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/9406010 | Predictions from Quantum Cosmology | The world view suggested by quantum cosmology is that inflating universes
with all possible values of the fundamental constants are spontaneously created
out of nothing. I explore the consequences of the assumption that we are a
`typical' civilization living in this metauniverse. The conclusions include
inflation with ... | 1994-06-06 | 2010-11-01 | [
"gr-qc",
"astro-ph",
"hep-th"
] | Alexander Vilenkin |
gr-qc/9406009 | Gauge-Symmetry Breakdown at the Horizon of Extreme Black Holes | Static solutions of the Einstein-Yang-Mills-Higgs system containing extreme
black holes are studied. The field equations imply strong restrictions on
boundary values of all fields at the horizon. If the Yang-Mills radial electric
field $E$ is non-zero there, then all fields at the horizon take values in the
centralizer... | 1994-06-04 | 2010-04-06 | [
"gr-qc"
] | J. Bicak, C. Cris, P. Hajicek and A. Higuchi |
gr-qc/9406008 | Chaos in the Einstein Equations - Characterization and Importance? | Is it possible to define what we could mean by chaos in a space-time metric
(even in the simplest toy-model studies)? Is it of importance for phenomena we
may search for in Nature? | 1994-06-04 | 2009-09-25 | [
"gr-qc",
"chao-dyn",
"hep-th",
"nlin.CD"
] | Svend E. Rugh |
gr-qc/9406006 | Topology Change in (2+1)-Dimensional Gravity | In (2+1)-dimensional general relativity, the path integral for a manifold $M$
can be expressed in terms of a topological invariant, the Ray-Singer torsion of
a flat bundle over $M$. For some manifolds, this makes an explicit computation
of transition amplitudes possible. In this paper, we evaluate the amplitude for
a s... | 1994-06-03 | 2010-04-28 | [
"gr-qc"
] | S. Carlip and R. Cosgrove |
gr-qc/9406004 | Causality Properties of Topologically Nontrivial Space-Time Models | The causality properties of space-time models with traversable wormholes are
considered. It is shown that relativity principle cannot be applied to the
motion of the wormhole's mouths in the outer space and the dynamical wormhole
transformation into the time machine is impossible. The examples of both causal
and noncau... | 1994-06-03 | 2011-04-20 | [
"gr-qc"
] | M. Yu. Konstantinov |
gr-qc/9406007 | Non-Singular Gravity Without Black Holes | A non-singular, static spherically symmetric solution to the nonsymmetric
gravitational and electromagnetic theory field equations is derived, which
depends on the four parameters m, l^2, Q and s, where m is the mass, Q is the
electric charge, l^2 is the NGT charge of a body and s is a dimensionless
constant. The elect... | 1994-06-03 | 2008-11-26 | [
"gr-qc"
] | N. J. Cornish and J. W. Moffat |
gr-qc/9406005 | Greens Function for Anti de Sitter Gravity | We solve for the retarded Greens function for linearized gravity in a
background with a negative cosmological constant, anti de Sitter space. In this
background, it is possible for a signal to reach spatial infinity in a finite
time. Therefore the form of the Greens function depends on a choice of boundary
condition at... | 1994-06-03 | 2011-09-09 | [
"gr-qc"
] | Gary Kleppe |
gr-qc/9406003 | Finding Principal Null Direction for Numerical Relativists | We present a new method for finding principal null directions (PNDs). Because
our method assumes as input the intrinsic metric and extrinsic curvature of a
spacelike hypersurface, it should be particularly useful to numerical
relativists. We illustrate our method by finding the PNDs of the
Kastor-Traschen spacetimes, w... | 1994-06-02 | 2009-10-22 | [
"gr-qc"
] | Laurens Gunnarsen, Hisa-aki Shinkai and Kei-ichi Maeda |
gr-qc/9406002 | Is Quantum Mechanics Compatible with an Entirely Deterministic Universe? | A b s t r a c t It will be argued that 1) the Bell inequalities are not
equivalent with those inequalities derived by Pitowsky and others that indicate
the Kolmogorovity of a probability model, 2) the original Bell inequalities are
irrelevant to both the question of whether or not quantum mechanics is a
Kolmogorovian t... | 1994-06-02 | 2009-10-22 | [
"gr-qc"
] | Laszlo E. Szabo (Univ. of Pittsburgh / Eotvos Univ. Budapest) |
gr-qc/9406001 | Shannon-Wehrl entropy for cosmological and black hole squeezing | We discuss the Shannon-Wehrl entropy within the squeezing vocabulary for the
cosmological and black hole particle production. | 1994-06-01 | 2009-10-22 | [
"gr-qc"
] | Haret Rosu and Marco Reyes |
gr-qc/9405073 | An algebraic extension of Dirac quantization: Examples | An extension of the Dirac procedure for the quantization of constrained
systems is necessary to address certain issues that are left open in Dirac's
original proposal. These issues play an important role especially in the
context of non-linear, diffeomorphism invariant theories such as general
relativity. Recently, an ... | 1994-05-31 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | A. Ashtekar and Ranjeet S. Tate |
gr-qc/9405074 | Hollow cosmic string: the general-relativistic hollow cylinder | We determine the different possible space-time metrics inside an infinite
rotating hollow cylinder with given energy density and longitudinal and
azimuthal stresses, the metric outside the cylinder being chosen of the
spinning cosmic string type. The solutions we obtain for various domains of
values of the cylinder par... | 1994-05-31 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | G\'erard Cl\'ement and Ilhem Zouzou |
gr-qc/9405075 | The Behavior of a Spherical Hole in an Infinite Uniform Universe | In this paper, the behavior of a spherical hole in an otherwise infinite and
uniform universe is investigated. First, the Newtonian theory is developed. The
concept of negative gravity, an outward gravitational force acting away from
the center of the spherical hole, is presented, and the resulting expansion of
the hol... | 1994-05-31 | 2009-09-25 | [
"gr-qc"
] | Gilbert N. Lewis (Michigan Technological University, Houghton,
Michigan and Richard N. Lewis) |
gr-qc/9405070 | Aspects of Black Hole Quantum Mechanics and Thermodynamics in 2+1
Dimensions | We discuss the quantum mechanics and thermodynamics of the (2+1)-dimensional
