [
"gr-qc"
] | K.C.K. Chan and R.B. Mann |
gr-qc/9404038 | Stability and Hamiltonian formulation of higher derivative theories | We analyze the presumptions which lead to instabilities in theories of order
higher than second. That type of fourth order gravity which leads to an
inflationary (quasi de Sitter) period of cosmic evolution by inclusion of one
curvature squared term (i.e. the Starobinsky model) is used as an example. The
corresponding ... | 1994-04-19 | 2014-11-17 | [
"gr-qc"
] | Hans - Juergen Schmidt |
gr-qc/9404039 | Black Hole Entropy and Induced Gravity | In this short essay we review the arguments showing that black hole entropy
is, at least in part, ``entanglement entropy", i.e., missing information
contained in correlations between quantum field fluctuations inside and outside
the event horizon. Although the entanglement entropy depends upon the matter
field content ... | 1994-04-19 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Ted Jacobson |
gr-qc/9404036 | Wavefunction of a Black Hole and the Dynamical Origin of Entropy | Recently it was proposed to explain the dynamical origin of the entropy of a
black hole by identifying its dynamical degrees of freedom with states of
quantum fields propagating in the black-hole's interior. The present paper
contains the further development of this approach. The no-boundary proposal
(analogous to the ... | 1994-04-19 | 2011-04-18 | [
"gr-qc"
] | A.O.Barvinsky, V.P.Frolov, and A.I.Zelnikov |
gr-qc/9404037 | Why do all the curvature invariants of a gravitational wave vanish ? | We prove the theorem valid for (Pseudo)-Riemannian manifolds $V_n$: "Let $x
\in V_n$ be a fixed point of a homothetic motion which is not an isometry then
all curvature invariants vanish at $x$." and get the Corollary: "All curvature
invariants of the plane wave metric $$ds \sp 2 \quad = \quad 2 \, du \, dv \, +
\, a\s... | 1994-04-19 | 2007-05-23 | [
"gr-qc"
] | Hans - J\"urgen Schmidt |
gr-qc/9404034 | Static axisymmetric spacetimes with non-generic world-line SUSY | The conditions for the existence of Killing-Yano tensors, which are closely
related to the appearance of non-generic world-line SUSY, are presented for
static axisymmetric spacetimes. Imposing the vacuum Einstein equation, the set
of solutions admitting Killing-Yano tensors is considered. In particular, it is
shown tha... | 1994-04-18 | 2008-11-26 | [
"gr-qc"
] | Masayuki Tanimoto |
gr-qc/9404035 | Universal Approach to Cosmological Singularities in Two Dimensional
Dilaton Gravity | We show that in a large class of two dimensional models with conformal matter
fields, the semiclassical cosmological solutions have a weak coupling
singularity if the classical matter content is below a certain threshold. This
threshold and the approach to the singularity are model-independent. When the
matter fields a... | 1994-04-18 | 2010-01-06 | [
"gr-qc"
] | G.N. Martin and F.D. Mazzitelli |
gr-qc/9404033 | Conformal Coupling and Invariance in Different Dimensions | Conformal transformations of the following kinds are compared: (1) conformal
coordinate transformations, (2) conformal transformations of Lagrangian models
for a D-dimensional geometry, given by a Riemannian manifold M with metric g of
arbitrary signature, and (3) conformal transformations of (mini-)superspace
geometry... | 1994-04-17 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | M. Rainer |
gr-qc/9404032 | Resolution of simple singularities yielding particle symmetries in a
space-time | A finite subgroup of the conformal group SL(2,C) can be related to invariant
polynomials on a hypersurface in C^3. The latter then carries a simple
singularity, which resolves by a finite iteration of basic cycles of
deprojections. The homological intersection graph of this cycles is the Dynkin
graph of an ADE Lie grou... | 1994-04-17 | 2010-11-01 | [
"gr-qc",
"alg-geom",
"hep-th",
"math.AG"
] | M. Rainer |
gr-qc/9404031 | Optical scalars in spherical spacetimes | Consider a spherically symmetric spacelike slice through a spherically
symmetric spacetime. One can derive a universal bound for the optical scalars
on any such slice. The only requirement is that the matter sources satisfy the
dominant energy condition and that the slice be asymptotically flat and regular
at the origi... | 1994-04-15 | 2009-12-30 | [
"gr-qc"
] | E. Malec and N. \'O Murchadha (Physics Department, University College,
Cork, Ireland and Uniwersytet Jagiello\'nski, Instytut Fizyki, 30-059
Krak\'ow, Poland) |
gr-qc/9404029 | The Problems of Time and Observables: Some Recent Mathematical Results | We present 2 recent results on the problems of time and observables in
canonical gravity. (1) We cannot use parametrized field theory to solve the
problem of time because, strictly speaking, general relativity is not a
parametrized field theory. (2) We show that there are essentially no local
observables for vacuum spa... | 1994-04-14 | 2007-05-23 | [
"gr-qc"
] | C. G. Torre |
gr-qc/9404028 | Decoherence, Correlation, and Unstable Quantum States in Semiclassical
Cosmology | It is demonstrated that almost any S-matrix of quantum field theory in curved
spaces posses an infinite set of complex poles (or branch cuts). These poles
can be transformed into complex eigenvalues, the corresponding eigenvectors
