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/9408013 | Spin Networks, Turaev-Viro Theory and the Loop Representation | We investigate the Ponzano-Regge and Turaev-Viro topological field theories
using spin networks and their $q$-deformed analogues. I propose a new
description of the state space for the Turaev-Viro theory in terms of skein
space, to which $q$-spin networks belong, and give a similar description of the
Ponzano-Regge stat... | 1994-08-10 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | Timothy J. Foxon |
gr-qc/9408014 | Affine projection tensor geometry: Lie derivatives and isometries | The generalized projection-tensor geometry introduced in an earlier paper is
extended. A compact notation for families of projected objects is introduced
and used to summarize the results of the previous paper and obtain fully
projected decompositions of Lie derivatives of the projection tensor field, the
metric and th... | 1994-08-10 | 2009-10-22 | [
"gr-qc"
] | Robert H. Gowdy |
gr-qc/9408012 | General Relativistic Scalar Field Models in the Large | For a class of scalar fields including the massless Klein-Gordon field the
general relativistic hyperboloidal initial value problems are equivalent in a
certain sense. By using this equivalence and conformal techniques it is proven
that the hyperboloidal initial value problem for those scalar fields has an
unique solut... | 1994-08-10 | 2009-10-22 | [
"gr-qc"
] | Peter Huebner |
gr-qc/9408011 | Can the Interaction between Baby Universes Generate a Big Universe? | We explore a simple toy model of interacting universes to establish that a
small baby universe could become large ($\gg$ Planck length) if a third
quantization mechanism is taken into account. | 1994-08-09 | 2009-10-22 | [
"gr-qc"
] | Marco Cavaglia` |
gr-qc/9408010 | Nontrivial Dynamics in the Early Stages of Inflation | Inflationary cosmologies, regarded as dynamical systems, have rather simple
asymptotic behavior, insofar as the cosmic baldness principle holds.
Nevertheless, in the early stages of an inflationary process, the dynamical
behavior may be very complex. In this paper, we show how even a simple
inflationary scenario, based... | 1994-08-05 | 2009-10-22 | [
"gr-qc"
] | E. Calzetta and C. El Hasi |
gr-qc/9408009 | Analysis of the Non-singular Wyman-Schwarzschild Metric | The analog of the Schwarzschild metric is explored in the context of
Non-Singular Gravity. Analytic results are developed describing redshifts,
curvatures and topological features of the spacetime. All curvatures and
redshifts are finite so there are no Black Holes, no singularities and no
Hawking radiation. | 1994-08-05 | 2015-06-25 | [
"gr-qc"
] | Neil Cornish |
gr-qc/9408008 | Hamiltonian reduction of Bianchi Cosmologies | It was noted recently that the ADM-diffeomorphism-constraint does not
generate all observed symmetries for several Bianchi-models. We will suggest
not to use the ADM-constraint restricted to homogeneous variables, but some
equivalent which is derived from a restricted action principle. This will
generate all homogeneit... | 1994-08-04 | 2010-04-06 | [
"gr-qc"
] | J. Schirmer |
gr-qc/9408007 | Independent Loop Invariants for 2+1 Gravity | We identify an explicit set of complete and independent Wilson loop
invariants for 2+1 gravity on a three-manifold $M=\R\times\Sigma^g$, with
$\Sigma^g$ a compact oriented Riemann surface of arbitrary genus $g$. In the
derivation we make use of a global cross section of the $PSU(1,1)$-principal
bundle over Teichm\"ulle... | 1994-08-03 | 2010-04-06 | [
"gr-qc"
] | R. Loll |
gr-qc/9408005 | The Black Hole History in Tamed Vacuum | Quantum physics at scales large compared to the Planck scale is described in
the framework of classical space-time geometries. A criterion for selecting
these backgrounds out of quantized gravity is proposed. It leads to an
instability of the black-hole geometry, as experienced by motion across the
horizon, against emi... | 1994-08-03 | 2009-09-25 | [
"gr-qc",
"hep-th"
] | F.Englert |
gr-qc/9408006 | Finite Magnetic Flux Tube as a Black & White Dihole | A finite-length magnetic vortex line solution is derived within the context
of (4-dim) dilaton gravity. We approach the Bonnor metric at the
Einstein-Maxwell limit, and encounter the "flux tube as (Euclidean) Kerr
horizon" at the Kaluza-Klein level. Exclusively for string theory, the magnetic
flux tube world-sheet exhi... | 1994-08-03 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Aharon Davidson and Eduard Gedalin |
gr-qc/9408002 | Gravitational Energy in Spherical Symmetry | Various properties of the Misner-Sharp spherically symmetric gravitational
energy E are established or reviewed. In the Newtonian limit of a perfect
fluid, E yields the Newtonian mass to leading order and the Newtonian kinetic
and potential energy to the next order. For test particles, the corresponding
Hajicek energy ... | 1994-08-02 | 2009-10-22 | [
"gr-qc"
] | Sean A. Hayward |
gr-qc/9408003 | Self-Interaction Correction to Black Hole Radiance | We consider the modification of the formulas for black hole radiation, due to
the self-gravitation of the radiation. This is done by truncating the coupled
particle-hole system to a small set of modes, that are plausibly the most
significant ones, and quantizing the reduced system. In this way we find that
the particle... | 1994-08-02 | 2008-11-26 | [
"gr-qc",
"hep-th"
] | Per Kraus and Frank Wilczek |
gr-qc/9408004 | Dynamics of inhomogeneities of metric in the vicinity of a singularity
in multidimensional cosmology authors | The problem of construction of a general ihomogeneous solution of
$D$-dimensional Einstein equations in the vicinity of a cosmological
singularity is considered. It is shown that near the singularity a local
