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 |
|---|---|---|---|---|---|---|
gr-qc/9312014 | Squeezed Vacua and the Quantum Statistics of Cosmological Particle
Creation | We use the language of squeezed states to give a systematic description of
two issues in cosmological particle creation: a) Dependence of particle
creation on the initial state specified. We consider in particular the number
state, the coherent and the squeezed state. b) The relation of spontaneous and
stimulated parti... | 1993-12-08 | 2014-11-17 | [
"gr-qc"
] | Be-lok Hu, G. Kang and Andrew Matacz |
gr-qc/9312013 | Representations of the $SU(N)$ $T$-algebra and the loop representation
in $1+1$-dimensions | We consider the phase-space of Yang-Mills on a cylindrical space-time ($S^1
\times {\bf R}$) and the associated algebra of gauge-invariant functions, the
$T$-variables. We solve the Mandelstam identities both classically and
quantum-mechanically by considering the $T$-variables as functions of the
eigenvalues of the ho... | 1993-12-07 | 2010-04-06 | [
"gr-qc"
] | J. Hallin |
gr-qc/9312012 | Causal Feature of Central Singularity and Gravitational Mass | Mass of singularity is defined, and its relation to whether the singularity
is spacelike, timelike or null is discussed for spherically symmetric
spacetimes.
It is shown that if the mass of singularity is positive
(negative) the singularity is non-timelike (non-spacelike).
The connection between the sign of the m... | 1993-12-05 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Tatsuhiko Koike, Hisashi Onozawa and Masaru Siino |
gr-qc/9312011 | Compact Three Dimensional Black Hole: Topology Change and Closed
Timelike Curve (minor changes) | We present a compactified version of the 3-dimensional black hole recently
found by considering extra identifications and determine the analytical
continuation of the solution beyond its coordinate singularity by extending the
identifications to the extended region of the spacetime. In the extended region
of the spacet... | 1993-12-04 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | Masaru Siino |
gr-qc/9312007 | Spacetime structure and Quantum physics | A description of electromagnetism as four-dimensional spacetime structure
leads to the dynamics of a charged particle being determined only by the
four-vector potential and the existence of an electromagnetic field depending
on the topological structure of the background spacetime. When the spacetime
structure of elect... | 1993-12-03 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Vu B Ho |
gr-qc/9312009 | On black hole singularities in quantum gravity | We show that absence of space-like boundaries in 1+1 dimensional dilaton
gravity implies a catastrophic event at the end point of black hole
evaporation. The proof is completely independent of the physics at Planck
scales, which suggests that the same will occur in any theory of quantum
gravity which only admits trivia... | 1993-12-03 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | J.G. Russo |
gr-qc/9312010 | On the principles of description of time and space relationships in
frames of general relativity | The problem of the referring of space and time relationships between physical
objects in a curved space-time is discussed. The basic notions of column and
weak column that could constitute the basis for consistent general relativistic
description of measurements of space and time relations are introduced and the
corres... | 1993-12-03 | 2007-05-23 | [
"gr-qc"
] | S.Tertychniy |
gr-qc/9312006 | Landau Level Ground--State Degeneracy, and Its Relevance for a General
Quantization Procedure | The quantum dynamics of a two-dimensional charged spin $1/2$ particle is
studied for general, symmetry--free curved surfaces and general, nonuniform
magnetic fields that are, when different from zero, orthogonal to the defining
two surface. Although higher Landau levels generally lose their degeneracy
under such genera... | 1993-12-03 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Robert Alicki, John R. Klauder and Jerzy Lewandowski |
gr-qc/9312008 | On Physical Equivalence between Nonlinear Gravity Theories | We argue that in a nonlinear gravity theory, which according to well-known
results is dynamically equivalent to a self-gravitating scalar field in General
Relativity, the true physical variables are exactly those which describe the
equivalent general-relativistic model (these variables are known as Einstein
frame). Whe... | 1993-12-03 | 2010-11-01 | [
"gr-qc"
] | Guido Magnano and Leszek M. Sokolowski |
gr-qc/9312003 | Penrose Inequality for Gravitational Waves | We investigate axially symmetric asymptotically flat vacuum self-gravitating
system. A class of initial data with apparent horizon was numerically
constructed. The examined solutions satisfy the Penrose inequality. The prior
analysis of a massive system and the present results suggest that either
massive or sourcefree ... | 1993-12-02 | 2010-04-06 | [
"gr-qc"
] | Janusz Karkowski, Piotr Koc, Zdobyslaw Swierczynski |
gr-qc/9312004 | Conformal Killing Vectors in Five-Dimensional Space | The solutions of generalized Killing equation have been obtained for line
element with initial $t^2 \oplus so(3)$ symmetry. The coefficients of the