being Gamow vectors. All this formalism, which is heuristic in ordinary Hilbert
space, be... | 1994-04-14 | 2010-11-01 | [
"gr-qc"
] | M. Castagnino and F. Lombardo (Univ. of Buenos Aires) |
gr-qc/9404030 | Classification of Generalized Symmetries for the Vacuum Einstein
Equations | A generalized symmetry of a system of differential equations is an
infinitesimal transformation depending locally upon the fields and their
derivatives which carries solutions to solutions. We classify all generalized
symmetries of the vacuum Einstein equations in four spacetime dimensions. To
begin, we analyze symmetr... | 1994-04-14 | 2008-11-26 | [
"gr-qc"
] | I. M. Anderson and C. G. Torre |
gr-qc/9404027 | Gravitational Shock Waves for Schwarzschild and Kerr Black Holes | The metrics of gravitational shock waves for a Schwarzschild black hole in
ordinary coordinates and for a Kerr black hole in Boyer-Lindquist coordinates
are derived. The Kerr metric is discussed for two cases: the case of a Kerr
black hole moving parallel to the rotational axis, and moving perpendicular to
the rotation... | 1994-04-13 | 2011-09-09 | [
"gr-qc"
] | Koichi HAYASHI and Toshiharu SAMURA |
gr-qc/9404026 | Source Vacuum Fluctuations of Black Hole Radiance | The emergence of Hawking radiation from vacuum fluctuations is analyzed in
conventional field theories and their energy content is defined through the
Aharonov weak value concept. These fluctuations travel in flat space-time and
carry transplanckian energies sharply localized on cisplanckian distances. We
argue that th... | 1994-04-13 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | F. Englert, S. Massar and R. Parentani |
gr-qc/9404023 | Higher order gravity, gauge invariant variables, and quantum behavior in
Weyl-like geometries | This paper presents the detailed, standard treatment of a simple, gauge
invariant action for Weyl and Weyl-like Cartan geometries outlined in a
previous paper. In addition to the familiar scalar curvature squared and
Maxwell terms, the action chosen contains the logarithmic derivative of the
scalar curvature combined w... | 1994-04-13 | 2018-07-26 | [
"gr-qc"
] | J.E. Rankin |
gr-qc/9404024 | Gravitation Singularities of the Caustic Type | In view of the well-known correspondence between gravitational fields and
space-time distributions on a world manifold X, the criterion of gravitation
singularities as singularities of these distributions is suggested. In the germ
terms, singularities of a (3+1) distribution look locally like singularities of
a foliati... | 1994-04-13 | 2007-05-23 | [
"gr-qc"
] | G.Sardanashvily (Department of Theoretical Physics, Moscow State
University, Moscow, Russia) |
gr-qc/9404025 | Entropy Generation in Quantum Gravity and Black Hole Remnants | The area entropy $A/4$ and the related Hawking temperature in the presence of
event horizons are rederived, for de Sitter and black hole topologies, as a
consequence of a tunneling of the wave functional associated to the classical
coupled matter and gravitational fields. The extension of the wave functional
outside th... | 1994-04-13 | 2009-09-25 | [
"gr-qc",
"hep-th"
] | A. Casher and F. Englert |
gr-qc/9404022 | The Role of the Future in Quantum Theory | Interpretation problems are eliminated from quantum theory by picturing a
quantum history as having been sampled from a probability distribution over the
set of histories which are permitted by all relevant boundary conditions. In
laboratory physics, the final measurement plays a crucial role in defining the
set of all... | 1994-04-12 | 2007-05-23 | [
"gr-qc"
] | Paul Sommers |
gr-qc/9404021 | The Decoherence of Phase Space Histories | In choosing a family of histories for a system, it is often convenient to
choose a succession of locations in phase space, rather than configuration
space, for comparison to classical histories. Although there are no good
projections onto phase space, several approximate projections have been used in
the past; three of... | 1994-04-12 | 2008-02-03 | [
"gr-qc",
"hep-th"
] | Todd A. Brun (Department of Physics, Caltech) |
gr-qc/9404019 | The Positivity of Energy for Asymptotically Anti-de Sitter Spacetimes | We use the formulation of asymptotically anti-de Sitter boundary conditions
given by Ashtekar and Magnon to obtain a coordinate expression for the general
asymptotically AdeS metric in a neighbourhood of infinity. From this, we are
able to compute the time delay of null curves propagating near infinity. If the
gravitat... | 1994-04-11 | 2010-04-06 | [
"gr-qc"
] | E. Woolgar |
gr-qc/9404020 | Positive Energy for Asymptotically Anti-de Sitter Schwarzschild
Spacetimes | Within the general class of Asymptotically Anti-de Sitter spacetimes that are
asymptotic to the A-de-S Schwarzschild metric, we give a simple positive mass
theorem based on arguments from causal structure. A general result for all
asymptotically A-de-S spacetimes will be given elsewhere. | 1994-04-11 | 2007-05-23 | [
"gr-qc"
] | E. Woolgar |
gr-qc/9404017 | Quasiclassical Realms in a Quantum Universe | In this universe, governed fundamentally by quantum mechanical laws,
characterized by indeterminism and distributed probabilities, classical
deterministic laws are applicable over a wide range of time, place, and scale.