behavior of metric functions is described by a billiard on a space of a
constant negative curvature. The billiar... | 1994-08-01 | 2010-11-01 | [
"gr-qc"
] | A.A. Kirillov, V.N. Melnikov |
gr-qc/9408001 | On the Nature of Singularities in Plane Symmetric Scalar Field
Cosmologies | The nature of the initial singularity in spatially compact plane symmetric
scalar field cosmologies is investigated. It is shown that this singularity is
crushing and velocity dominated and that the Kretschmann scalar diverges
uniformly as it is approached. The last fact means in particular that a maximal
globally hype... | 1994-08-01 | 2010-11-01 | [
"gr-qc"
] | Alan D. Rendall |
gr-qc/9407042 | Simultaneous Hamiltonian Treatment of Class A Spacetimes and Reduction
of Degrees of Freedom at the Quantum Level | We consider the quantization of a general spatially homogeneous space-time
belonging to an arbitrary but fixed Class A Bianchi type. Exploiting the
information furnished by the quantum version of the momentum constraints, we
use as variables the two simplest contractions of $C^{\alpha}_{\beta \gamma}$
and $\gamma_{\alp... | 1994-07-28 | 2011-07-19 | [
"gr-qc",
"hep-th"
] | T.Christodoulakis, E.Korfiatis, E.C. Vagenas |
gr-qc/9407041 | A New Method of Generating Exact Inflationary Solutions | The mechanism of the initial inflation of the universe is based on
gravitationally coupled scalar fields $\phi$. Various scenarios are
distinguished by the choice of an {\it effective self--interaction potential}
$U(\phi)$ which simulates a {\it temporarily} non--vanishing {\em cosmological
term}. Using the Hubble expa... | 1994-07-27 | 2009-10-22 | [
"gr-qc",
"astro-ph",
"hep-th"
] | Franz E. Schunck and Eckehard W. Mielke |
gr-qc/9407040 | A Review of the Decoherent Histories Approach to Quantum Mechanics | I review the decoherent (or consistent) histories approach to quantum
mechanics, due to Griffiths, to Gell-Mann and Hartle, and to Omnes. This is an
approach to standard quantum theory specifically designed to apply to genuinely
closed systems, up to and including the entire universe. It does not depend on
an assumed s... | 1994-07-27 | 2011-04-15 | [
"gr-qc",
"cond-mat"
] | J.J.Halliwell |
gr-qc/9407039 | Generalized Uncertainty Relations and Long Time Limits for Quantum
Brownian Motion Models | We study the time evolution of the reduced Wigner function for a class of
quantum Brownian motion models. We derive two generalized uncertainty
relations. The first consists of a sharp lower bound on the uncertainty
function, $U = (\Delta p)^2 (\Delta q)^2 $, after evolution for time $t$ in the
presence of an environme... | 1994-07-26 | 2011-08-11 | [
"gr-qc",
"cond-mat"
] | C.Anastopoulos and J.J.Halliwell |
gr-qc/9407038 | Applications of a New Proposal for Solving the "Problem of Time" to Some
Simple Quantum Cosmological Models | We apply a recent proposal for defining states and observables in quantum
gravity to simple models. First, we consider a Klein-Gordon particle in an ex-
ternal potential in Minkowski space and compare our proposal to the theory ob-
tained by deparametrizing with respect to a time slicing prior to quantiza-
tion. We sho... | 1994-07-26 | 2009-10-22 | [
"gr-qc"
] | A. Higuchi and R.M. Wald |
gr-qc/9407037 | Wormhole Effects on Yang-Mills Theory | In this paper wormhole effects on $SO(3)$ YM theory are examined. The
wormhole wave functions for the scalar, the vector and the tensor expansion
modes are computed assuming a small gauge coupling which leads to an effective
decoupling of gravity and YM theory. These results are used to determine the
wormhole vertices ... | 1994-07-25 | 2010-11-01 | [
"gr-qc"
] | A. Lukas |
gr-qc/9407036 | Cosmological Sphaleron from Real Tunneling and Its Fate | We show that the cosmological sphaleron of Einstein-Yang-Mills system can be
produced from real tunneling geometries. The sphaleron will tend to roll down
to the vacuum or pure gauge field configuration, when the universe evolves in
the Lorentzian signature region with the sphaleron and the corresponding
hypersurface b... | 1994-07-25 | 2009-10-22 | [
"gr-qc"
] | Shuxue Ding (Tokyo Institute of Technology) |
gr-qc/9407034 | Functional Approach to Stochastic Inflation | We propose functional approach to the stochastic inflationary universe
dynamics. It is based on path integral representation of the solution to the
differential equation for the scalar field probability distribution. In the
saddle-point approximation scalar field probability distributions of various
type are derived an... | 1994-07-22 | 2010-01-15 | [
"gr-qc",
"hep-th"
] | Yuri V. Shtanov (Bogolyubov Institute, Kiev, Ukraine and Brown
University, Providence, RI) |
gr-qc/9407035 | A Comparison of Two Quantization Procedures for Lineal Gravity | We consider two programs for quantizing gravity in $1+1$ dimensions, which
have appeared in the literature: one using a gauge--theoretic approach and the
other following a more conventional ``geometric'' approach. We compare the wave
functionals produced by the two different programs by finding matrix elements
between ... | 1994-07-22 | 2009-10-22 | [
"gr-qc"
] | Eric Benedict |
gr-qc/9407032 | Gravity as a Higgs Field. II.Fermion-Gravitation Complex | Gravitation theory meets spontaneous symmetry breaking when the structure
group of the principal linear frame bundle $LX$ over a world manifold $X^4$ is
reducible to the Lorentz group $SO(3,1)$. The physical underlying reason of
this reduction is Dirac fermion matter possessing only exact Lorentz
symmetries. The associ... | 1994-07-22 | 2007-05-23 | [
"gr-qc"
] | G.Sardanashvily |
gr-qc/9407029 | Wormhole Solutions in the Kantowski--Sachs Spacetime | I present quantum wormhole solutions in the Kantowski--Sachs spacetime
generated from coupling the gravitational field to the axion and EM fields.