black hole, using both minisuperspace methods and exact results from
Chern-Simons theory. In particular, we evaluate the first quantum correction to
the black hole entropy. We show that the dynamical variables of the black hole
arise from the ... | 1994-05-30 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | S. Carlip and C. Teitelboim |
gr-qc/9405071 | Quasi-Localisation of Bondi-Sachs Energy Loss | A formula is given for the variation of the Hawking energy along any
one-parameter foliation of compact spatial 2-surfaces. A surface for which one
null expansion is positive and the other negative has a preferred orientation,
with a spatial or null normal direction being called outgoing or ingoing as the
area increase... | 1994-05-30 | 2010-04-06 | [
"gr-qc"
] | Sean A. Hayward |
gr-qc/9405072 | Black hole thermal effects in the scattering picture | In the scattering picture, thermal radiation effects may be associated with
the `above barrier' reflection coefficient, which comes into play because of
complex turning points. This note contains several general remarks on the
application of the above statement to Schwarzschild black hole radiance | 1994-05-30 | 2008-02-03 | [
"gr-qc"
] | H.C. Rosu |
gr-qc/9405065 | Interior Solutions for Non-singular Gravity and the Dark Star
alternative to Black Holes | The general equations describing hydrostatic equilibrium are developed for
Non-singular Gravity. A new type of astrophysical structure, a Super Dense
Object (SDO) or "Dark Star", is shown to exist beyond Neutron star field
strengths. These structures are intrinsically stable against gravitational
collapse and represent... | 1994-05-27 | 2007-05-23 | [
"gr-qc",
"astro-ph"
] | Neil Cornish |
gr-qc/9405066 | Self Similar Solutions of the Evolution Equation of a Scalar Field in an
Expanding Geometry | We consider the functional Schrodinger equation for a self interacting scalar
field in an expanding geometry. By performing a time dependent scale
transformation on the argument of the field we derive a functional Schrodinger
equation whose hamiltonian is time independent but involves a time-odd term
associated to a co... | 1994-05-27 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | F. Braghin, C. Martin and D. Vautherin |
gr-qc/9405069 | Detection of Computer Generated Gravitational Waves in Numerical
Cosmologies | We propose to study the behavior of complicated numerical solutions to
Einstein's equations for generic cosmologies by following the geodesic motion
of a swarm of test particles. As an example, we consider a cylinder of test
particles initially at rest in the plane symmetric Gowdy universe on $T^3
\times R$. For a circ... | 1994-05-27 | 2009-10-22 | [
"gr-qc"
] | B.K. Berger, D. Garfinkle, V. Swamy |
gr-qc/9405068 | The Mixmaster cosmological metrics | This paper begins with a short presentation of the Bianchi IX or
``Mixmaster'' cosmological model, and some ways of writing the Einstein
equations for it. There is then an interlude describing how I came to a study
of this model, and then a report of some mostly unpublished work from a Ph.\ D.
thesis of D. M. (Prakash)... | 1994-05-27 | 2009-09-25 | [
"gr-qc"
] | Charles W. Misner |
gr-qc/9405062 | Post-Newtonian expansion of gravitational waves from a particle in
circular orbit around a Schwarzschild black hole | Based upon the formalism recently developed by one of us (MS), we
analytically perform the post-Newtonian expansion of gravitational waves from a
test particle in circular orbit of radius $r_0$ around a Schwarzschild black
hole of mass $M$. We calculate gravitational wave forms and luminosity up to
$v^8$ order beyond N... | 1994-05-26 | 2009-10-09 | [
"gr-qc"
] | Hideyuki Tagoshi and Misao Sasaki |
gr-qc/9405064 | Bremsstrahlung in the gravitational field of a cosmic string | In the framework of QED we investigate the bremsstrahlung process for an
electron passing by a straight static cosmic string. This process is precluded
in empty Minkowski space-time by energy and momentum conservation laws. It
happens in the presence of the cosmic string as a consequence of the conical
structure of spa... | 1994-05-26 | 2009-10-22 | [
"gr-qc"
] | J. Audretsch, U. Jasper, and V.D. Skarzhinsky |
gr-qc/9405063 | The abstract boundary---a new approach to singularities of manifolds | A new scheme is proposed for dealing with the problem of singularities in
General Relativity. The proposal is, however, much more general than this. It
can be used to deal with manifolds of any dimension which are endowed with
nothing more than an affine connection, and requires a family \calc\ of curves
satisfying a {... | 1994-05-26 | 2010-12-03 | [
"gr-qc"
] | Susan M. Scott and Peter Szekeres |
gr-qc/9405067 | Multitemporal generalization of the Tangherlini solution | The n-time generalization of the Tangherlini solution [1] is considered. The
equations of geodesics for the metric are integrated. For $n = 2$ it is shown
that the naked singularity is absent only for two sets of parameters,
corresponding to the trivial extensions of the Tangherlini solution. The motion
of a relativist... | 1994-05-26 | 2010-04-06 | [
"gr-qc"
] | Vladimir D. Ivashchuk and Vitaly N. Melnikov |
gr-qc/9405056 | Phase Transition in Conformally Induced Gravity with Torsion | We have considered the quantum behavior of a conformally induced gravity in
the minimal Riemann-Cartan space. The regularized one-loop effective potential
considering the quantum fluctuations of the dilaton and the torsion fields in
the Coleman-Weinberg sector gives a sensible phase transition for an
inflationary phase... | 1994-05-26 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | Jewan Kim, C.J. Park and Yongsung Yoon |
gr-qc/9405059 | Density Perturbations of Quantum Mechanical Origin and Anisotropy of the
Microwave Background | If the large-angular-scale anisotropy in the cosmic microwave background
radiation is caused by the long-wavelength cosmological perturbations of
quantum mechanical origin, they are, most likely, gravitational waves, rather
than density perturbations or rotational perturbations. | 1994-05-25 | 2010-11-19 | [
"gr-qc",
"astro-ph"
] | L. P. Grishchuk |