We review the origin of these laws in the context of the quantum mechanics of
closed systems, most g... | 1994-04-11 | 2008-02-03 | [
"gr-qc",
"hep-th"
] | James B. Hartle |
gr-qc/9404018 | Fermion Helicity Flip in Weak Gravitational Fields | The helicity flip of a spin-${\textstyle \frac{1}{2}}$ Dirac particle
interacting gravitationally with a scalar field is analyzed in the context of
linearized quantum gravity. It is shown that massive fermions may have their
helicity flipped by gravity, in opposition to massless fermions which preserve
their helicity. | 1994-04-11 | 2009-10-22 | [
"gr-qc",
"hep-ph"
] | R. Aldrovandi, G. E. A. Matsas, S. F. Novaes, and D. Spehler |
gr-qc/9404016 | Generating new magnetic universe solutions from old | In this paper we apply the techniques which have been developed over the last
few decades for generating nontrivially new solutions of the Einstein-Maxwell
equations from seed solutions for simple spacetimes. The simple seed spacetime
which we choose is the "magnetic universe" to which we apply the Ehlers
transformatio... | 1994-04-10 | 2009-10-22 | [
"gr-qc"
] | David Garfinkle and M.A. Melvin |
gr-qc/9404014 | Exotic Black Holes | Black hole solutions can be used to shed light on general issues in General
Relativity and Quantum Physics. Black--hole hair, entropy and naked
singularities are considered here, along with some implications for the
inflationary universe scenario. | 1994-04-08 | 2007-05-23 | [
"gr-qc"
] | Ian G. Moss |
gr-qc/9404015 | Stability of the Cauchy horizon in Kerr--de Sitter spacetimes | We begin a program of work aimed at examining the interior of a rotating
black hole with a non--zero cosmological constant. The generalisation of
Teukolsky's equation for the radial mode functions is presented. It is shown
that the energy fluxes of scalar, electromagnetic and gravity waves are regular
at the Cauchy hor... | 1994-04-08 | 2010-04-06 | [
"gr-qc"
] | Chris M. Chambers and Ian G. Moss |
gr-qc/9404013 | Equivalent Sets of Histories and Multiple Quasiclassical Realms | We consider notions of physical equivalence of sets of histories in the
quantum mechanics of a closed system. We show first how the same set of
histories can be relabeled in various ways, including the use of the Heisenberg
equations of motion and of passive transformations of field variables. In the
the usual approxim... | 1994-04-08 | 2008-02-03 | [
"gr-qc",
"hep-th"
] | Murray Gell-Mann and James B. Hartle (Santa Fe Institute, Los Alamos,
and University of New Mexico) |
gr-qc/9404012 | Complementary Relativity | Special theory of relativity has been formulated in a vacuum momentum-energy
representation which is equivalent to Einstein special relativity and predicts
just the same results as it. Although in this sense such a formulation would be
at least classically useless, its consistent extension to noninertial frames
produce... | 1994-04-07 | 2007-05-23 | [
"gr-qc"
] | P.F. Gonzalez-Diaz |
gr-qc/9404011 | The fate of black hole singularities and the parameters of the standard
models of particle physics and cosmology | A cosmological scenario which explains the values of the parameters of the
standard models of elementary particle physics and cosmology is discussed. In
this scenario these parameters are set by a process analogous to natural
selection which follows naturally from the assumption that the singularities in
black holes ar... | 1994-04-07 | 2007-05-23 | [
"gr-qc"
] | Lee Smolin |
gr-qc/9404010 | Fermions and Topology | The canonical theory of quantum gravity in the loop representation can be
extended to incorporate topology change, in the simple case that this refers to
the creation or annihilation of "minimalist wormholes" in which two points of
the spatial manifold are identified. Furthermore, if the states of the
wormholes threade... | 1994-04-07 | 2007-05-23 | [
"gr-qc"
] | Lee Smolin |
gr-qc/9404007 | Reference Fluids as Standards of Space and Time | The idea that spacetime points are to be identified by a fleet of
clock--carrying particles can be traced to the earliest days of general
relativity. Such a fleet of clocks can be described phenomenologically as a
reference fluid. One approach to the problem of time consists in coupling the
metric to a reference fluid ... | 1994-04-06 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | David Brown |
gr-qc/9404006 | Black Hole Thermodynamics in a Box | Simple calculations indicate that the partition function for a black hole is
defined only if the temperature is fixed on a finite boundary. Consequences of
this result are discussed. (Contribution to the Proceedings of the Lanczos
Centenary Conference.) | 1994-04-06 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | David Brown |
gr-qc/9404008 | Quantization of the Bianchi type-IX model in supergravity with a
cosmological constant | Diagonal Bianchi type-IX models are studied in the quantum theory of $ N = 1
$ supergravity with a cosmological constant. It is shown, by imposing the
supersymmetry and Lorentz quantum constraints, that there are no physical
quantum states in this model. The $ k = + 1 $ Friedmann model in supergravity
with cosmological... | 1994-04-06 | 2009-10-22 | [
"gr-qc"
] | A.D.Y. Cheng, P.D. D'Eath and P.R.L.V. Moniz |
gr-qc/9404005 | On "asymptotically flat" space-times with $G_{2}$-invariant Cauchy
surfaces | In this paper we study space-times which evolve out of Cauchy data
$(\Sigma,{}^3g,K)$ invariant under the action of a two-dimensional commutative
Lie group. Moreover $(\Sigma,{}^3g,K)$ are assumed to satisfy certain
completeness and asymptotic flatness conditions in spacelike directions. We
show that asymptotic flatnes... | 1994-04-06 | 2013-12-19 | [
"gr-qc"
] | B.Berger, P.T. Chrusciel, V.Moncrief |
gr-qc/9404004 | Particle-like solutions to topologically massive gravity | The solution of topologically massive gravity with cosmological constant is
reduced, for space-times with two commuting Killing vectors, to a
special-relativistic dynamical problem. This approach is applied to the
construction of a class of exact sourceless, horizonless solutions asymptotic
to the BTZ extreme black hol... | 1994-04-05 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | G\'erard Cl\'ement |
gr-qc/9404003 | Localized Exotic Smoothness | Gompf's end-sum techniques are used to establish the existence of an infinity
of non-diffeomorphic manifolds, all having the same trivial ${\bf R^4}$
topology, but for which the exotic differentiable structure is confined to a
region which is spatially limited. Thus, the smoothness is standard outside of
a region which... | 1994-04-04 | 2010-04-06 | [
"gr-qc"
] | Carl H. Brans |
gr-qc/9404002 | The Patchwork Divergence Theorem | The divergence theorem in its usual form applies only to suitably smooth
vector fields. For vector fields which are merely piecewise smooth, as is
natural at a boundary between regions with different physical properties, one
must patch together the divergence theorem applied separately in each region.