These solutions correspond to the classical ones found by Keay and Laflamme and
by Cavagli\`a et al. | 1994-07-21 | 2015-06-25 | [
"gr-qc",
"hep-th"
] | Marco Cavagli\`a |
gr-qc/9407030 | Quantum Electromagnetic Wormholes and Geometrical Description of the
Electric Charge | I present and discuss a class of solutions of the Wheeler-de Witt equation
describing wormholes generated by coupling of gravity to the electromagnetic
field for Kantowski-Sachs and Bianchi I spacetimes. Since the electric charge
can be viewed as electric lines of force trapped in a finite region of
spacetime, these so... | 1994-07-21 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Marco Cavagli\`a |
gr-qc/9407033 | Extra Dimensions and Possible Space-Time Signature Changes | Exact static, spherically symmetric solutions to the Einstein-Maxwell-scalar
equations, with a dilatonic-type scalar-vector coupling, in $D$-dimensional
gravity with a chain of $n$ Ricci-flat internal spaces are considered, with the
Maxwell field potential having two nonzero components: the temporal,
Coulomb-like one a... | 1994-07-21 | 2011-08-17 | [
"gr-qc"
] | K.A. Bronnikov |
gr-qc/9407031 | Yang--Mills Configurations from 3D Riemann--Cartan Geometry | Recently, the {\it spacelike} part of the $SU(2)$ Yang--Mills equations has
been identified with geometrical objects of a three--dimensional space of
constant Riemann--Cartan curvature. We give a concise derivation of this
Ashtekar type (``inverse Kaluza--Klein") {\it mapping} by employing a
$(3+1)$--decomposition of {... | 1994-07-21 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | E.W. Mielke, Y.N. Obukhov, and F.W. Hehl |
gr-qc/9407024 | Two-Dimensional Black Holes and Planar General Relativity | The Einstein-Hilbert action with a cosmological term is used to derive a new
action in 1+1 spacetime dimensions. It is shown that the two-dimensional theory
is equivalent to planar symmetry in General Relativity. The two-dimensional
theory admits black holes and free dilatons, and has a structure similar to
two-dimensi... | 1994-07-20 | 2010-04-06 | [
"gr-qc"
] | Jose' P. S. Lemos |
gr-qc/9407027 | Fully Electrified Neugebauer Spacetimes | Generalizing a method presented in an earlier paper, we express the complex
potentials E and Phi of all stationary axisymmetric electrovac spacetimes that
correspond to axis data of the form E(z,0) = (U-W)/(U+W) , Phi(z,0) = V/(U+W) ,
where U = z^{2} + U_{1} z + U_{2} , V = V_{1} z + V_{2} , W = W_{1} z + W_{2} ,
in te... | 1994-07-20 | 2009-10-22 | [
"gr-qc"
] | Frederick J. Ernst |
gr-qc/9407026 | Determining parameters of the Neugebauer family of vacuum spacetimes in
terms of data specified on the symmetry axis | We express the complex potential E and the metrical fields omega and gamma of
all stationary axisymmetric vacuum spacetimes that result from the application
of two successive quadruple-Neugebauer (or two double-Harrison) transformations
to Minkowski space in terms of data specified on the symmetry axis, which are
in tu... | 1994-07-20 | 2009-10-22 | [
"gr-qc"
] | Frederick J. Ernst |
gr-qc/9407025 | Decoherence of Homogeneous and Isotropic Geometries in the Presence of
Massive Vector Fields | Decoherence of Friedmann-Robertson-Walker (FRW) geometries due to massive
vector fields with $SO(3)$ global symmetry is discussed in the context of
Quantum Cosmology. (Talk presented at the 3rd National Meeting of Astronomy and
Astrophysics, July 1993, IST, Lisboa, Portugal. -- A more complete version will
be presented... | 1994-07-20 | 2007-05-23 | [
"gr-qc"
] | O. Bertolami and P.V. Moniz |
gr-qc/9407028 | Billiard Representation for Multidimensional Cosmology with
Multicomponent Perfect Fluid near the Singularity | The multidimensional cosmological model describing the evolution of $n$
Einstein spaces in the presence of multicomponent perfect fluid is considered.
When certain restrictions on the parameters of the model are imposed, the
dynamics of the model near the singularity is reduced to a billiard on the
$(n-1)$-dimensional ... | 1994-07-19 | 2010-04-06 | [
"gr-qc"
] | V. D. Ivashchuk and V. N. Melnikov |
gr-qc/9407023 | Closed Form Expression for the Momentum Radiated from Cosmic String
Loops | We modify the recent analytic formula given by Allen and Casper for the rate
at which piecewise linear cosmic string loops lose energy to gravitational
radiation to yield the analogous analytic formula for the rate at which loops
radiate momentum. The resulting formula (which is exact when the effects of
gravitational ... | 1994-07-19 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | Bruce Allen, Paul Casper, and Adrian Ottewill |
gr-qc/9407022 | A Note on Hartle-Hawking Vacua | The purpose of this note is to establish the basic properties--- regularity
at the horizon, time independence, and thermality--- of the generalized
Hartle-Hawking vacua defined in static spacetimes with bifurcate Killing
horizon admitting a regular Euclidean section. These states, for free or
interacting fields, are de... | 1994-07-19 | 2010-01-06 | [
"gr-qc",
"hep-th"
] | Ted Jacobson |
gr-qc/9407021 | Global properties of static spherically symmetric charged dilaton
spacetimes with a Liouville potential | We derive the global properties of static spherically symmetric solutions to
the Einstein-Maxwell-dilaton system in the presence of an arbitrary exponential
dilaton potential. We show that -- with the exception of a pure cosmological
constant `potential' -- no asymptotically flat, asymptotically de Sitter or
asymptotic... | 1994-07-16 | 2014-11-17 | [
"gr-qc",
"hep-th"
] | S.J. Poletti and D.L. Wiltshire |
gr-qc/9407020 | Slicing, Threading & Parametric Manifolds | We present a unified treatment of the slicing (3+1) and threading (1+3)
decompositions of spacetime in terms of foliations. It is well-known how to
decompose the metric and connection in the slicing picture; this is at the
heart of any initial-value problem in general relativity. We describe here the
analogous problem ... | 1994-07-15 | 2009-10-22 | [
"gr-qc"
] | Stuart Boersma and Tevian Dray |
gr-qc/9407018 | A Note on the Symmetries of the Gravitational Field of a Massless
Particle | It is shown that the metric of a massless particle obtained from boosting the
Schwarzschild metric to the velocity of light, has four Killing vectors
corresponding to an $E(2)\times \RR$ symmetry-group. This is in agreement with
the expectations based on flat-space kinematics but is in contrast to previous
statements i... | 1994-07-15 | 2010-04-06 | [
"gr-qc"
] | P.C.Aichelburg and H.Balasin |
gr-qc/9407016 | Horizon quantization and thermodynamics of the 2+1 black hole | We test on the 2+1 dimensional black hole the quantization method that we
have previously proposed in four dimensions. While in the latter case the
horizon dynamics is described, at the effective level, by the action of a
relativistic membrane, in the 2+1 case it is described by a string. We show
that this approach rep... | 1994-07-14 | 2007-05-23 | [
"gr-qc"
] | Michele Maggiore |
gr-qc/9407019 | Multidimensional Cosmology with Multicomponent Perfect Fluid and Toda
Lattices | The integration procedure for multidimensional cosmological models with
multicomponent perfect fluid in spaces of constant curvature is developed.