gr-qc/9405061 | Gravity-Driven Acceleration of the Cosmic Expansion | It is shown here that a dynamical Planck mass can drive the scale factor of
the universe to accelerate. The negative pressure which drives the cosmic
acceleration is identified with the unusual kinetic energy density of the
Planck field. No potential nor cosmological constant is required. This suggests
a purely gravity... | 1994-05-25 | 2010-11-01 | [
"gr-qc",
"astro-ph"
] | Janna Levin |
gr-qc/9405057 | General relativity as an effective field theory: The leading quantum
corrections | I describe the treatment of gravity as a quantum effective field theory. This
allows a natural separation of the (known) low energy quantum effects from the
(unknown) high energy contributions. Within this framework, gravity is a well
behaved quantum field theory at ordinary energies. In studying the class of
quantum c... | 1994-05-25 | 2010-11-01 | [
"gr-qc",
"hep-ph",
"hep-th"
] | John F. Donoghue |
gr-qc/9405058 | Unitarity Restoration in the Presence of Closed Timelike Curves | A proposal is made for a mathematically unambiguous treatment of evolution in
the presence of closed timelike curves. In constrast to other proposals for
handling the naively nonunitary evolution that is often present in such
situations, this proposal is causal, linear in the initial density matrix and
preserves probab... | 1994-05-25 | 2010-11-01 | [
"gr-qc"
] | Arlen Anderson |
gr-qc/9405060 | Disk collapse in general relativity | The radial collapse of a homogeneous disk of collisionless particles can be
solved analytically in Newtonian gravitation. To solve the problem in general
relativity, however, requires the full machinery of numerical relativity. The
collapse of a disk is the simplest problem that exhibits the two most
significant and ch... | 1994-05-25 | 2010-11-01 | [
"gr-qc"
] | Andrew M. Abrahams, Stuart L. Shapiro, and Saul A. Teukolsky |
gr-qc/9405055 | Confinement by Black Holes | The question of whether an observer can escape from a black hole is
addressed, using a recent general definition of a black hole in the form of a
future outer trapping horizon. An observer on a future outer trapping horizon
must enter the neighbouring trapped region. It is possible for the observer to
subsequently esca... | 1994-05-25 | 2007-05-23 | [
"gr-qc"
] | Sean A. Hayward |
gr-qc/9405053 | The Ultrarelativistic Kerr-Geometry and its Energy-Momentum Tensor | The ultrarelativistic limit of the Schwarzschild and the Kerr-geometry
together with their respective energy-momentum tensors is derived. The approach
is based on tensor-distributions making use of the underlying Kerr-Schild
structure, which remains stable under the ultrarelativistic boost. | 1994-05-24 | 2010-04-06 | [
"gr-qc"
] | H Balasin and H Nachbagauer |
gr-qc/9405054 | Is minimal coupling procedure compatible with minimal action principle? | When space-time is assumed to be non-Riemannian the minimal coupling
procedure (MCP) is not compatible, in general, with minimal action principle
(MAP). This means that the equations gotten by applying MCP to the
Euler-Lagrange equations of a Lagrangian $\cal L$ do not coincide with the
Euler-Lagrange equations of the ... | 1994-05-24 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Alberto Saa (Univ. Sao Paulo) |
gr-qc/9405050 | Do Inertial Electric Charges Radiate with Respect to Uniformly
Accelerated Observers? | We revisit the long standing problem of analyzing an inertial electric charge
from the point of view of uniformly accelerated observers in the context of
semi-classical gravity. We choose a suitable set of accelerated observers with
respect to which there is no photon emission coming from the inertial charge.
We discus... | 1994-05-23 | 2010-11-01 | [
"gr-qc"
] | George E.A. Matsas |
gr-qc/9405049 | On the Occurrence of Naked Singularity in Spherically Symmetric
Gravitational Collapse | Generalizing earlier results of Joshi and Dwivedi (Commun. Math. Phys. 146,
333 (1992); Lett. Math. Phys. 27, 235 (1993)), we analyze here the spherically
symmetric gravitational collapse of a matter cloud with a general form of
matter for the formation of a naked singularity. It is shown that this is
related basically... | 1994-05-23 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | I. H. Dwivedi and P. S. Joshi |
gr-qc/9405052 | Compact Homogeneous Universes | A thorough classification of the topologies of compact homogeneous universes
is given except for the hyperbolic spaces, and their global degrees of freedom
are completely worked out. To obtain compact universes, spatial points are
identified by discrete subgroups of the isometry group of the generalized
Thurston geomet... | 1994-05-23 | 2015-06-25 | [
"gr-qc"
] | Tatsuhiko Koike, Masayuki Tanimoto and Akio Hosoya |
gr-qc/9405051 | Collisions of boosted black holes: perturbation theory prediction of
gravitational radiation | We consider general relativistic Cauchy data representing two nonspinning,
equal-mass black holes boosted toward each other. When the black holes are
close enough to each other and their momentum is sufficiently high, an
encompassing apparent horizon is present so the system can be viewed as a
single, perturbed black h... | 1994-05-23 | 2009-12-30 | [
"gr-qc",
"astro-ph"
] | Andrew M. Abrahams and Gregory B. Cook |
gr-qc/9405047 | Standard and Generalized Newtonian Gravities as ``Gauge'' Theories of
the Extended Galilei Group - II: Dynamical Three-Space Theories | In a preceding paper we developed a reformulation of Newtonian gravitation as
a {\it gauge} theory of the extended Galilei group. In the present one we
derive two true generalizations of Newton's theory (a {\it ten-fields} and an
{\it eleven-fields} theory), in terms of an explicit Lagrangian realization of
the {\it ab... | 1994-05-22 | 2010-04-06 | [
"gr-qc"
] | R. De Pietri, L. Lusanna & M. Pauri |
gr-qc/9405046 | Standard and Generalized Newtonian Gravities as ``Gauge'' Theories of
the Extended Galilei Group - I: The Standard Theory | Newton's standard theory of gravitation is reformulated as a {\it gauge}
theory of the {\it extended} Galilei Group. The Action principle is obtained by