metric $g$ corresponding to these vector fields are written down. | 1993-12-02 | 2007-05-23 | [
"gr-qc"
] | G. L. Rcheulishvili |
gr-qc/9312005 | Optimal Filters for the Detection of Continuous Gravitational Waves | We determine the transfer functions of two kinds of filters that can be used
in the detection of continuous gravitational radiation. The first one optimizes
the signal-to-noise ratio, and the second reproduces the wave with minimum
error. We analyse the behaviour of these filters in connection with actual
detection sch... | 1993-12-02 | 2009-09-25 | [
"gr-qc"
] | Nadja S. Magalhaes and Carlos O. Escobar |
gr-qc/9312002 | The Off-Shell Black Hole | The standard (Euclidean) action principle for the gravitational field implies
that for spacetimes with black hole topology, the opening angle at the horizon
and the horizon area are canonical conjugates. It is shown that the opening
angle bears the same relation to the horizon area that the time separation
bears to the... | 1993-12-01 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | S. Carlip and C. Teitelboim |
gr-qc/9312001 | Loop Representations | The loop representation plays an important role in canonical quantum gravity
because loop variables allow a natural treatment of the constraints. In these
lectures we give an elementary introduction to (i) the relevant history of
loops in knot theory and gauge theory, (ii) the loop representation of Maxwell
theory, and... | 1993-12-01 | 2009-10-22 | [
"gr-qc"
] | B. Bruegmann |
gr-qc/9311036 | Gravitational Field of a Moving Spinning Point Particle | The gravitational and electromagnetic fields of a moving charged spinning
point particle are obtained in the Lorentz covariant form by transforming the
Kerr--Newman solution in Boyer--Lindquist coordinates to the one in the
coordinate system which resembles the isotropic coordinates and then
covariantizing it. It is sh... | 1993-11-30 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Jaegu Kim |
gr-qc/9311037 | Affine Projection Tensor Geometry: Decomposing the Curvature Tensor When
the Connection is Arbitrary and the Projection is Tilted | This paper constructs the geometrically natural objects which are associated
with any projection tensor field on a manifold with any affine connection. The
approaches to projection tensor fields which have been used in general
relativity and related theories assume normal projection tensors of
co-dimension one and conn... | 1993-11-30 | 2009-10-22 | [
"gr-qc"
] | Robert H. Gowdy |
gr-qc/9311035 | A Hamiltonian Formulation of Topological Gravity | Topological gravity is the reduction of Einstein's theory to spacetimes with
vanishing curvature, but with global degrees of freedom related to the topology
of the universe. We present an exact Hamiltonian lattice theory for topological
gravity, which admits translations of the lattice sites as a gauge symmetry.
There ... | 1993-11-30 | 2010-04-06 | [
"gr-qc"
] | Henri Waelbroeck and Jose Antonio Zapata |
gr-qc/9311034 | Testing for Preferred-Frame Effects in Gravity with Artificial Earth
Satellites | As gravity is a long-range force, one might a priori expect the Universe's
global matter distribution to select a preferred rest frame for local
gravitational physics. At the post-Newtonian approximation, two parameters
suffice to describe the phenomenology of preferred-frame effects. One of them
has already been very ... | 1993-11-29 | 2009-12-30 | [
"gr-qc"
] | Thibault Damour and Gilles Esposito-Farese |
gr-qc/9311033 | B^F Theory and Flat Spacetimes | We propose a reduced constrained Hamiltonian formalism for the exactly
soluble $B \wedge F$ theory of flat connections and closed two-forms over
manifolds with topology $\Sigma^3 \times (0,1)$. The reduced phase space
variables are the holonomies of a flat connection for loops which form a basis
of the first homotopy g... | 1993-11-26 | 2015-06-25 | [
"gr-qc"
] | Henri Waelbroeck |
gr-qc/9311032 | Semi-Complex Analysis & Mathematical Physics (Corrected Version) | A theoretical framework based on a simple quasi-number algebra is
investigated in a treatment of space-time and gravity. | 1993-11-24 | 2008-02-03 | [
"gr-qc"
] | F. Antonuccio |
gr-qc/9311031 | Coordinate transformations in Schwarzschild singularity problem | A systematic approach to the coordinate transformations in the Schwarzschild
singularity problem is considered. It is shown that both singularities at r=0
and r=2m can be eliminated by suitable coordinate transformations. | 1993-11-23 | 2008-02-03 | [
"gr-qc"
] | Vu B Ho |
gr-qc/9311030 | A Kucha\v{r} Hypertime Formalism For Cylindrically Symmetric Spacetimes
With Interacting Scalar Fields | The Kucha\v{r} canonical transformation for vacuum geometrodynamics in the
presence of cylindrical symmetry is applied to a general non-vacuum case. The
resulting constraints are highly non-linear and non-local in the momenta
conjugate to the Kucha\v{r} embedding variables. However, it is demonstrated
that the constrai... | 1993-11-17 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Stephen P. Braham |
gr-qc/9311029 | Quantisation of 2+1 gravity for genus 2 | In [1,2] we established and discussed the algebra of observables for $2+1$
gravity at both the classical and quantum level, and gave a systematic