We give an elegan... | 1994-04-02 | 2011-07-19 | [
"gr-qc",
"dg-ga",
"math.DG"
] | Tevian Dray and Charles Hellaby |
gr-qc/9404001 | Failure of Standard Conservation Laws at a Classical Change of Signature | The Divergence Theorem as usually stated cannot be applied across a change of
signature unless it is re-expressed to allow for a finite source term on the
signature change surface. Consequently all conservation laws must also be
`modified', and therefore insistence on conservation of matter across such a
surface cannot... | 1994-04-02 | 2009-10-22 | [
"gr-qc"
] | Charles Hellaby and Tevian Dray |
gr-qc/9404009 | Performance of Newtonian filters in detecting gravitational waves from
coalescing binaries | Coalescing binary systems are one of the most promising sources of
gravitational waves. The technique of matched filtering used in the detection
of gravitational waves from coalescing binaries relies on the construction of
accurate templates. Until recently filters modelled on the quadrupole or the
Newtonian approximat... | 1994-04-01 | 2011-09-09 | [
"gr-qc"
] | R. Balasubramanian and S. V. Dhurandhar |
gr-qc/9403065 | Dirac versus Reduced Quantization of the Poincar\'{e} Symmetry in Scalar
Electrodynamics | The generators of the Poincar\'{e} symmetry of scalar electrodynamics are
quantized in the functional Schr\"{o}dinger representation. We show that the
factor ordering which corresponds to (minimal) Dirac quantization preserves the
Poincar\'{e} algebra, but (minimal) reduced quantization does not. In the
latter, there i... | 1994-03-31 | 2009-10-22 | [
"gr-qc"
] | R.J. Epp (Physics Department, University of Winnipeg, Winnipeg,
Manitoba Canada), G. Kunstatter (Physics Department, University of Manitoba
Winnipeg, Manitoba, Canada, and Winnipeg Institute for Theoretical Physics,
Physics Department, University of Winnipeg, Winnipeg, Manitoba Canada) |
gr-qc/9403063 | The Birkhoff Theorem in Multidimensional Gravity | The validity conditions for the extended Birkhoff theorem in multidimensional
gravity with $n$ internal spaces are formulated, with no restriction on
space-time dimensionality and signature. Examples of matter sources and
geometries for which the theorem is valid are given. Further generalization of
the theorem is disc... | 1994-03-31 | 2016-08-31 | [
"gr-qc"
] | K.A.Bronnikov and V.N.Melnikov |
gr-qc/9403064 | Multidimensional Cosmology with $m$-Component Perfect Fluid | A cosmological model describing the evolution of $n$ Einstein spaces $(n>1)$
with $m$-component perfect-fluid matter is considered. When all spaces are
Ricci-flat and for any $\alpha$-th component the pressures in all spaces are
proportional to the density: $p_{i}^{(\alpha)} = (1- h_{i}^{(\alpha)})
\rho^{(\alpha)}$, $h... | 1994-03-31 | 2011-04-20 | [
"gr-qc"
] | V. D. Ivashchuk and V. N. Melnikov |
gr-qc/9403062 | Self - Interaction Force for the Particle in the Cone Space - Time | The force acting on the charged particle moving along an arbitrary trajectory
near the straight cosmic string is calculated. This interaction leads to the
scattering of particles by the cosmic string. The scattering cross section is
considered. | 1994-03-30 | 2010-04-06 | [
"gr-qc",
"astro-ph"
] | N R Khusnutdinov |
gr-qc/9403060 | Scattering of Fermions off Dilaton Black Holes | We discuss how various properties of dilaton black holes depend on the
dilaton coupling constant $a$. In particular we investigate the $a$-dependence
of certain mass parameters both outside and in the extremal limit and discuss
their relation to thermodynamical quantities. To further illuminate the role of
the coupling... | 1994-03-30 | 2010-04-06 | [
"gr-qc"
] | Bjorn Jensen and Ulf Linstrom |
gr-qc/9403058 | Consequences of Propagating Torsion in Connection-Dynamic Theories of
Gravity | We discuss the possibility of constraining theories of gravity in which the
connection is a fundamental variable by searching for observational
consequences of the torsion degrees of freedom. In a wide class of models, the
only modes of the torsion tensor which interact with matter are either a
massive scalar or a mass... | 1994-03-30 | 2009-10-22 | [
"gr-qc",
"hep-ph"
] | Sean M. Carroll and George B. Field |
gr-qc/9403061 | Quantum Statistical Field Theory in Gravitation and Cosmology | We describe how the concepts of quantum open systems and the methods of
closed-time-path (CTP) effective action and influence functional (IF) can be
usefully applied to the analysis of statistical mechanical problems involving
quantum fields in gravitation and cosmology. In the first lecture we discuss in
general terms... | 1994-03-30 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | B. L. Hu |
gr-qc/9403055 | Linearly Positive Histories: Probabilities for a Robust Family of
Sequences of Quantum Events | Nonnegative probabilities that obey the sum rules may be assigned to a much
wider family of sets of histories than decohering histories. The resulting {\it
linearly positive histories} avoid the highly restrictive decoherence
conditions and yet give the same probabilities when those conditions apply.