Reduction of pseudo-Euclidean Toda-like systems to the Euclidean ones is done.
Some known solutions are singled out from those obtained. The existence of the
wormholes is pr... | 1994-07-14 | 2015-06-25 | [
"gr-qc"
] | V.R. Gavrilov, V. D. Ivashchuk and V. N. Melnikov |
gr-qc/9407017 | Linear Bimetric Gravitation Theory | A general bimetric theory of gravitation is described as a linear in the
second approximation. This is allowed due to the small experimental
significance of the higher order terms. Solar System tests are satisfied. The
theory allows black holes, which are physical singularities. The predicted
black hole radius is equal... | 1994-07-14 | 2007-05-23 | [
"gr-qc"
] | N. Ionescu-Pallas, M.I. Piso, S. Onofrei |
gr-qc/9407015 | Simplicial Euclidean Relativistic Lagrangian | The paths on the {\bf R$^3$} real Euclidean manifold are defined as
2-dimensional simplicial strips; points are replaced by 2-simplexes and the
orbits of the action of a one discrete-parameter group on the base manifold
becomes a convex polyhedron attached to a 2-dimensional simplicial complex. The
Lagrangian of a movi... | 1994-07-13 | 2009-09-25 | [
"gr-qc",
"hep-th"
] | Marius. I. Piso |
gr-qc/9407013 | Gravity Balls | The existence of non trivial, non topological solutions in a class of
induced, effective gravity models arising out of a non minimally coupled scalar
field is established. We shall call such solutions ``Gravity Balls'' as the
effective gravitational constant inside the soliton differs from its effective
value outside. | 1994-07-13 | 2009-09-25 | [
"gr-qc"
] | Daksh Lohia |
gr-qc/9407014 | Non - Topological Solitons in non-minimally coupled Scalar fields:
Theory and consequences | In theories of gravitation in which dimensional parameters are dynamically
induced, one can have non - topological - soliton solutions. This article
reviews related topics connected with such solutions. The existence of such
solutions in curved spacetime can give rise to halos of gravity (g-) balls with
gravitational `... | 1994-07-13 | 2009-09-25 | [
"gr-qc"
] | Daksh Lohia |
gr-qc/9407009 | Instability Proof for Einstein-Yang-Mills Solitons with Arbitrary Gauge
Groups | We prove that static, spherically symmetric, asymptotically flat, regular
solutions of the Einstein-Yang-Mills equations are unstable for arbitrary gauge
groups, at least for the ``generic" case. This conclusion is derived without
explicit knowledge of the possible equilibrium solutions. | 1994-07-12 | 2007-05-23 | [
"gr-qc"
] | Othmar Brodbeck and Norbert Straumann |
gr-qc/9407012 | Parametric Manifolds II: Intrinsic Approach | A parametric manifold is a manifold on which all tensor fields depend on an
additional parameter, such as time, together with a parametric structure,
namely a given (parametric) 1-form field. Such a manifold admits natural
generalizations of Lie differentiation, exterior differentiation, and covariant
differentiation, ... | 1994-07-12 | 2009-10-22 | [
"gr-qc",
"dg-ga",
"math.DG"
] | Stuart Boersma and Tevian Dray |
gr-qc/9407010 | Four Dimensional Conformal Gravity, Confinement, and Galactic Rotation
Curves | We review the current status and prospects for the conformal invariant fourth
order theory of gravity which has recently been advanced by Mannheim and
Kazanas as a candidate alternative to the standard second order Einstein
theory. We examine how it is possible in principle to replace the Einstein
theory at all while r... | 1994-07-12 | 2009-09-25 | [
"gr-qc",
"astro-ph",
"hep-th"
] | Philip D. Mannheim (University of Connecticut) |
gr-qc/9407011 | Parametric Manifolds I: Extrinsic Approach | A parametric manifold can be viewed as the manifold of orbits of a (regular)
foliation of a manifold by means of a family of curves. If the foliation is
hypersurface orthogonal, the parametric manifold is equivalent to the
1-parameter family of hypersurfaces orthogonal to the curves, each of which
inherits a metric and... | 1994-07-12 | 2009-10-22 | [
"gr-qc",
"dg-ga",
"math.DG"
] | Stuart Boersma and Tevian Dray |
gr-qc/9407007 | Exact Solutions for Cosmological Perturbations with Collisionless Matter | All regular and singular cosmological perturbations in a radiation dominated
Einstein-de Sitter Universe with collisionless particles can be found by a
generalized power series ansatz. Talk given at "Birth of the Universe and
Fundamental Physics", May 1994 (Rome). | 1994-07-11 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | Dominik J. Schwarz |
gr-qc/9407008 | On Variational Principles for Gravitating Perfect Fluids | The connection is established between two different action principles for
perfect fluids in the context of general relativity. For one of these actions,
$S$, the fluid four--velocity is expressed as a sum of products of scalar
fields and their gradients (the velocity--potential representation). For the
other action, ${... | 1994-07-11 | 2008-02-03 | [
"gr-qc"
] | J. David Brown |
gr-qc/9407006 | Extended Geometry of Black Holes | We reconsider space-time singularities in classical Einsteinian general
relativity: with the help of several new co-ordinate systems we show that the
Schwarzschild solution can be extended beyond the curvature singularity at r=0.