discussion of the reduction of the expected number of independent observables
to $6g - 6 (g > 1)$. In this paper the algebra of observables for the case
$g=2$ is reduced to a... | 1993-11-17 | 2013-11-13 | [
"gr-qc",
"hep-th"
] | J.E.Nelson and T.Regge |
gr-qc/9311028 | Acoustic propagation in fluids: an unexpected example of Lorentzian
geometry | It is a deceptively simple question to ask how acoustic disturbances
propagate in a non--homogeneous flowing fluid. If the fluid is barotropic and
inviscid, and the flow is irrotational (though it may have an arbitrary time
dependence), then the equation of motion for the velocity potential describing
a sound wave can ... | 1993-11-16 | 2016-08-31 | [
"gr-qc",
"hep-th"
] | Matt Visser |
gr-qc/9311027 | Gravitational Field of a Moving Point Particle | The gravitational field of a moving point particle is obtained in a Lorentz
covariant form for both uncharged and charged cases. It is shown that the
general relativistic proper time interval at the location of the particle is
the same as the special relativistic one and the gravitational and
electromagnetic self force... | 1993-11-16 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Jaegu Kim |
gr-qc/9311026 | van Vleck determinants: traversable wormhole spacetimes | Calculating the van Vleck determinant in traversable wormhole spacetimes is
an important ingredient in understanding the physical basis behind Hawking's
chronology protection conjecture. This paper presents extensive computations of
this object --- at least in the short--throat flat--space approximation. An
important t... | 1993-11-15 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Matt Visser |
gr-qc/9311025 | Particle Production and Positive Energy Theorems for Charged Black Holes
in deSitter | We study quantum mechanical and classical stability properties of
Reissner-Nordstrom deSitter spacetimes, which describe black holes with mass
$M$ and charge $Q$ in a background with cosmological constant $\Lambda \ge 0$.
There are two sources of particle production in these spacetimes; the black
hole horizon and the c... | 1993-11-15 | 2009-10-22 | [
"gr-qc"
] | David Kastor and Jennie Traschen |
gr-qc/9311024 | Junction Conditions of Friedmann-Robertson-Walker Space-Times | We complete a classification of junctions of two Friedmann-Robertson-Walker
space-times bounded by a spherical thin wall. Our analysis covers super-horizon
bubbles and thus complements the previous work of Berezin, Kuzumin and Tkachev.
Contrary to sub-horizon bubbles, various topology types for super-horizon
bubbles ar... | 1993-11-15 | 2010-11-01 | [
"gr-qc"
] | Nobuyuki Sakai and Kei-ichi Maeda |
gr-qc/9311023 | Tunnelling geometries II. Reduction methods for functional determinants | The reduction algorithms for functional determinants of differential
operators on spacetime manifolds of different topological types are presented,
which were recently used for the calculation of the no-boundary wavefunction
and the partition function of tunnelling geometries in quantum gravity and
cosmology. | 1993-11-14 | 2009-10-22 | [
"gr-qc"
] | A.O.Barvinsky |
gr-qc/9311022 | Tunnelling geometries I. Analyticity, unitarity and instantons in
quantum cosmology | We present a theory of tunnelling geometries originating from the no-boundary
quantum state of Hartle and Hawking. We reformulate the no-boundary
wavefunction in the representation of true physical variables and calculate it
in the one-loop approximation. For this purpose a special technique is
developed, which reduces... | 1993-11-14 | 2011-07-19 | [
"gr-qc"
] | A.O.Barvinsky and A.Yu.Kamenshchik |
gr-qc/9311019 | A Real Polynomial Formulation of General Relativity in terms of
Connections | I show in this letter that it is possible to construct a Hamiltonian
description for Lorentzian General Relativity in terms of two real $SO(3)$
connections. The constraints are simple polynomials in the basic variables. The
present framework gives us a new formulation of General Relativity that keeps
some of the intere... | 1993-11-11 | 2017-03-24 | [
"gr-qc"
] | J. Fernando Barbero |
gr-qc/9311021 | A completely solvable model with an infinite number of Dirac observables
for a real sector of complexified Ashtekar gravity | We introduce a reduced model for a real sector of complexified Ashtekar
gravity that does not correspond to a subset of Einstein's gravity but for
which the programme of canonical quantization can be carried out completely,
both, via the reduced phase space approach or along the lines of the algebraic
quantization prog... | 1993-11-11 | 2007-05-23 | [
"gr-qc"
] | T. Thiemann |
gr-qc/9311020 | Reality Conditions for Lorentzian and Euclidean Gravity in the Ashtekar
Formulation | Using Ashtekar variables, we analyze Lorentzian and Euclidean gravity in
vacuum up to a constant conformal transformation. We prove that the reality
conditions are invariant under a Wick rotation of the time, and show that the
compatibility of the algebra of commutators and constraints with the involution
defined by th... | 1993-11-11 | 2009-10-22 | [
"gr-qc"
] | Guillermo A. Mena Marugan |
gr-qc/9311018 | Wigner Functions in Curved Space-Time and Quantum Corrections to Thermal
Equilibrium | A brief review of the Wigner functions method in curved space-time.