Thus linearly posi... | 1994-03-29 | 2014-11-17 | [
"gr-qc",
"hep-th"
] | Sheldon Goldstein (Rutgers University) and Don N. Page (University of
Alberta) |
gr-qc/9403056 | On Infrared Effects in de~Sitter Background | We have estimated higher order quantum gravity corrections to de~Sitter
spacetime. Our results suggest that, while the classical spacetime metric may
be distorted by the graviton self-interactions, the corrections are relatively
weaker than previously thought, possibly growing like a power rather than
exponentially in ... | 1994-03-29 | 2009-10-22 | [
"gr-qc",
"hep-ph"
] | A. D. Dolgov, M. B. Einhorn, and V. I. Zakharov |
gr-qc/9403057 | Total Mass-Momentum of Arbitrary Initial-Data Sets in General Relativity | For an asymptotically flat initial-data set in general relativity, the total
mass-momentum may be interpreted as a Hermitian quadratic form on the complex,
two-dimensional vector space of ``asymptotic spinors''. We obtain a
generalization to an arbitrary initial-data set. The mass-momentum is retained
as a Hermitian qu... | 1994-03-29 | 2008-11-26 | [
"gr-qc"
] | Robert Geroch and Shyan-Ming Perng |
gr-qc/9403059 | On Possible Measurement of Gravitational Interaction Parameters on Board
a Satellite | The recently suggested SEE (Satellite Energy Exchange) method of measuring
the gravitational constant $G$, possible equivalence principle violation
(measured by the E\"{o}tv\"{o}s parameter $\eta$) and the hypothetic 5th force
parameters $\alpha$ and $\lambda$ on board a drag-free Earth's satellite is
discussed and fur... | 1994-03-29 | 2008-02-03 | [
"gr-qc"
] | A.D.Alexeev, K.A.Bronnikov, N.I.Kolosnitsyn, M.Yu.Konstantinov,
V.N.Melnikov and A.G.Radynov |
gr-qc/9403053 | Post-Newtonian Limits and Gravitational Radiation from the Superstring
Effective Action | We consider the gravitational sector of the superstring effective action with
axion-matter couplings. The field equations are developed in the post-Newtonian
scheme and approximate solutions for a spinning point mass and a cosmic string
are presented. Furthermore, assuming vanishing axion mass and vanishing
potential f... | 1994-03-29 | 2009-10-22 | [
"gr-qc"
] | A.A. Kehagias |
gr-qc/9403054 | A Fluctuation-Dissipation Relation for Semiclassical Cosmology | Using the concept of open systems where the classical geometry is treated as
the system and the quantum matter field as the environment, we derive a
fluctuation-dissipation theorem for semiclassical cosmology. This theorem which
exists under very general conditions for dissipations in the dynamics of the
system, and th... | 1994-03-29 | 2008-11-26 | [
"gr-qc",
"astro-ph"
] | B. L. Hu and Sukanya Sinha |
gr-qc/9403051 | Orbital Tests of Relativistic Gravity using Artificial Satellites | We reexamine non-Einsteinian effects observable in the orbital motion of
low-orbit artificial Earth satellites. The motivations for doing so are
twofold: (i) recent theoretical studies suggest that the correct theory of
gravity might contain a scalar contribution which has been reduced to a small
value by the effect of... | 1994-03-28 | 2011-08-11 | [
"gr-qc"
] | Thibault Damour and Gilles Esposito-Farese |
gr-qc/9403048 | Hawking Radiation from Black Holes Formed During Quantum Tunneling | We study the behaviour of scalar fields on background geometries which
undergo quantum tunneling. The two examples considered are a moving mirror in
flat space which tunnels through a potential barrier, and a false vacuum bubble
which tunnels to form a black hole. WKB approximations to the Schrodinger and
Wheeler-DeWit... | 1994-03-28 | 2009-10-22 | [
"gr-qc"
] | Per Kraus |
gr-qc/9403049 | Open and Closed Universes, Initial Singularities and Inflation | The existence of initial singularities in expanding universes is proved
without assuming the timelike convergence condition. The assumptions made in
the proof are ones likely to hold both in open universes and in many closed
ones. (It is further argued that at least some of the expanding closed
universes that do not ob... | 1994-03-28 | 2009-10-22 | [
"gr-qc"
] | Arvind Borde |
gr-qc/9403050 | The Cosmic No-Hair Theorem and the Nonlinear Stability of Homogeneous
Newtonian Cosmological Models | The validity of the cosmic no-hair theorem is investigated in the context of
Newtonian cosmology with a perfect fluid matter model and a positive
cosmological constant. It is shown that if the initial data for an expanding
cosmological model of this type is subjected to a small perturbation then the
corresponding solut... | 1994-03-28 | 2010-04-06 | [
"gr-qc"
] | U. Brauer, A. Rendall, O. Reula |
gr-qc/9403052 | The Problem of Time and Quantum Black Holes | We discuss the derivation of the so-called semi-classical equations for both
mini-superspace and dilaton gravity. We find that there is no systematic
derivation of a semi-classical theory in which quantum mechanics is formulated
in a space-time that is a solution of Einstein's equation, with the expectation