The extension appears as an infinite covering of standard Kruskal space-time.
While the tw... | 1994-07-08 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | K. Peeters, C. Schweigert and J.W. van Holten |
gr-qc/9407004 | A Quadratic Spinor Lagrangian for General Relativity | We present a new finite action for Einstein gravity in which the Lagrangian
is quadratic in the covariant derivative of a spinor field. Via a new
spinor-curvature identity, it is related to the standard Einstein-Hilbert
Lagrangian by a total differential term. The corresponding Hamiltonian, like
the one associated with... | 1994-07-06 | 2010-11-01 | [
"gr-qc"
] | James M. Nester and Roh Suan Tung |
gr-qc/9407003 | Generation of Electro and Magneto Static Solutions of the Scalar-Tensor
Theories of Gravity | The field equations of the scalar-tensor theories of gravitation are
presented in different representations, related to each other by conformal
transformations of the metric. One of the representations resembles the
Jordan-Brans-Dicke theory, and is the starting point for the generation of
exact electrostatic and magne... | 1994-07-05 | 2007-05-23 | [
"gr-qc"
] | William Bruckman |
gr-qc/9407005 | A Class of Quasi-Stationary Regular Line Elements for the Schwarzschild
Geometry | A one-fold infinity of explicit quasi-stationary regular line elements for
the Schwarzschild geometry is obtained directly from the vacuum Einstein
equations. The class includes the familiar Eddington-Finkelstein coordinates,
and the coordinates discussed recently by Kraus and Wilczek. | 1994-07-05 | 2007-05-23 | [
"gr-qc"
] | Kayll Lake |
gr-qc/9407002 | Too Soon for Doom Gloom? | The observation that we are among the first 10^{11} or so humans reduces the
prior probability that we find ourselves in a species whose total lifetime
number of individuals is much higher, according to arguments of Carter, Leslie,
Nielsen, and Gott. However, if we instead start with a prior probability that a
history ... | 1994-07-04 | 2012-12-24 | [
"gr-qc"
] | Tomas Kopf, Pavel Krtous, and Don N. Page |
gr-qc/9407001 | Cat States and Single Runs for the Damped Harmonic Oscillator | We discuss the fate of initial states of the cat type for the damped harmonic
oscillator, mostly employing a linear version of the stochastic Schr\"odinger
equation. We also comment on how such cat states might be prepared and on the
relation of single realizations of the noise to single runs of experiments. | 1994-07-04 | 2009-10-22 | [
"gr-qc"
] | Peter Goetsch, Robert Graham, Fritz Haake |
gr-qc/9406054 | Preferred Basis in a Measurement Process | The effect of decoherence is analysed for a free particle, interacting with
an environment via a dissipative coupling. The interaction between the particle
and the environment occurs by a coupling of the position operator of the
particle with the environmental degrees of freedom. By examining the exact
solution of the ... | 1994-06-30 | 2009-10-22 | [
"gr-qc",
"cond-mat"
] | Anu Venugopalan |
gr-qc/9406053 | Topology Change in Classical General Relativity | This paper clarifies some aspects of Lorentzian topology change, and it
extends to a wider class of spacetimes previous results of Geroch and Tipler
that show that topology change is only to be had at a price. The scenarios
studied here are ones in which an initial spacelike surface is joined by a
connected ``interpola... | 1994-06-30 | 2007-05-23 | [
"gr-qc"
] | Arvind Borde |
gr-qc/9406052 | Classical solutions of gravitating Chern-Simons electrodynamics | We discuss the reduction of gravitating Chern-Simons electrodynamics with two
commuting Killing vectors to a dynamical problem with four degrees of freedom,
and present regular particle-like solutions. | 1994-06-29 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Gerard Clement |
gr-qc/9406046 | Energy-Momentum Complex in M\o ller's Tetrad Theory of Gravitation | M\o ller's Tetrad Theory of Gravitation is examined with regard to the
energy-momentum complex. The energy-momentum complex as well as the
superpotential associated with M\o ller's theory are derived. M\o ller's field
equations are solved in the case of spherical symmetry. Two different
solutions, giving rise to the sa... | 1994-06-28 | 2008-11-26 | [
"gr-qc"
] | F. I. Mikhail, M. I. Wanas, Ahmed Hindawi, and E. I. Lashin |
gr-qc/9406049 | Interior Structure of a Charged Spinning Black Hole in
$(2+1)$-Dimensions | The phenomenon of mass inflation is shown to occur for a rotating black hole.