Contribution to the 3rd International Wigner Symposium, 5th-11th September
1993, Oxford, UK. | 1993-11-11 | 2007-05-23 | [
"gr-qc"
] | Oleg A. Fonarev |
gr-qc/9311017 | What is the Geometry of Superspace ? | We investigate certain properties of the Wheeler-DeWitt metric (for constant
lapse) in canonical General Relativity associated with its non-definite nature.
Contribution to the conference on Mach's principle: "From Newtons Bucket to
Quantum Gravity", July 26-30 1993, Tuebingen, Germany | 1993-11-10 | 2010-11-01 | [
"gr-qc"
] | Domenico Giulini |
gr-qc/9311016 | Quantum Bubble Dynamics in 2+1 Dimensional Gravity I: Geometrodynamic
Approach | The Dirac quantization of a 2+1 dimensional bubble is performed. The bubble
consists of a string forming a boundary between two regions of space-time with
distinct geometries. The ADM constraints are solved and the coupling to the
string is introduced through the boundary conditions. The wave functional is
obtained and... | 1993-11-09 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | H. Zaidi, J. Gegenberg |
gr-qc/9311015 | A Clifford Dyadic Superfield from Bilateral Interactions of Geometric
Multispin Dirac Theory | Multivector quantum mechanics utilizes wavefunctions which are Clifford
aggregates (e.g. sum of scalar, vector, bivector). This is equivalent to multi-
spinors constructed of Dirac matrices, with the representation independent form
of the generators geometrically interpreted as the basis vectors of spacetime.
Multiple ... | 1993-11-09 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | William Pezzaglia and Alfred Differ |
gr-qc/9311011 | Negative Energy Densities in Extended Sources Generating Closed Timelike
Curves in General Relativity with and without Torsion | Near a spinning point particle in (2+1)-dimensional gravity (or near an
infinitely thin, straight, spinning string in 3+1 dimensions) there is a region
of space-time with closed timelike curves. Exact solutions for extended sources
with apparently physically acceptable energy-momentum tensors, have produced
the same ex... | 1993-11-08 | 2010-11-01 | [
"gr-qc"
] | Harald H. Soleng |
gr-qc/9311012 | Weakly decaying asymptotically flat static and stationary solutions to
the Einstein equations | The assumption that a solution to the Einstein equations is static (or
stationary) very strongly constrains the asymptotic behaviour of the metric. It
is shown that one need only impose very weak differentiability and decay
conditions {\it a priori} on the metric for the field equations to force the
metric to be analyt... | 1993-11-08 | 2010-04-06 | [
"gr-qc"
] | Daniel Kennefick and Niall \'O Murchadha |
gr-qc/9311014 | First class constraints in Regge calculus | Considered are I class constraints in the tetrad-connection formulation of
Regge calculus. One of these is well-known Gauss law which generates rotations
in the local frames associated with tetrahedrons in the continuous time 3D
section. Another two types of these are new, satisfied by definition of Regge
manifold and ... | 1993-11-08 | 2007-05-23 | [
"gr-qc"
] | V.Khatsymovsky |
gr-qc/9311013 | Trapped surfaces in spherical expanding open universes | Consider spherically symmetric initial data for a cosmology which, in the
large, approximates an open $k = -1 ,\Lambda = 0$ Friedmann-Lema{\^\i}tre
universe. Further assume that the data is chosen so that the trace of the
extrinsic curvature is a constant and that the matter field is at rest at this
instant of time. On... | 1993-11-08 | 2009-10-22 | [
"gr-qc"
] | Uwe Brauer, Edward Malec and Niall \'O Murchadha |
gr-qc/9311010 | Representation Theory of Analytic Holonomy C* Algebras | Integral calculus on the space of gauge equivalent connections is developed.
Loops, knots, links and graphs feature prominently in this description. The
framework is well--suited for quantization of diffeomorphism invariant theories
of connections.