matching the {\it gauge} technique and a suitable limiting procedure from the
ADM-De Witt action of general relativity coupled to a relativistic mass-point. | 1994-05-22 | 2010-04-06 | [
"gr-qc"
] | R. De Pietri, L. Lusanna & M. Pauri |
gr-qc/9405048 | The Emergence of an Effective two - dimensional Quantum Description from
the study of Critical Phenomena in Black Holes | We study the occurrence of critical phenomena in four - dimensional, rotating
and charged black holes, derive the critical exponents and show that they
fulfill the scaling laws. Correlation functions critical exponents and
Renormalization Group considerations assign an effective (spatial) dimension,
$d=2$, to the syste... | 1994-05-22 | 2011-07-19 | [
"gr-qc",
"astro-ph",
"hep-th"
] | C. O. Lousto |
gr-qc/9405045 | Black hole formation from colliding bubbles | Some indication of conditions that are necessary for the formation of black
holes from the collision of bubbles during a supercooled phase transition in
the the early universe are explored. Two colliding bubbles can never form a
black hole. Three colliding bubbles can refocus the energy in their walls to
the extent tha... | 1994-05-21 | 2009-10-22 | [
"gr-qc"
] | Ian G. Moss |
gr-qc/9405044 | Conformal anomalies on Einstein spaces with Boundary | The anomalous rescaling for antisymmetric tensor fields, including gauge
bosons, and Dirac fermions on Einstein spaces with boundary has been prone to
errors and these are corrected here. The explicit calculations lead to some
interesting identities that indicate a deeper underlying structure. | 1994-05-21 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Ian G. Moss and Stephen J. Poletti |
gr-qc/9405043 | Time in (2+1)-Dimensional Quantum Gravity | General relativity in three spacetime dimensions is used to explore three
approaches to the ``problem of time'' in quantum gravity: the internal
Schr\"odinger approach with mean extrinsic curvature as a time variable, the
Wheeler-DeWitt equation, and covariant canonical quantization with ``evolving
constants of motion.... | 1994-05-20 | 2007-05-23 | [
"gr-qc"
] | S. Carlip |
gr-qc/9405042 | Singularity Free Quasi-Classical Schwarzschild Space-Times | Using canonical (Schrodinger) quantization of spherically symetric
gravitational dust systems, we find the quasi-classical (coherent) state,
|\alpha^{(s)}>, that corresponds to the classical Schwarzschild solution. We
calculate the ``quasi-classical Schwarzschild mertic", which is the expectation
value of the quantized... | 1994-05-20 | 2009-09-25 | [
"gr-qc",
"hep-th"
] | Yoav Peleg |
gr-qc/9405041 | Eternal Black Holes and Quasilocal Energy | We present the gravitational action and Hamiltonian for a spatially bounded
region of an eternal black hole. The Hamiltonian is of the general form
$H=H_{+} - H_{-}$, where $H_{+}$ and $H_{-}$ are respectively the Hamiltonians
for the regions $M_+$ and $M_-$ located in the left and right wedges of the
spacetime. We con... | 1994-05-19 | 2007-05-23 | [
"gr-qc"
] | Valeri Frolov and Erik A. Martinez |
gr-qc/9405040 | Wheeler-Dewitt Metric and the Attractivity of Gravity | We investigate the class of ultralocal metrics on the configuration space of
canonical gravity. It is described by a parameter $\alpha$, where $\alpha=0.5$
corresponds to general relativity.
For $\alpha$ less than a critical value the signature is positive definite,
while for all other values it is indefinite. We sho... | 1994-05-18 | 2009-10-22 | [
"gr-qc"
] | D. Giulini and C. Kiefer |
gr-qc/9405038 | General Cosmological Features of the Einstein-Yang-Mills-Dilaton System | We establish the main features of homogeneous and isotropic dilaton, metric
and Yang-Mills field configurations in a cosmological framework. Special
attention is paid to the energy exchange between the dilaton and the Yang-Mills
field and, in particular, a new energy exchange term is identified.
Implications for the Po... | 1994-05-18 | 2010-11-01 | [
"gr-qc"
] | M.C. Bento and O. Bertolami |
gr-qc/9405039 | Semiclassical Gravity and the Problem of Time | I give a brief review of the recovery of semiclassical time from quantum
gravity and discuss possible extrapolations of this concept to the full theory. | 1994-05-18 | 2007-05-23 | [
"gr-qc"
] | C. Kiefer |
gr-qc/9405037 | Analytic Results for the Gravitational Radiation from a Class of Cosmic
String Loops | Cosmic string loops are defined by a pair of periodic functions ${\bf a}$ and
${\bf b}$, which trace out unit-length closed curves in three-dimensional
space. We consider a particular class of loops, for which ${\bf a}$ lies along
a line and ${\bf b}$ lies in the plane orthogonal to that line. For this class
of cosmic ... | 1994-05-17 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | Bruce Allen, Paul Casper, and Adrian Ottewill |
gr-qc/9405036 | On the Role of Initial Data in the Gravitational Collapse of
Inhomogeneous Dust | We consider here the gravitational collapse of a spherically symmetric
inhomogeneous dust cloud described by the Tolman-Bondi models. By studying a
general class of these models, we find that the end state of the collapse is
either a black hole or a naked singularity, depending on the parameters of the
initial density ... | 1994-05-17 | 2009-10-22 | [
"gr-qc",
"astro-ph",
"hep-th"
] | P. S. Joshi and T. P. Singh |
gr-qc/9405034 | On Spacetimes Admitting Shear-free, Irrotational, Geodesic Timelike
Congruences | A comprehensive analysis of general relativistic spacetimes which admit a
shear-free, irrotational and geodesic timelike congruence is presented. The
equations governing the models for a general energy-momentum tensor are written
down. Coordinates in which the metric of such spacetimes takes on a simplified
form are es... | 1994-05-16 | 2010-04-06 | [
"gr-qc"
] | Alan A. Coley and Des J. Mc Manus |
gr-qc/9405035 | Shear-free, Irrotational, Geodesic, Anisotropic Fluid Cosmologies | General relativistic anisotropic fluid models whose fluid flow lines form a
shear-free, irrotational, geodesic timelike congruence are examined. These
models are of Petrov type D, and are assumed to have zero heat flux and an
anisotropic stress tensor that possesses two distinct non-zero eigenvalues.