We demonstrate this feature in $(2+1)$ dimensions by extending the charged
spinning BTZ black hole to Vaidya form. We find that the mass function diverges
in a manner quantitatively similar to its static counterparts in $(3+1)$,
$(2+1)$ and $... | 1994-06-28 | 2016-08-31 | [
"gr-qc",
"hep-th"
] | J.S.F. Chan, K.C.K. Chan and R.B. Mann |
gr-qc/9406047 | Quantization of Bianchi Models in N=1 Supergravity with a Cosmological
Constant | We study the quantization of some cosmological models within the theory of
N=1 supergravity with a positive cosmological constant. We find, by imposing
the supersymmetry and Lorentz constraints, that there are no physical states in
the models we have considered. For the k=1 Friedmann-Robertson-Walker model,
where the f... | 1994-06-28 | 2011-04-15 | [
"gr-qc"
] | A.D.Y. Cheng, P.D. D'Eath and P.R.L.V. Moniz |
gr-qc/9406048 | Quantization of a Locally Supersymmetric Friedmann Model with
Supermatter | The general theory of N = 1 supergravity with supermatter is studied using a
canonical approach. The supersymmetry and gauge constraint generators are
found. The framework is applied to the study of a Friedmann minisuperspace
model. We consider a Friedmann k = + 1 geometry and a family of spin-0 as well
as spin-1 gauge... | 1994-06-28 | 2011-04-15 | [
"gr-qc"
] | A.D.Y. Cheng, P.D. D'Eath and P.R.L.V. Moniz |
gr-qc/9406051 | On description of spatial topologies in quantum gravity | A new approach is suggested which allows to describe phenomenologically
arbitrary topologies of the Universe. It consists in a generalizaton of third
quantization. This quantization is carried out for the case of asymptotic
closeness to a cosmological singularity. It is also pointed out that suggested
approach leads to... | 1994-06-27 | 2007-05-23 | [
"gr-qc"
] | A.A. Kirillov |
gr-qc/9406050 | Multitemporal generalization of Schwarzschild solution | The $n$-time generalization of Schwarzschild solution is considered. The
equations of geodesics for the metric are integrated. The multitemporal
analogues of Newton laws for the extended objects described by the solution are
suggested. The scalar-vacuum generalization of the solution is also presented. | 1994-06-27 | 2009-10-22 | [
"gr-qc"
] | Vladimir D. Ivashchuk and Vitaly N. Melnikov |
gr-qc/9406045 | Hypertime Formalism for Spherically Symmetric Black Holes and Wormholes | Recent work on an approach to the geometrodynamics of cylindrical gravity
waves in the presence of interacting scalar matter fields, based on the
Kucha\v{r} hypertime formalism, is extended to the analogous spherically
symmetric system. This produces a geometrodynamical formalism for spherical
black holes and wormholes... | 1994-06-27 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | Stephen P. Braham |
gr-qc/9406044 | Fundamental Constants and the Problem of Time | We point out that for a large class of parametrized theories, there is a
constant in the constrained Hamiltonian which drops out of the classical
equations of motion in configuration space. Examples include the mass of a
relativistic particle in free fall, the tension of the Nambu string, and
Newton's constant for the ... | 1994-06-24 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | A. Carlini and J. Greensite |
gr-qc/9406043 | The Geometry of classical change of signature | The proposal of the possibility of change of signature in quantum cosmology
has led to the study of this phenomenon in classical general relativity theory,
where there has been some controversy about what is and is not possible. We
here present a new analysis of such a change of signature, based on previous
studies of ... | 1994-06-23 | 2014-11-17 | [
"gr-qc"
] | M.Carfora, G.F.R.Ellis |
gr-qc/9406042 | A Simple Stationary Line Element for the Schwarzschild Geometry, and
Some Applications | Guided by a Hamiltonian treatment of spherically symmetric geometry, we find
a remarkably simple -- stationary, but not static -- form for the line element
of Schwarzschild (and Reissner-Nordstrom) geometry. The line element continues
smoothly through the horizon; by exploiting this feature we are able to give a
very s... | 1994-06-23 | 2009-09-25 | [
"gr-qc",
"hep-th"
] | Per Kraus and Frank Wilczek |
gr-qc/9406041 | Comments on "Objectification of classical properties induced by quantum
vacuum fluctuations" | We argue that in standard quantum electrodynamics radiative corrections do
not lead to decoherence of unexcited atomic systems. The proposal of Santos
relies upon deliberate switching on and off the vacuum interactions. | 1994-06-23 | 2011-08-04 | [
"gr-qc"
] | Lajos Di\'osi |
gr-qc/9406038 | An analytical expression for the third coefficient of the Jones
Polynomial | An analytical expression for the third coefficient of the Jones Polynomial
$P_J[\gamma,\, {\em e}^q]$ in the variable $q$ is reported. Applications of the
result in Quantum Gravity are considered. | 1994-06-22 | 2009-10-22 | [
"gr-qc"
] | C. Di Bartolo and J. Griego |
gr-qc/9406040 | A Striking Property of the Gravitational Hamiltonian | {\sl A Hamiltonian framework for 2+1 dimensional gravity coupled with matter
(satisfying positive energy conditions) is considered in the asymptotically
flat context. It is shown that the total energy of the system is non-negative,
vanishing if and only if space-time is (globally) Minkowskian. Furthermore,
contrary to ... | 1994-06-22 | 2011-04-15 | [
"gr-qc"
] | Abhay Ashtekar and Madhavan Varadarajan |
gr-qc/9406039 | The Extended Loop Representation of Quantum Gravity | A new representation of Quantum Gravity is developed. This formulation is
based on an extension of the group of loops. The enlarged group, that we call
the Extended Loop Group, behaves locally as an infinite dimensional Lie group.