The general setting is provided by the abelian C* algebra of function... | 1993-11-07 | 2016-08-31 | [
"gr-qc",
"alg-geom",
"hep-th",
"math.AG"
] | Abhay Ashtekar and Jerzy Lewandowski |
gr-qc/9311007 | Equivalent Quantisations of (2+1)-Dimensional Gravity | For spacetimes with the topology $\IR\!\times\!T^2$, the action of
(2+1)-dimensional gravity with negative cosmological constant $\La$ is written
uniquely in terms of the time-independent traces of holonomies around two
intersecting noncontractible paths on $T^2$. The holonomy parameters are
related to the moduli on sl... | 1993-11-05 | 2010-04-28 | [
"gr-qc",
"hep-th"
] | S.Carlip and J.E.Nelson |
gr-qc/9311008 | The Black Holes of a General Two-Dimensional Dilaton Gravity Theory | A general dilaton gravity theory in 1+1 spacetime dimensions with a
cosmological constant $\lambda$ and a new dimensionless parameter $\omega$,
contains as special cases the constant curvature theory of Teitelboim and
Jackiw, the theory equivalent to vacuum planar General Relativity, the first
order string theory, and ... | 1993-11-05 | 2014-11-17 | [
"gr-qc"
] | Jos\'e P. S. Lemos and Paulo M. S\'a |
gr-qc/9311009 | 2+1 Gravity and Closed Time-Like Curves | In this paper we report some results obtained by applying the radial gauge to
2+1 dimensional gravity. The general features of this gauge are reviewed and it
is shown how they allow the general solution of the problem in terms of simple
quadratures. Then we concentrate on the general stationary problem providing
the ex... | 1993-11-05 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | P. Menotti and D. Seminara |
gr-qc/9311006 | On Einstein's equations for spacetimes admitting a non-null Killing
field | We consider the 3-dimensional formulation of Einstein's theory for spacetimes
possessing a non-null Killing field $\xi^a$. It is known that for the vacuum
case some of the basic field equations are deducible from the others. It will
be shown here how this result can be generalized for the case of essentially
arbitrary ... | 1993-11-04 | 2016-08-31 | [
"gr-qc"
] | Istvan Racz |
gr-qc/9311005 | On kinematical constraints in Regge calculus | In the (3+1)D Hamiltonian Regge calculus (one of the coordinates, $ t$, is
continuous) conjugate variables are (defined on triangles of discrete 3D
section $ t=const$) finite connections and antisymmetric area bivectors. The
latter, however, are not independent, since triangles may have common edges.
This circumstance ... | 1993-11-04 | 2010-04-06 | [
"gr-qc"
] | V.Khatsymovsky |
gr-qc/9311004 | The Hartle-Hawking state for the Bianchi IX model in supergravity | We solve the quantum constraints for homogeneous N=1 supergravity on
3-geometries with a Bianchi IX metric. Because these geometries admit Killing
vectors with the same commutation relations as the angular momentum generators,
there are two distinct definitions of homogeneity. The first of these is
well-known and has b... | 1993-11-04 | 2010-01-06 | [
"gr-qc"
] | R. Graham and H. Luckock |
gr-qc/9311003 | Local Determination of the Light Deflection in the Sperically Symmetric
Static Gravitational Field | The new method of invariant definition of the measurable angle of light
deflection in the static central symmetric gravitational field is suggested.
The predicted pure gravitational contribution to the deflection angle slightly
differs from its classical estimate and one may hope that this discrepancy
could be experime... | 1993-11-02 | 2007-05-23 | [
"gr-qc"
] | S.Tertychniy |
gr-qc/9311002 | Graviton Mode Function in Inflationary Cosmology | We consider the production of gravitons in an inflationary cosmology by
approximating each epoch of change in the equation of state as sudden, from
which a simple analytic graviton mode function has been derived. We use this
mode function to compute the graviton spectral energy density and the
tensor-induced cosmic mic... | 1993-11-02 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | Kin-Wang Ng |
gr-qc/9311001 | On quantization of Regge links | In quantum Regge calculus areas of timelike triangles possess discrete
spectrum. This is because bivectors of these triangles are variables
canonically conjugate to orthogonal connection matrices varying in the compact
group. (The scale of quantum of this spectrum is nothing but Plankian one).
This is checked in simple... | 1993-11-01 | 2009-10-22 | [
"gr-qc"
] | V.Khatsymovsky |
gr-qc/9310040 | How to construct quantum measure in Regge calculus? | We propose the following way of constructing quantum measure in Regge
calculus: the full discrete Regge manifold is made continuous in some direction
by tending corresponding dimensions of simplices to zero, then functional
integral measure corresponding to the canonical quantization (with continuous
coordinate playing... | 1993-10-29 | 2010-04-06 | [
"gr-qc"
] | V.Khatsymovsky |
gr-qc/9310041 | The Two-Dimensional Analogue of General Relativity | General Relativity in three or more dimensions can be obtained by taking the
limit $\omega\rightarrow\infty$ in the Brans-Dicke theory. In two dimensions
General Relativity is an unacceptable theory. We show that the two-dimensional
closest analogue of General Relativity is a theory that also arises in the
limit $\omeg... | 1993-10-29 | 2010-04-06 | [
"gr-qc"
] | Jos\'e P. S. Lemos and Paulo M. S\'a |