Some general resul... | 1994-05-16 | 2010-04-06 | [
"gr-qc"
] | Des J. Mc Manus and Alan A. Coley |
gr-qc/9405032 | The Ernst Equation on a Riemann Surface | The Ernst equation is formulated on an arbitrary Riemann surface.
Analytically, the problem reduces to finding solutions of the ordinary Ernst
equation which are periodic along the symmetry axis. The family of (punctured)
Riemann surfaces admitting a non-trivial Ernst field constitutes a ``partially
discretized'' subsp... | 1994-05-13 | 2009-10-22 | [
"gr-qc"
] | D. Korotkin and H. Nicolai (Hamburg University) |
gr-qc/9405033 | Quasilocal Energy for a Kerr black hole | The quasilocal energy associated with a constant stationary time slice of the
Kerr spacetime is presented. The calculations are based on a recent proposal
\cite{by} in which quasilocal energy is derived from the Hamiltonian of
spatially bounded gravitational systems. Three different classes of boundary
surfaces for t... | 1994-05-13 | 2009-10-22 | [
"gr-qc"
] | Erik A. Martinez |
gr-qc/9405031 | New Loop Representations for 2+1 Gravity | Since the gauge group underlying 2+1-dimensional general relativity is
non-compact, certain difficulties arise in the passage from the connection to
the loop representations. It is shown that these problems can be handled by
appropriately choosing the measure that features in the definition of the loop
transform. Thus,... | 1994-05-12 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | A. Ashtekar and R. Loll |
gr-qc/9405029 | Quantum temporal logic and decoherence functionals in the histories
approach to generalised quantum theory | We analyse and develop the recent suggestion that a temporal form of quantum
logic provides the natural mathematical framework within which to discuss the
proposal by Gell-Mann and Hartle for a generalised form of quantum theory based
on the ideas of histories and decoherence functionals. Particular stress is
placed on... | 1994-05-11 | 2009-10-22 | [
"gr-qc"
] | Chris Isham and Noah Linden |
gr-qc/9405028 | Multidimensional Integrable Cosmological Models with Dynamical and
Spontaneous Compactification | Multidimensional cosmological models with $n (n > 1)$ spaces of constant
curvature are discussed classically and with respect to canonical quantization.
These models are integrable in the case of Ricci flat internal spaces. For
positive curvature in the external space we find exact solutions modelling
dynamical as well... | 1994-05-11 | 2009-09-25 | [
"gr-qc"
] | U. Bleyer, A. Zhuk |
gr-qc/9405030 | Linearized Constraints in the Connection Representation: Hamilton-Jacobi
Solution | Newman and Rovelli have used singular Hamilton-Jacobi transformations to
reduce the phase space of general relativity in terms of the Ashtekar
variables. Their solution of the gauge constraint cannot be inverted and indeed
has no Minkowski space limit. Nonetheless, we exhibit an explicit
Hamilton-Jacobi solution of all... | 1994-05-11 | 2010-11-01 | [
"gr-qc"
] | J.N. Goldberg and D.C. Robinson |
gr-qc/9405026 | The Vacuum of de~Sitter Space | To resolve infrared problems with the de~Sitter invariant vacuum, we argue
that the history of the de~Sitter phase is crucial. We illustrate how either
(1)~the diagonalization of the Hamiltonian for long-wavelength modes or (2)~an
explicit modification of the metric in the distant past leads to natural
infrared cutoffs... | 1994-05-10 | 2008-02-03 | [
"gr-qc",
"hep-th"
] | A. D. Dolgov, M. B. Einhorn, and V. I. Zakharov |
gr-qc/9405027 | Wormholes as Basis for the Hilbert Space in Lorentzian Gravity | We carry out to completion the quantization of a Friedmann-Robertson-Walker
model provided with a conformal scalar field, and of a Kantowski-Sachs
spacetime minimally coupled to a massless scalar field. We prove that the
Hilbert space determined by the reality conditions that correspond to
Lorentzian gravity admits a b... | 1994-05-10 | 2010-11-01 | [
"gr-qc"
] | Guillermo A Mena Marugan |
gr-qc/9405025 | Massless Fileds in Scalar-Tensor Cosmologies | We derive exact Friedmann--Robertson--Walker cosmological solutions in
general scalar--tensor gravity theories, including Brans--Dicke gravity, for
stiff matter or radiation. These correspond to the long or short wavelength
modes respectively of massless scalar fields. If present, the long wavelength
modes of such fiel... | 1994-05-10 | 2011-08-11 | [
"gr-qc"
] | Jose P. Mimoso and David Wands |
gr-qc/9405023 | Reduced phase space quantization of Ashtekar's gravity on de Sitter
background | We solve perturbative constraints and eliminate gauge freedom for Ashtekar's
gravity on de Sitter background. We show that the reduced phase space consists
of transverse, traceless, symmetric fluctuations of the triad and of
transverse, traceless, symmetric fluctuations of the connection. A part of
gauge freedom corres... | 1994-05-09 | 2014-11-17 | [
"gr-qc"
] | Ignati Grigentch and D.V.Vassilevich |
gr-qc/9405017 | Gravitational Force by Point Particle in Static Einstein Universe | The gravitaional force produced by a point particle, like the sun, in the
background of the static Einstein universe is studied. Both the approximate
solution in the weak field limit and exact solution are obtained. The main
properties of the solution are {\it i}) near the point particle, the metric
approaches the Schw... | 1994-05-09 | 2007-05-23 | [
"gr-qc"