value of th... | 1994-03-28 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | S. P. de Alwis and D. A. MacIntire |
gr-qc/9403047 | Decoherent Histories and Quantum State Diffusion | We demonstrate a close connection between the decoherent histories (DH)
approach to quantum mechanics and the quantum state diffusion (QSD) picture,
for open quantum systems described by a master equation of Lindblad form. The
(physically unique) set of variables that localize in the QSD picture also
define an approxim... | 1994-03-26 | 2009-10-22 | [
"gr-qc",
"cond-mat",
"hep-th"
] | L.Diosi, N.Gisin, J.J.Halliwell and I.G.Percival |
gr-qc/9403046 | Quantum Master Equation of Particle in Gas Environment | The evolution of the reduced density operator $\rho$ of Brownian particle is
discussed in single collision approach valid typically in low density gas
environments. This is the first succesful derivation of quantum friction caused
by {\it local} environmental interactions. We derive a Lindblad master equation
for $\rho... | 1994-03-23 | 2009-10-22 | [
"gr-qc",
"cond-mat"
] | Lajos Diosi |
gr-qc/9403045 | Fermion emission in a two-dimensional black hole space-time | We investigate massless fermion production by a two-dimensional dilatonic
black hole. Our analysis is based on the Bogoliubov transformation relating the
outgoing fermion field observed outside the black hole horizon to the incoming
field present before the black hole creation. It takes full account of the fact
that th... | 1994-03-22 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | G. Wanders |
gr-qc/9403042 | Integration on the space of Connections Modulo Gauge Transformations | A summary of the known results on integration theory on the space of
connections modulo gauge transformations is presented and its significance to
quantum theories of gauge fields and gravity is discussed. The emphasis is on
the underlying ideas rather than the technical subtleties. | 1994-03-22 | 2008-02-03 | [
"gr-qc",
"hep-th"
] | Abhay Ashtekar, Donald Marolf, and Jose Mourao |
gr-qc/9403044 | Fermi Coordinates for Weak Gravitational Fields | A Reference is corrected. (We derive the Fermi coordinate system of an
observer in arbitrary motion in an arbitrary weak gravitational field valid to
all orders in the geodesic distance from the worldline of the observer. In flat
space-time this leads to a generalization of Rindler space for arbitrary
acceleration and ... | 1994-03-22 | 2009-10-22 | [
"gr-qc"
] | Karl-Peter Marzlin |
gr-qc/9403041 | Global structure of Witten's 2+1 gravity on ${\bf R}\times T^2$ | We investigate the space ${\cal M}$ of classical solutions to Witten's
formulation of 2+1 gravity on the manifold ${\bf R} \times T^2$. ${\cal M}$ is
connected, but neither Hausdorff nor a manifold. However, removing from ${\cal
M}$ a set of measure zero yields a connected manifold which is naturally viewed
as the cota... | 1994-03-21 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Jorma Louko and Donald Marolf |
gr-qc/9403043 | Backreaction in Semiclassical Cosmolgy: The Einstein Langevin Equation | Using the influence functional formalism we show how to derive a generalized
Einstein equation in the form of a Langevin equation for the description of the
backreaction of quantum fields and their fluctuations on the dynamics of curved
spacetimes. We show how a functional expansion on the influence functional
gives th... | 1994-03-21 | 2008-11-26 | [
"gr-qc"
] | Be-lok Hu and Andrew Matacz |
gr-qc/9403040 | A Connection Approach to Numerical Relativity | We discuss a general formalism for numerically evolving initial data in
general relativity in which the (complex) Ashtekar connection and the
Newman-Penrose scalars are taken as the dynamical variables. In the generic
case three gauge constraints and twelve reality conditions must be solved. The
analysis is applied to ... | 1994-03-19 | 2010-04-06 | [
"gr-qc"
] | D.C. Salisbury and L. C. Shepley |
gr-qc/9403034 | About Loop States in Supergravity | The Wilson loop functionals in terms of Ashtekar's variables were the first
(formal) solutions to the quantized hamiltonian constraint of canonical
gravity. Here it is shown that the same functionals also solve the supergravity
constraints and some evidence is presented that they are artificially generated
by multiplyi... | 1994-03-18 | 2010-04-06 | [
"gr-qc"
] | Hans-Juergen Matschull |
gr-qc/9403038 | Overview and Outlook | This report is based on the talk given by the author in the concluding
session of the workshop on Canonical Methods in Classical and Quantum General
Relativity, held a Bad-Honef, Germany, in September 93. It contains an
assessment of the canonical approach in general, an overview of recent
developments within the canon... | 1994-03-18 | 2009-10-22 | [
"gr-qc"
] | Abhay Ashtekar |
gr-qc/9403039 | Quasilocal energy conditions | The classical value of the Hamiltonian for a system with timelike boundary