gr-qc/9310039 | Generalized boundary conditions for general relativity for the
asymptotically flat case in terms of Ashtekar's variables | There is a gap that has been left open since the formulation of general
relativity in terms of Ashtekar's new variables namely the treatment of
asymptotically flat field configurations that are general enough to be able to
define the generators of the Lorentz subgroup of the asymptotical Poincar\'e
group. While such a ... | 1993-10-29 | 2007-05-23 | [
"gr-qc"
] | T. Thiemann |
gr-qc/9310038 | Quantum Limits for Measurements on Macroscopic Bodies : A Decoherence
Analysis | We consider in this paper the quantum limits for measurements on macroscopic
bodies which are obtained in a novel way employing the concept of decoherence
coming from an analysis of the quantum mechanics of dissipative systems. Two
cases are analysed, the free mass and the harmonic oscillator, and for both
systems we c... | 1993-10-27 | 2009-10-22 | [
"gr-qc",
"cond-mat",
"hep-th"
] | Carlos O. Escobar, Lea Ferreira dos Santos, and Paulo C. Marques |
gr-qc/9310036 | A Step Toward Pregeometry I.: Ponzano-Regge Spin Networks and the Origin
of Spacetime Structure in Four Dimensions | In this paper, a candidate for pregeometry, Ponzano-Regge spin networks, will
be examined in the context of the pregeometric philosophy of Wheeler. Ponzano
and Regge were able to construct a theory for 3-dimensional quantum gravity
based on 3nj-symbols, obtaining the path integral over the metric in the
semiclassical l... | 1993-10-26 | 2009-09-25 | [
"gr-qc",
"hep-lat",
"hep-th"
] | Norman J. LaFave |
gr-qc/9310037 | 2-D Gravity as Gauge Theories with Extended Groups | The interaction of matter with gravity in two dimensional spacetimes can be
supplemented with a geometrical force analogous to a Lorentz force produced on
a surface by a constant perpendicular magnetic field. In the special case of
constant curvature, the relevant symmetry does not lead to the de Sitter or the
Poincar\... | 1993-10-26 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Daniel Cangemi |
gr-qc/9310033 | Comments on Dragging Effects | This is a reply, given at the conference ``Mach's Principle" in T\"ubingen in
July 1993, to the paper by Pfister (1993). Unfortunately the Pfister paper
itself was not sent to gr-qc. | 1993-10-25 | 2009-09-25 | [
"gr-qc"
] | Dieter R. Brill |
gr-qc/9310034 | Comments on Initial Value Formulation | This is the reply given at the conference ``Mach's Principle" at T\"ubingen
in July 1993 to the paper by Isenberg (1993a). Unfortunately the Isenberg paper
itself was not submitted to gr-qc. | 1993-10-25 | 2007-05-23 | [
"gr-qc"
] | Dieter R. Brill |
gr-qc/9310032 | Apparent wave function collapse caused by scattering | Some experimental implications of the recent progress on wave function
collapse are calculated. Exact results are derived for the center-of-mass wave
function collapse caused by random scatterings and applied to a range of
specific examples. The results show that recently proposed experiments to
measure the GRW effect ... | 1993-10-25 | 2009-10-22 | [
"gr-qc"
] | Max Tegmark |
gr-qc/9310035 | Vassiliev Invariants and the Loop States in Quantum Gravity | An exposition of Vassiliev invariants is given in terms of the simplest
approach to the functional integral construction of link invariants from
Chern-Simons theory. This approach gives the top row evaluations of Vassiliev
invariants for the classical Lie algebras, and a neat point of view on the
results of Bar-Natan. ... | 1993-10-25 | 2007-05-23 | [
"gr-qc"
] | Louis H. Kauffman |
gr-qc/9310031 | Prima Facie Questions in Quantum Gravity | The long history of the study of quantum gravity has thrown up a complex web
of ideas and approaches. The aim of this article is to unravel this web a
little by analysing some of the {\em prima facie\/} questions that can be asked
of almost any approach to quantum gravity and whose answers assist in
classifying the dif... | 1993-10-22 | 2009-10-22 | [
"gr-qc"
] | C.J.Isham |
gr-qc/9310030 | Can wormholes exist? | Renormalized vacuum expectation values of electromagnetic stress-energy
tensor are calculated in the background spherically-symmetrical metric of the
wormhole's topology. Covariant geodesic point separation method of
regularization is used. Violation of the weak energy condition at the throat of
wormhole takes place fo... | 1993-10-21 | 2009-10-22 | [
"gr-qc"
] | V.Khatsymovsky |
gr-qc/9310029 | Ramsey fringes in atomic interferometry: measurability of the influence
of space-time curvature | The influence od space-time curvature on quantum matter which can be
theoretically described by covariant wave equations has not been experimentally
established yet. In this paper we analyse in detail the suitability of the
Ramsey atom beam interferometer for the measurement of the phase shift caused
by the Riemannian ... | 1993-10-21 | 2009-10-22 | [
"gr-qc"
] | J\"urgen Audretsch and Karl-Peter Marzlin |
gr-qc/9310028 | Inhomogenous Chaotic Inflation | A chaotic model of the early universe within the framework of the
singularity-free solutions of Einstein's equation is suggested. The evolution
of our universe at its early stage, starting out as a small domain of the
parent universe, is governed by the dynamics of a classical scalar field $\phi$
. If in any such domai... | 1993-10-20 | 2007-05-23 | [
"gr-qc"