] | Masakatsu Kenmoku, Kaori Otsuki and Rieko Sakai |
gr-qc/9405024 | The Path Integral Formulation of Gravitational Thermodynamics | The first objective of this article is to show that the black hole partition
function can be placed on a firm logical foundation by enclosing the black hole
in a spatially finite "box" or boundary. The presence of the box has the effect
of stabilizing the black hole and yields a system with a positive heat
capacity. Th... | 1994-05-09 | 2008-02-03 | [
"gr-qc",
"hep-th"
] | J.D. Brown and J.W. York |
gr-qc/9405022 | On Spontaneous Compactification in Multidimensional Cosmology | Mutidimensional cosmological models with $n\left( n\geq 2\right) $ Einstein
spaces $M_i\left( i=1,\ldots ,n\right) $ are investigated. The cosmological
constant and homogeneous minimally coupled scalar field as a matter sources are
considered. The scalar field has a potential of general form depending on the
scalar fie... | 1994-05-09 | 2008-02-03 | [
"gr-qc"
] | U. Bleyer, A. Zhuk |
gr-qc/9405021 | On Black Hole Stability in Multidimensional Gravity | 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. Their
properties and special cases are discussed. A family of multidimensional
dilatonic black-h... | 1994-05-09 | 2015-06-25 | [
"gr-qc"
] | U. Bleyer, K.A.Bronnikov, S.B.Fadeev, V.N. Melnikov |
gr-qc/9405016 | Behavior of Friedmann-Robertson-Walker Cosmological Models in
Scalar-Tensor Gravity | We analyze solutions to Friedmann-Robertson-Walker cosmologies in Brans-Dicke
theory, where a scalar field is coupled to gravity. Matter is modelled by a
$\gamma$-law perfect fluid, including false-vacuum energy as a special case.
Through a change of variables, we reduce the field equations from fourth order
to second ... | 1994-05-07 | 2011-07-19 | [
"gr-qc"
] | Shawn J. Kolitch and Douglas M. Eardley |
gr-qc/9405015 | The Chern-Simons Invariant as the Natural Time Variable for Classical
and Quantum Cosmology | We propose that the Chern-Simons invariant of the Ashtekar-Sen connection is
the natural internal time coordinate for classical and quantum cosmology. The
reasons for this are a number of interesting properties of this functional,
which we describe here. 1)It is a function on the gauge and diffeomorphism
invariant conf... | 1994-05-06 | 2011-07-19 | [
"gr-qc",
"hep-th"
] | Lee Smolin and Chopin Soo |
gr-qc/9405020 | Multidimensional Classical and Quantum Wormholes in Models with
Cosmological Constant | A multidimensional cosmological model with space-time consisting of $n (n \ge
2)$ Einstein spaces $M_{i}$ is investigated in the presence of a cosmological
constant $\Lambda$ and a homogeneous minimally coupled scalar field
$\varphi(t)$ as a matter source. Classical and quantum wormhole solutions are
obtained for $\Lam... | 1994-05-06 | 2009-10-22 | [
"gr-qc"
] | U. Bleyer, V. D. Ivashchuk, V. N. Melnikov, A. Zhuk |
gr-qc/9405019 | Classical and Quantum Behaviour of Multidimensional Integrable
Cosmologies | Multidimensional cosmological models with $n~(n > 1)$ Einstein spaces are
discussed classically and with respect to canonical quantization. These models
are integrable in the case of Ricci flat internal spaces. For negative
curvature of the external space we find exact classical solutions modelling
dynamical as well as... | 1994-05-06 | 2009-09-25 | [
"gr-qc"
] | U. Bleyer, A. Zhuk |
gr-qc/9405018 | Mass Bounds for Multidimensional Charged Dilatonic Black Holes | The multidimensional charged dilatonic black hole solution with $n$ internal
Ricci-flat spaces is considered. The bound on the mass of the black hole is
obtained. In the strong dilatonic coupling limit the critical mass becomes
zero. The case $n = \infty$ is also considered. | 1994-05-06 | 2014-11-17 | [
"gr-qc"
] | U. Bleyer, V. Ivashchuk |
gr-qc/9405012 | Non-commutative black holes in $D$ dimensions | Recently introduced classical theory of gravity in non-commutative geometry
is studied. The most general (four parametric) family of $D$ dibensional static
spherically symmetric spacetimes is identified and its properties are studied
in detail. For wide class of the choices of parameters, the corresponding
spacetimes h... | 1994-05-06 | 2007-05-23 | [
"gr-qc"
] | C. Klimcik, P. Kolnik, and A. Pompos |
gr-qc/9405014 | On the Limiting Solution of the Bartnik-McKinnon Family | We analyze the limiting solution of the Bartnik-McKinnon family and show that
its exterior is an extremal Reissner-Nordstr{\o}m black hole and not a new type
of non-abelian black hole as claimed in a recent article by Smoller and
Wasserman. | 1994-05-06 | 2010-11-01 | [
"gr-qc"
] | P. Breitenlohner and D. Maison |
gr-qc/9405013 | Gravity as a Higgs Field. I.the Geometric Equivalence Principle | {\it If gravity is a metric field by Einstein, it is a Higgs field.}
Gravitation theory meets spontaneous symmetry breaking in accordance with the
Equivalence Principle reformulated in the spirit of Klein-Chern geometries of
invariants. In gravitation theory, the structure group of the principal linear
frame bundle $LX... | 1994-05-06 | 2007-05-23 | [
"gr-qc"
] | G. Sardanashvily |
gr-qc/9405011 | Classical and Quantum Solutions of Conformally Related Multidimensional
Cosmological Models | Consider multidim. universes M= R x M_1 x ... x M_n with D = 1+ d_1 .. + d_n,
where M_i of dimension d_i are of have constant curvature and compact for i>1.