Quantum Gravity can be realized on the state space of extended loop dependent
wavefunctio... | 1994-06-22 | 2009-10-22 | [
"gr-qc"
] | C. Di Bartolo, R. Gambini and J. Griego |
gr-qc/9406033 | Spin-Coefficient Form of the New Laws of Black-Hole Dynamics | General laws of black-hole dynamics, some of which are analogous to the laws
of thermodynamics, have recently been found for a general definition of black
hole in terms of a future outer trapping horizon, a hypersurface foliated by
marginal surfaces of a certain type. This theory is translated here into
spin-coefficien... | 1994-06-21 | 2010-04-06 | [
"gr-qc"
] | Sean A. Hayward |
gr-qc/9406035 | A reinterpretation of the Taub singularity | We reinterpret the well known Taub-singularity in terms of a cylinder
symmetric geometry. It is shown that a cylindrical analog to the Einstein-Rosen
bridge as well as a cosmic string will be present in the geometry. | 1994-06-21 | 2016-08-14 | [
"gr-qc"
] | Bjorn Jensen and Jarom\'ir Ku\v{c}era |
gr-qc/9406037 | Why the Entropy of a Black Hole is $A/4$? | A black hole considered as a part of a thermodynamical system possesses the
Bekenstein-Hawking entropy $S_H =A_H /(4l_{\mbox{\scriptsize{P}}}^2)$, where
$A_H$ is the area of a black hole surface and $l_{\,\mbox{\scriptsize{P}}}$ is
the Planck length. Recent attempts to connect this entropy with dynamical
degrees of fre... | 1994-06-21 | 2011-05-05 | [
"gr-qc"
] | Valeri P.Frolov |
gr-qc/9406036 | A Cosmological No-Hair Theorem | A generalisation of Price's theorem is given for application to Inflationary
Cosmologies. Namely, we show that on a Schwarzschild--de Sitter background
there are no static solutions to the wave or gravitational perturbation
equations for modes with angular momentum greater than their intrinsic spin. | 1994-06-21 | 2009-10-22 | [
"gr-qc"
] | Chris M. Chambers and Ian G. Moss |
gr-qc/9406034 | Uniqueness of the non-singular family and characterisation of
cosmological models | We prove that for an orthogonal spacetime metric separable in space and time
in comoving coordinates, the requirements of perfect fluid and non-singularity
single out the unique family of singularity free cosmological models. Further
homogeneous models could only be Bianchi I or FLRW while inhomogeneous ones can
be wit... | 1994-06-21 | 2008-02-03 | [
"gr-qc"
] | Naresh Dadhich and L.K. Patel |
gr-qc/9406031 | Quantum Geometrodynamics I: Quantum-Driven Many-Fingered Time | The classical theory of gravity predicts its own demise -- singularities. We
therefore attempt to quantize gravitation, and present here a new approach to
the quantization of gravity wherein the concept of time is derived by imposing
the constraints as expectation-value equations over the true dynamical degrees
of free... | 1994-06-20 | 2010-11-01 | [
"gr-qc"
] | Arkady Kheyfets and Warner A. Miller |
gr-qc/9406032 | Spin Dynamics of the LAGEOS Satellite in Support of a Measurement of the
Earth's Gravitomagnetism | LAGEOS is an accurately-tracked, dense spherical satellite covered with 426
retroreflectors. The tracking accuracy is such as to yield a medium term (years
to decades) inertial reference frame determined via relatively inexpensive
observations. This frame is used as an adjunct to the more difficult and data
intensive V... | 1994-06-20 | 2011-09-09 | [
"gr-qc"
] | Salman Habib, Daniel E. Holz, Arkady Kheyfets, Richard A. Matzner,
Warner A. Miller and Brian W. Tolman |
gr-qc/9406029 | Spacetime alternatives in relativistic particle motion | One of the reasons we expect a standard quantum mechanics, which predicts
probabilities for alternatives defined on spacelike slices, to be inadequate
for quantum gravity is that the notion of ``spacelike'' is ill-defined in a
theory where the metric itself is behaving quantum-mechanically. Spacetime
coarse grainings--... | 1994-06-17 | 2009-10-22 | [
"gr-qc"
] | John T. Whelan |
gr-qc/9406030 | Integrable Weyl Geometry in Multidimensional Cosmology. Numerical
Investigation | The evolution of 4-dimensional and (4+d)-dimensional (d=1,2) cosmological
models based on the integrable Weyl geometry are considered numerically both
for empty space-time and for scalar field with non minimal coupling with
gravity. | 1994-06-17 | 2011-07-19 | [
"gr-qc"
] | V. N. Melnikov, M. Yu. Konstantinov |
gr-qc/9406028 | A Neglected Route to Realism About Quantum Mechanics | Bell's Theorem assumes that hidden variables are not influenced by future
measurement settings. The assumption has sometimes been questioned, but the
suggestion has been thought outlandish, even by the taxed standards of the
discipline. (Bell thought that it led to fatalism.) The case for this reaction
turns out to be ... | 1994-06-17 | 2010-02-23 | [
"gr-qc"
] | Huw Price |
gr-qc/9406027 | Quantization of Field Theories Generalizing Gravity-Yang-Mills Systems
on the Cylinder | Pure gravity and gauge theories in two dimensions are shown to be special
cases of a much more general class of field theories each of which is
characterized by a Poisson structure on a finite dimensional target space. A
general scheme for the quantization of these theories is formulated. Explicit
examples are studied ... | 1994-06-16 | 2009-10-22 | [
"gr-qc"
] | P.Schaller and T.Strobl |
gr-qc/9406023 | Invariance properties of boundary sets of open embeddings of manifolds
and their application to the abstract boundary | The {\em abstract boundary\/} (or {\em {\em a\/}-boundary\/}) of Scott and
Szekeres \cite{Scott94} constitutes a ``boundary'' to any $n$-dimensional,
paracompact, connected, Hausdorff, $C^\infty$-manifold (without a boundary in
the usual sense). In general relativity one deals with a {\em space-% time\/}
$(\cM,g)$ (a 4... | 1994-06-16 | 2008-02-03 | [
"gr-qc"
] | Christopher J. Fama and Susan M. Scott |
gr-qc/9406024 | Stability of the Black Hole Horizon and the Landau Ghost | The stability of the black hole horizon is demanded by both cosmic censorship
and the generalized second law of thermodynamics. We test the consistency of
these principles by attempting to exceed the black hole extremality condition
in various process in which a U(1) charge is added to a nearly extreme
Reissner--Nordst... | 1994-06-16 | 2009-10-22 | [
"gr-qc",
"astro-ph",
"hep-th"
] | Jacob D. Bekenstein and Carl Rosenzweig |
gr-qc/9406025 | Topological Measure and Graph-Differential Geometry on the Quotient
Space of Connections | (This is a report for the Proceedings of ``Journees Relativistes 1993''
written in September 1993. Containes a short description of the results