] | S.Mukherjee and N.K.Dadhich |
gr-qc/9310027 | Path Integrals, Density Matrices, and Information Flow with Closed
Timelike Curves | Two formulations of quantum mechanics, inequivalent in the presence of closed
timelike curves, are studied in the context of a soluable system. It
illustrates how quantum field nonlinearities lead to a breakdown of unitarity,
causality, and superposition using a path integral. Deutsch's density matrix
approach is causa... | 1993-10-19 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | H. David Politzer |
gr-qc/9310025 | The Gauss Linking Number in Quantum Gravity | We show that the exponential of the Gauss (self) linking number of a knot is
a solution of the Wheeler-DeWitt equation in loop space with a cosmological
constant. Using this fact, it is straightforward to prove that the second
coefficient of the Jones Polynomial is a solution of the Wheeler-DeWitt
equation in loop spac... | 1993-10-19 | 2007-05-23 | [
"gr-qc"
] | R. Gambini, J. Pullin |
gr-qc/9310026 | Dimensional Reduction in Quantum Gravity | The requirement that physical phenomena associated with gravitational
collapse should be duly reconciled with the postulates of quantum mechanics
implies that at a Planckian scale our world is not 3+1 dimensional. Rather, the
observable degrees of freedom can best be described as if they were Boolean
variables defined ... | 1993-10-19 | 2009-03-21 | [
"gr-qc"
] | G. 't Hooft |
gr-qc/9310024 | Leading Quantum Correction to the Newtonian Potential | I argue that the leading quantum corrections, in powers of the energy or
inverse powers of the distance, may be computed in quantum gravity through
knowledge of only the low energy structure of the theory. As an example, I
calculate the leading quantum corrections to the Newtonian gravitational
potential. | 1993-10-18 | 2009-10-22 | [
"gr-qc",
"hep-ph"
] | John F. Donoghue |
gr-qc/9310022 | Cosmology, Time's Arrow, and That Old Double Standard | It is widely accepted that temporal asymmetry is largely a cosmological
problem; the task of explaining temporal asymmetry reduces in the main to that
of explaining an aspect of the condition of the early universe. However,
cosmologists who discuss these issues often make mistakes similar to those that
plagued nineteen... | 1993-10-15 | 2009-09-25 | [
"gr-qc"
] | Huw Price |
gr-qc/9310023 | Entropy Production from Vacuum Decay | Using as dynamical variable the square of the radius of the Universe, we
solve analytically the Einstein equations in the framework of Robertson-Walker
models where a cosmological constant describing phenomenologically the vacuum
energy decays into radiation. Emphasis is put on the computation of the entropy
creation. | 1993-10-15 | 2009-10-22 | [
"gr-qc"
] | R. Brout and Ph. Spindel |
gr-qc/9310021 | Charged Black Holes In Quadratic Theories | We point out that in general the Reissner-Nordstr\"om (RN) charged black
holes of general relativity are not solutions of the four dimensional quadratic
gravitational theories. They are, e.g., exact solutions of the $R+R^2$
quadratic theory but not of a theory where a $R_{ab}R^{ab}$ term is present in
the gravitational... | 1993-10-14 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | A.Economou and C.O.Lousto |
gr-qc/9310019 | The Frenet Serret Description of Gyroscopic Precession | The phenomenon of gyroscopic precession is studied within the framework of
Frenet-Serret formalism adapted to quasi-Killing trajectories. Its relation to
the congruence vorticity is highlighted with particular reference to the
irrotational congruence admitted by the stationary, axisymmetric spacetime.
General precessio... | 1993-10-12 | 2008-11-26 | [
"gr-qc"
] | B.R.Iyer and C.V.Vishveshwara |
gr-qc/9310020 | Solving the Hamilton-Jacobi Equation for General Relativity | We demonstrate a systematic method for solving the Hamilton-Jacobi equation
for general relativity with the inclusion of matter fields. The generating
functional is expanded in a series of spatial gradients. Each term is
manifestly invariant under reparameterizations of the spatial coordinates
(``gauge-invariant''). At... | 1993-10-12 | 2010-11-01 | [
"gr-qc"
] | J. Parry D. S. Salopek and J. M. Stewart |
gr-qc/9310018 | Space-time events and relativistic particle localization | A relation expressing the covariant transformation properties of a
relativistic position operator is derived. This relation differs from the one
existing in the literature expressing manifest covariance by some factor
ordering. The relation is derived in order for the localization of a particle
to represent a space-tim... | 1993-10-11 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | J. Mourad |
gr-qc/9310015 | Stability of Non-Abelian Black Holes | Two types of self-gravitating particle solutions found in several theories
with non-Abelian fields are smoothly connected by a family of non-trivial black
holes. There exists a maximum point of the black hole entropy, where the
stability of solutions changes. This criterion is universal, and the changes in
stability fo... | 1993-10-08 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | K.Maeda, T.Tachizawa, T.Torii and T.Maki |
gr-qc/9310016 | Semi-Classical Limits of Simplicial Quantum Gravity | We consider the simplicial state-sum model of Ponzano and Regge as a path
integral for quantum gravity in three dimensions.