For Lagrangian models L(R,phi) on M which depend only on Ricci curvature R and
a scalar field phi, there exists an explicit description of conformal
equivalence, w... | 1994-05-05 | 2009-09-25 | [
"gr-qc"
] | U. Bleyer, M. Rainer, A. Zhuk |
gr-qc/9405009 | Constraints on Inflationary Solutions in the Presence of Shear and Bulk
Viscosity | Inflationary models and their claim to solve many of the outstanding problems
in cosmology have been the subject of a great deal of debate over the last few
years. A major sticking point has been the lack of both good observational and
theoretical arguments to single out one particular model out of the many that
solve ... | 1994-05-04 | 2008-11-26 | [
"gr-qc"
] | Henk van Elst, Peter Dunsby and Reza Tavakol |
gr-qc/9405008 | Conserved Quantities in Perturbed Inflationary Universes | Given that observations seem to favour a \index{density parameter}
$\Omega_0<1$, corresponding to an open universe, we consider gauge\hs invariant
perturbations of non\hs flat Robertson\hs Walker universes filled with a
general imperfect fluid which can also be taken to represent a scalar field.
Our aim is to set up th... | 1994-05-04 | 2010-11-01 | [
"gr-qc"
] | Peter Dunsby and Marco Bruni |
gr-qc/9405010 | Exotic Smoothness and Physics | The essential role played by differentiable structures in physics is reviewed
in light of recent mathematical discoveries that topologically trivial
space-time models, especially the simplest one, ${\bf R^4}$, possess a rich
multiplicity of such structures, no two of which are diffeomorphic to each
other and thus to th... | 1994-05-04 | 2009-10-22 | [
"gr-qc"
] | Carl H. Brans |
gr-qc/9405006 | Shrinking and the True Power Spectrum at Decoupling | In this paper we examine the change in the estimated spatial power spectra at
decoupling due to the effects of our clumpy universe which modify observational
distances. We find that scales at decoupling can be significantly underestmated
in our approximation of neglecting the shear of the ray bundle. We compare our
res... | 1994-05-03 | 2009-09-25 | [
"gr-qc",
"astro-ph"
] | B.A.C.C. Bassett, P.K.S. Dunsby and G.F.R. Ellis |
gr-qc/9405007 | Temperature, Energy, and Heat Capacity of Asymptotically Anti-De Sitter
Black Holes | We investigate the thermodynamical properties of black holes in (3+1) and
(2+1) dimensional Einstein gravity with a negative cosmological constant. In
each case, the thermodynamic internal energy is computed for a finite spatial
region that contains the black hole. The temperature at the boundary of this
region is defi... | 1994-05-03 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | J.D. Brown, J. Creighton and R.B. Mann |
gr-qc/9405004 | Singularity-Free Two Dimensional Cosmologies | We present a class of theories of two dimensional gravity which admits
homogeneous and isotropic solutions that are nonsingular and asymptotically
approach a FRW matter dominated universe at late times. These models are
generalizations of two dimensional dilaton gravity and both vacuum solutions
and those including con... | 1994-05-02 | 2011-07-19 | [
"gr-qc",
"hep-th"
] | R. Moessner and M. Trodden (Brown University) |
gr-qc/9405003 | Limiting Behavior of Solutions to the Einstein-Yang/Mills Equations | The ADM masses of particle-like solutions to the Einstein-Yang/Mills
Equations tend to 2 as the number of nodes of the solutions increases. The same
result is true for black hole solutions with event horizon less than 1. For
event horizon $\rho > 1$ the ADM masses converge to $\rho + \rho^{-1} .$ These
statements exten... | 1994-05-02 | 2015-08-28 | [
"gr-qc"
] | J. A. Smoller and A. G. Wasserman |
gr-qc/9405005 | A Closed-Form Expression for the Gravitational Radiation Rate from
Cosmic Strings | We present a new formula for the rate at which cosmic strings lose energy
into gravitational radiation, valid for all piecewise-linear cosmic string
loops. At any time, such a loop is composed of $N$ straight segments, each of
which has constant velocity. Any cosmic string loop can be arbitrarily-well
approximated by a... | 1994-05-02 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | Bruce Allen and Paul Casper |
gr-qc/9405002 | Real Formulations of Complex Gravity and a Complex Formulation of Real
Gravity | Two gauge and diffeomorphism invariant theories on the Yang-Mills phase space
are studied. They are based on the Lie-algebras $so(1,3)$ and
$\widetilde{so(3)}$ -- the loop-algebra of $so(3)$. Although the theories are
manifestly real, they can both be reformulated to show that they describe
complex gravity and an infin... | 1994-05-02 | 2009-10-22 | [
"gr-qc"
] | Peter Peldan |
gr-qc/9405001 | Kinks and Time Machines | We show that it is not possible to smooth out the metric on the
Deutsch-Politzer time machine to obtain an everywhere non-singular
asymptotically flat Lorentzian metric. | 1994-05-02 | 2009-10-07 | [
"gr-qc"
] | Andrew Chamblin, Gary Gibbons, Alan R. Steif |
gr-qc/9404065 | Energy-Momentum Restrictions on the Creation of Gott Time Machines | The discovery by Gott of a remarkably simple spacetime with closed timelike
curves (CTC's) provides a tool for investigating how the creation of time
machines is prevented in classical general relativity. The Gott spacetime
contains two infinitely long, parallel cosmic strings, which can equivalently
be viewed as point... | 1994-05-01 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Sean M. Carroll, Edward Farhi, Alan H. Guth, and Ken D. Olum |
gr-qc/9404064 | Comments on Omn\`es' Model for Uniqueness of Data | Standard methods of the theory of permanent state reduction are shown to
offer an alternative realization of Omn\`es' project. Our proposal, as simple
as Omn\`es' one, possesses closed master equation for the ensemble density
operator, assuring causality. | 1994-04-30 | 2007-05-23 | [
"gr-qc"
] | Lajos Di\'osi |
gr-qc/9404061 | The basis of nonlocal curvature invariants in quantum gravity theory | A complete basis of nonlocal invariants in quantum gravity theory is built to