has been interpreted as a quasilocal energy. This quasilocal energy is not
positive definite. However, we derive a `quasilocal dominant energy condition'
which is the natural consequence of the local dominant energy condition. We
discuss some im... | 1994-03-18 | 2009-10-22 | [
"gr-qc"
] | Geoff Hayward |
gr-qc/9403036 | Covariant methods for calculating the low-energy effective action in
quantum field theory and quantum gravity | We continue the development of the effective covariant methods for
calculating the heat kernel and the one-loop effective action in quantum field
theory and quantum gravity. The status of the low-energy approximation in
quantum gauge theories and quantum gravity is discussed in detail on the basis
of analyzing the loca... | 1994-03-18 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | I. G. Avramidi |
gr-qc/9403035 | Covariant algebraic calculation of the one-loop effective potential in
non-Abelian gauge theory and a new approach to stability problem | We use our recently proposed algebraic approach for calculating the heat
kernel associated with the Laplace operator to calculate the one-loop effective
action in the non-Abelian gauge theory. We consider the most general case of
arbitrary space-time dimension, arbitrary compact simple gauge group and
arbitrary matter ... | 1994-03-18 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | I. G. Avramidi |
gr-qc/9403037 | Radiation Field on Superspace | We study the dynamics of multiwormhole configurations within the framework of
the Euclidean Polyakov approach to string theory, incorporating a modification
to the Hamiltonian which makes it impossible to interpret the Coleman Alpha
parameters of the effective interactions as a quantum field on superspace,
reducible to... | 1994-03-18 | 2007-05-23 | [
"gr-qc"
] | P.F. Gonzalez-Diaz |
gr-qc/9403033 | Gravitational Waves from Inspiralling Compact Binaries: A Post-Newtonian
Approach | Inspiralling binary systems of neutron stars or black holes are promising
sources of gravitational radiation detectable by large-scale laser
interferometric gravitational observatories, such as the US LIGO and
Italian-French VIRGO projects. Accurate theoretical gravitational-waveform
templates will be needed to carry o... | 1994-03-17 | 2009-09-25 | [
"gr-qc"
] | Clifford M. WILL |
gr-qc/9403030 | Chaos and Quantum Chaos in Cosmological Models | Spatially homogeneous cosmological models reduce to Hamiltonian systems in a
low dimensional Minkowskian space moving on the total energy shell $H=0$. Close
to the initial singularity some models (those of Bianchi type VIII and IX) can
be reduced further, in a certain approximation, to a non-compact triangular
billiard... | 1994-03-16 | 2015-06-25 | [
"gr-qc"
] | R. Graham |
gr-qc/9403032 | Kinetic vs. Thermal-Field-Theory Approach to Cosmological Perturbations | A closed set of equations for the evolution of linear perturbations of
homogeneous, isotropic cosmological models can be obtained in various ways. The
simplest approach is to assume a macroscopic equation of state, e.g.\ that of a
perfect fluid. For a more refined description of the early universe, a
microscopic treatm... | 1994-03-16 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | Anton K. Rebhan and Dominik J. Schwarz |
gr-qc/9403029 | A Periodic Analog of the Schwarzschild Solution | We construct a new exact solution of Einstein's equations in vacuo in terms
of Weyl canonical coordinates. This solution may be interpreted as a black hole
in a space-time which is periodic in one direction and which behaves
asymptotically like the Kasner solution with Kasner index equal to $4M L^{-1}$,
where $L$ is th... | 1994-03-16 | 2009-09-25 | [
"gr-qc"
] | D. Korotkin and H. Nicolai (University of Hamburg, Germany) |
gr-qc/9403031 | Dilaton Production in String Cosmology | We consider the coupled evolution of density, (scalar) metric and dilaton
perturbations in the transition from a ``stringy" phase of growing curvature
and gravitational coupling to the standard radiation-dominated cosmology. We
show that dilaton production, with a spectrum tilted towards large frequencies,
emerges as a... | 1994-03-16 | 2016-08-31 | [
"gr-qc",
"astro-ph",
"hep-th"
] | M. Gasperini and G. Veneziano |
gr-qc/9403028 | Some Properties of Noether Charge and a Proposal for Dynamical Black
Hole Entropy | We consider a general, classical theory of gravity with arbitrary matter
fields in $n$ dimensions, arising from a diffeomorphism invariant Lagrangian,
$\bL$. We first show that $\bL$ always can be written in a ``manifestly
covariant" form. We then show that the symplectic potential current
$(n-1)$-form, $\th$, and the ... | 1994-03-15 | 2009-10-22 | [
"gr-qc"
] | Vivek Iyer and Robert M. Wald |
gr-qc/9403027 | Thermodynamics and Evaporation of the 2+1-D Black Hole | The properties of canonical and microcanonical ensembles of a black hole with
thermal radiation and the problem of black hole evaporation in 3-D are studied.