published elsewhere in the joint paper with A. Ashtekar) Integral calculus on
the space of gauge equivalent connections is developed. By carring out a
non-linear generalization... | 1994-06-16 | 2011-04-15 | [
"gr-qc"
] | Jerzy Lewandowski |
gr-qc/9406026 | Differential Geometry for the Space of Connections Modulo Gauge
Transformations | (This short article is a continuation of a longer, review work, in the same
volume of Proceedings, by Ashtekar, Marolf and Mour\~ao [gr-qc/9403042]. All
the details and other results are to be found in joint papers of the author
with Abhay Ashtekar.) The projective limit technics derived for spaces of
connections are e... | 1994-06-16 | 2007-05-23 | [
"gr-qc"
] | Jerzy lewandowski |
gr-qc/9406022 | Testing Scalar-Tensor Gravity with Gravitational-Wave Observations of
Inspiralling Compact Binaries | Observations of gravitational waves from inspiralling compact binaries using
laser-interferometric detectors can provide accurate measures of parameters of
the source. They can also constrain alternative gravitation theories. We
analyse inspiralling compact %binaries in the context of the scalar-tensor
theory of Jordan... | 1994-06-15 | 2009-10-22 | [
"gr-qc"
] | Clifford M. Will |
gr-qc/9406021 | Mass inflation in (1+1)-dimensional Dilaton Gravity | We investigate the phenomenon of mass inflation in two-dimensional dilaton
theories of gravity. We consider two distinct black hole spacetimes and
construct the mass-inflation solution for each. Our analysis is extended to
include multi-horizon spacetimes. We find that the mass function diverges in a
manner quantitativ... | 1994-06-14 | 2009-10-22 | [
"gr-qc"
] | J.S.F. Chan and R.B. Mann |
gr-qc/9406019 | Von Neumann Algebra Automorphisms and Time-Thermodynamics Relation in
General Covariant Quantum Theories | We consider the cluster of problems raised by the relation between the notion
of time, gravitational theory, quantum theory and thermodynamics; in
particular, we address the problem of relating the "timelessness" of the
hypothetical fundamental general covariant quantum field theory with the
"evidence" of the flow of t... | 1994-06-14 | 2010-04-06 | [
"gr-qc"
] | A. Connes and C. Rovelli |
gr-qc/9406020 | Quantum State During and after $O(4)$-Symmetric Bubble Nucleation with
Gravitaional Effects | We extend our previous analysis of the quantum state during and after
$O(4)$-symmetric bubble nucleation to the case including gravitational effects.
We find that there exists a simple relationship between the case with and
without gravitational effects. In a special case of a conformally coupled
scalar field which is ... | 1994-06-14 | 2009-10-09 | [
"gr-qc"
] | Takahiro TANAKA and Misao SASAKI |
gr-qc/9406018 | On the Stability of Gravitating Nonabelian Monopoles | The behaviour of magnetic monopole solutions of the Einstein-Yang-Mills-Higgs
equations subject to linear spherically symmetric perturbations is studied.
Using Jacobi's criterion some of the monopoles are shown to be unstable.
Furthermore the numerical results and analytical considerations indicate the
existence of a s... | 1994-06-13 | 2010-11-01 | [
"gr-qc"
] | Helia Hollmann |
gr-qc/9406017 | S^1 \times S^2 as a bag membrane and its Einstein-Weyl geometry | In the hybrid skyrmion in which an Anti-de Sitter bag is imbedded into the
skyrmion configuration a S^{1}\times S^{2} membrane is lying on the
compactified spatial infinity of the bag [H. Rosu, Nuovo Cimento B 108, 313
(1993)]. The connection between the quark degrees of freedom and the mesonic
ones is made through the... | 1994-06-09 | 2011-07-19 | [
"gr-qc"
] | H.C. Rosu |
gr-qc/9406014 | Eigenvalues of the Weyl operator as observables of general relativity | We consider the eigenvalues of the three-dimensional Weyl operator defined in
terms of the (Euclidean) Ashtekar variables, and we study their dependence on
the gravitational field. We notice that these eigenvalues can be used as
gravitational variables, and derive explicit formulas for their Poisson
brackets and their ... | 1994-06-08 | 2010-04-06 | [
"gr-qc"
] | Roberto De Pietri & Carlo Rovelli |
gr-qc/9406013 | Non-Abelian Black Holes and Catastrophe Theory I : Neutral Type | We re-analyze the globally neutral non-Abelian black holes and present a
unified picture, classifying them into two types; Type I (black holes with
massless non-Abelian field) and Type II (black holes with ``massive"
non-Abelian field). For the Type II, there are two branches: The black hole in
the high-entropy branch ... | 1994-06-08 | 2009-10-22 | [
"gr-qc"
] | Takashi Torii, Kei-ichi Maeda and Takashi Tachizawa |
gr-qc/9406015 | The Classification of Decoherence Functionals: An Analogue of Gleason's
Theorem | Gell-Mann and Hartle have proposed a significant generalisation of quantum
theory with a scheme whose basic ingredients are `histories' and decoherence
functionals. Within this scheme it is natural to identify the space $\UP$ of
propositions about histories with an orthoalgebra or lattice. This raises the
important pro... | 1994-06-08 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Chris Isham, Noah Linden & Stefan Schreckenberg |
gr-qc/9406016 | Energy Theorem for 2+1 dimensional gravity | We prove a positive energy theorem in 2+1 dimensional gravity for open
universes and any matter energy-momentum tensor satisfying the dominant energy
condition. We consider on the space-like initial value surface a family of
widening Wilson loops and show that the energy-momentum of the enclosed
subsystem is a future d... | 1994-06-08 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | P. Menotti and D. Seminara |
gr-qc/9406011 | The Constraint of a General Effective Potential in Vector Torsion
Coupled Conformally Induced Gravity | It is found that the deviation of an effective potential from the quartic
form is related to the metric and vector torsion dependencies of the effective
potential in the vector torsion coupled conformally induced gravity. | 1994-06-07 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Jewan Kim, C. J. Park and Yongsung Yoon |
gr-qc/9406012 | Hawking-like effects and Unruh-like effects: toward experiments ? | The Hawking effect and the Unruh effect are two of the most important
predictions in the theoretical physics of the last quarter of the 20th century.
In parallel to the theoretical investigations there is great interest in the
possibility of revealing effects of this type in some sort of experiments. I
present a genera... | 1994-06-06 | 2008-02-03 | [
"gr-qc"
] | H.C. Rosu |
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