third order in spacetime curvature and matter-field strengths. The nonlocal
identities are obtained which reduce this basis for manifolds with
dimensionality $2\omega<6$. The present results are used in heat-kernel theory,
theory of gauge fie... | 1994-04-29 | 2008-11-26 | [
"gr-qc"
] | A.O.Barvinsky, Yu.V.Gusev, G.A.Vilkovisky and V.V.Zhytnikov |
gr-qc/9404063 | Asymptotic behaviours of the heat kernel in covariant perturbation
theory | The trace of the heat kernel is expanded in a basis of nonlocal curvature
invariants of $N$th order. The coefficients of this expansion (the nonlocal
form factors) are calculated to third order in the curvature inclusive. The
early-time and late-time asymptotic behaviours of the trace of the heat kernel
are presented w... | 1994-04-29 | 2016-08-31 | [
"gr-qc"
] | A.O.Barvinsky, Yu.V.Gusev, G.A.Vilkovisky and V.V.Zhytnikov |
gr-qc/9404062 | Quantum scale of inflation and particle physics of the early universe | The quantum gravitational scale of inflation is calculated by finding a sharp
probability peak in the distribution function of chaotic inflationary
cosmologies driven by a scalar field with large negative constant $\xi$ of
nonminimal interaction. In the case of the no-boundary state of the universe
this peak correspond... | 1994-04-29 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | A.O.Barvinsky and A.Yu.Kamenshchik |
gr-qc/9404058 | Aspects of the Thermo-Dynamics of a Black Hole with a Topological Defect | Aspects of the thermo-dynamics of a black hole which is either pierced by a
cosmic gauge string or contains a global monopole are investigated. We also
make some comments on the physical significance of the fact that the
gravitational mass carried by a global monopole is negative. We note in
particular that the negativ... | 1994-04-28 | 2010-11-01 | [
"gr-qc"
] | Bj{\o}rn Jensen |
gr-qc/9404060 | Generalized coordinates on the phase space of Yang-Mills theory | We study the suitability of complex Wilson loop variables as (generalized)
coordinates on the physical phase space of $SU(2)$-Yang-Mills theory. To this
end, we construct a natural one-to-one map from the physical phase space of the
Yang-Mills theory with compact gauge group $G$ to a subspace of the physical
configurat... | 1994-04-28 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | R. Loll, J.M. Mourao (Penn State U.) and J.N. Tavares (Porto U.) |
gr-qc/9404059 | The constraint algebra of quantum gravity in the loop representation | We study the algebra of constraints of quantum gravity in the loop
representation based on Ashtekar's new variables. We show by direct computation
that the quantum commutator algebra reproduces the classical Poisson bracket
one, in the limit in which regulators are removed. The calculation illustrates
the use of severa... | 1994-04-28 | 2009-10-22 | [
"gr-qc"
] | Rodolfo Gambini, Alcides Garat and Jorge Pullin |
gr-qc/9404057 | From Vacuum Fluctuations to Radiation: Accelerated Detectors and Black
Holes | The vacuum fluctuations that induce the transitions and the thermalisation of
a uniformly accelerated two level atom are studied in detail. Their energy
content is revealed through the weak measurement formalism of Aharonov et al.
It is shown that each time the detector makes a transition it radiates a
Minkowski photon... | 1994-04-28 | 2009-09-25 | [
"gr-qc",
"hep-th"
] | S. Massar and R. Parentani |
gr-qc/9404056 | Velocity Dominance Near a Crushing Singularity | The asymptotic behavior of geometry near the boundary of maximal Cauchy
development is studied using a perturbative method, which at the zeroth order
reduces Einstein's equations to an exactly solvable set of
equations---Einstein's equations with all ``space" derivatives dropped. The
perturbative equations are solved t... | 1994-04-27 | 2007-05-23 | [
"gr-qc"
] | Boro Grubisic |
gr-qc/9404055 | The Sources of the a and B Degenerate Static Vacuum Fields | We attempt to a physical interpretation of some known static vacuum solutions
of Einstein's equations, namely, the A and B metrics of Ehlers and Kundt. All
of them have axial symmetry, so they can be transformed to the Weyl form. In
Weyl coordinates $\ln\sqrt{-g_{44}}$ obeys a Laplace equation, and from this a
source, ... | 1994-04-27 | 2007-05-23 | [
"gr-qc"
] | M. A. P. Martins |
gr-qc/9404053 | Quantum Observables and Recollapsing Dynamics | Within a simple quantization scheme, observables for a large class of finite
dimensional time reparametrization invariant systems may be constructed by
integration over the manifold of time labels. This procedure is shown to
produce a complete set of densely defined operators on a physical Hilbert space
for which an in... | 1994-04-27 | 2010-04-06 | [
"gr-qc"
] | Donald Marolf |
gr-qc/9404047 | Radiation collapse and gravitational waves in three dimensions | Two non-static solutions for three dimensional gravity coupled to matter
fields are given. One describes the collapse of radiation that results in a
black hole. This is the three dimensional analog of the Vaidya metric, and is
used to construct a model for mass inflation. The other describes plane
gravitational waves f... | 1994-04-26 | 2009-12-30 | [
"gr-qc"
] | Viqar Husain |
gr-qc/9404051 | Comment on ``Meaning of the Wave Function'' | We draw attention to an elementary flaw in a recently proposed experiment to
measure the wave function of a single quantum system. | 1994-04-26 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | J.Samuel and R.Nityananda |
gr-qc/9404050 | Stringy Quantum Cosmology of the Bianchi Class a | The quantum cosmology of the string effective action is considered within the
context of the Bianchi class A minisuperspace. An exact unified solution is
found for all Bianchi types and interpreted physically as a quantum wormhole.
The solution is generalized for types ${\rm VI_0}$ and ${\rm VII_0}$. The
Bianchi type I... | 1994-04-26 | 2009-09-25 | [
"gr-qc"
] | James E. Lidsey |
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