In 3-D Einstein-anti-de Sitter gravity we have two relevant mass scales,
$m_c=1/G$, and $m_p=(\hbar^2\Lambda/G)^{1/3}$, which are particularly relevant
for the ev... | 1994-03-13 | 2016-08-24 | [
"gr-qc",
"hep-th"
] | Benni Reznik |
gr-qc/9403026 | Some Spinor-Curvature Identities | We describe a class of spinor-curvature identities which exist for Riemannian
or Riemann-Cartan geometries. Each identity relates an expression quadratic in
the covariant derivative of a spinor field with an expression linear in the
curvature plus an exact differential. Certain special cases in 3 and 4
dimensions which... | 1994-03-13 | 2010-04-06 | [
"gr-qc"
] | James M. Nester, Roh Suan Tung and Vadim V. Zhytnikov |
gr-qc/9403025 | Lensing Properties of Lightlike Current Carrying Cosmic Strings | The lensing properties of superconducting cosmic strings endowed with a time
dependent pulse of lightlike current are investigated. The metric outside the
core of the string belongs to the $pp$--wave class, with a deficit angle. We
study the field theoretic bosonic Witten model coupled to gravity, and we show
that the ... | 1994-03-12 | 2010-04-06 | [
"gr-qc"
] | Jaume Garriga and Patrick Peter |
gr-qc/9403024 | Large Squeezing Behavior of Cosmological Entropy Generation | We consider the generation of entropy when particle pairs are created at a
cosmological level. Making a reduction via the particle number basis, we
compute the classical limit for the entropy generation due to the evolution of
the matter field fluctuations (squeeze transformation), obtaining that it is
linear in the sq... | 1994-03-11 | 2010-04-06 | [
"gr-qc"
] | M. Kruczenski, L.E. Oxman and M. Zaldarriaga |
gr-qc/9403023 | A test of a kind of the equivalence principle by long-baseline
neutrino-oscillation experiments | Possible breakdown of the universality of the gravitational couplings to
different neutrino flavors can be tested in long-baseline neutrino-oscillation
experiments, such as a proposed experiment at SOUDAN 2 or one at the DUMAND
project. Such a breakdown could be detected with sensitivity to the order of
$10^{-14}$ or $... | 1994-03-11 | 2007-05-23 | [
"gr-qc"
] | Osamu Yasuda |
gr-qc/9403021 | Observing Binary Inspiral with LIGO | Gravitational radiation from a binary neutron star or black hole system leads
to orbital decay and the eventual coalescence of the binary's components.
During the last several minutes before the binary components coalesce, the
radiation will enter the bandwidth of the United States Laser Inteferometer
Gravitational-wav... | 1994-03-10 | 2007-05-23 | [
"gr-qc",
"astro-ph"
] | Lee Samuel Finn |
gr-qc/9403022 | Geodesic Motion in the 5D Magnetized Schwarzschild-Like Solutions | Geodesics for a 5D magnetized Schwarzschild-like solution are analyzed by
reducing the problem to the motion of a test particle in an effective
potential. In absence of magnetic field comparison is established with
Schwarzschild's geometry. Embedding diagrams are constructed in order to
visualize the geometry of the me... | 1994-03-10 | 2010-11-01 | [
"gr-qc"
] | Tonatiuh Matos and Nora Breton |
gr-qc/9403019 | Structure of the Inner Singularity of a Spherical Black Hole | We review the evidence for and against the possibility that the inner
singularity of a black hole contains a lightlike segment which is locally mild
and characterized by mass inflation. | 1994-03-10 | 2009-10-22 | [
"gr-qc"
] | A. Bonanno, S. Droz, W. Israel and S.M. Morsink |
gr-qc/9403020 | Time (a-)symmetry in a recollapsing quantum universe | It is argued that Hawking's `greatest mistake' may not have been a mistake at
all. According to the canonical quantum theory of gravity for Friedmann type
universes, any time arrows of general nature can only be correlated with that
of the expansion. For recollapsing universes this seems to be facilitated in
part by qu... | 1994-03-10 | 2007-05-23 | [
"gr-qc"
] | H. D. Zeh |
gr-qc/9403017 | Collapse of Kaluza-Klein Bubbles | Kaluza-Klein theory admits ``bubble" configurations, in which the
circumference of the fifth dimension shrinks to zero on some compact surface. A
three parameter family of such bubble initial data at a moment of time-symmetry
(some including a magnetic field) has been found by Brill and Horowitz,
generalizing the (zero... | 1994-03-09 | 2010-01-06 | [
"gr-qc",
"hep-th"
] | Steven Corley and Ted Jacobson |
gr-qc/9403018 | Is the gravitational action additive? | The gravitational action is not always additive in the usual sense. We
provide a general prescription for the change in action that results when
different portions of the boundary of a spacetime are topologically identified.
We discuss possible implications for the superposition law of quantum gravity.
We present a def... | 1994-03-09 | 2009-10-22 | [
"gr-qc"
] | Dieter Brill and Geoff Hayward |
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