We examine the Lorentzian geometry of a single 3-simplex and of a simplicial
manifold, and interpret an asymptotic formula for $6j$-symbols in terms of this
geometry. This extends Ponzano and Re... | 1993-10-08 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | J.W. Barrett and T.J. Foxon |
gr-qc/9310017 | Stationary Axisymmetric Fields as Two-Dimensional Geodesics | Einstein's equations for stationary axisymmetric fields are reformulated as
the equations for affine geodesics in a two--dimensional space. The affine
collineations of this space are investigated and used to relate explicit
solutions of Einstein's equations with different physical properties.
Particularly, the solution... | 1993-10-08 | 2007-05-23 | [
"gr-qc"
] | D. Nunez, and H. Quevedo |
gr-qc/9310012 | Canonical Quantization of Spherically Symmetric Gravity in Ashtekar's
Self-Dual Representation | We show that the quantization of spherically symmetric pure gravity can be
carried out completely in the framework of Ashtekar's self-dual representation.
Consistent operator orderings can be given for the constraint functionals
yielding two kinds of solutions for the constraint equations, corresponding
classically to ... | 1993-10-07 | 2009-07-09 | [
"gr-qc"
] | T. Thiemann, H.A. Kastrup |
gr-qc/9310014 | The Constraints of 2+1 Quantum Gravity | To appear in proceedings of II Workshop on ``Constraints Theory and
Quantisation Methods''Montepulciano (Siena) 1993}
General discussion of the constraints of 2+1 gravity, with emphasis on two
approaches, namely the second order and first order formalisms, and comparison
with the four dimensional theory wherever poss... | 1993-10-07 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | J.E.Nelson |
gr-qc/9310013 | On the solution of the initial value constraints for general relativity
coupled to matter in terms of Ashtekar's variables | The method of solution of the initial value constraints for pure canonical
gravity in terms of Ashtekar's new canonical variables due to CDJ is further
developed in the present paper. There are 2 new main results : 1) We extend the
method of CDJ to arbitrary matter-coupling again for non-degenerate metrics :
the new fe... | 1993-10-07 | 2010-04-30 | [
"gr-qc"
] | T. Thiemann |
gr-qc/9310011 | Cosmological Rotation of Quantum-Mechanical Origin and Anisotropy of the
Microwave Background | It is shown that rotational cosmological perturbations can be generated in
the early Universe, similarly to gravitational waves. The generating mechanism
is quantum-mechanical in its nature, and the created perturbations should now
be placed in squeezed vacuum quantum states. The physical conditions under
which the phe... | 1993-10-06 | 2010-11-19 | [
"gr-qc"
] | L. P. Grishchuk |
gr-qc/9310010 | Local Position Invariance and Vacuum Energy Shifts | We discuss tests of the Einstein Equivalence Principle due to energies which
are purely quantum mechanical in origin. In particular, we consider using Lamb
Shift energies to test for possible quantum violations of Local Position
Invariance. (to appear in the Proceedings of the 5th Canadian Conference on
General Relativ... | 1993-10-06 | 2008-02-03 | [
"gr-qc",
"hep-ph"
] | C. Alvarez and R.B. Mann |
gr-qc/9310009 | General Relativity as a Theory of Two Connections | We show in this paper that it is possible to formulate General Relativity in
a phase space coordinatized by two $SO(3)$ connections. We analyze first the
Husain-Kucha\v{r} model and find a two connection description for it.
Introducing a suitable scalar constraint in this phase space we get a
Hamiltonian formulation of... | 1993-10-04 | 2017-03-24 | [
"gr-qc"
] | J. Fernando Barbero |
gr-qc/9310006 | Black Hole Evaporation without Information Loss | An approach to black hole quantization is proposed wherein it is assumed that
quantum coherence is preserved. A consequence of this is that the Penrose
diagram describing gravitational collapse will show the same topological
structure as flat Minkowski space. After giving our motivations for such a
quantization procedu... | 1993-10-04 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | C.R. Stephens, G. 't Hooft and B.F. Whiting |
gr-qc/9310007 | Inverse Square Law of Gravitation in (2+1)-Dimensional Space-Time as a
Consequence of Casimir Energy | The gravitational effect of vacuum polarization in space exterior to a
particle in (2+1)-dimensional Einstein theory is investigated. In the weak
field limit this gravitational field corresponds to an inverse square law of
gravitational attraction, even though the gravitational mass of the quantum
vacuum is negative. T... | 1993-10-04 | 2010-11-01 | [
"gr-qc"
] | H. H. Soleng |
gr-qc/9310008 | Scalar field quantization on the 2+1 dimensional black hole background | The quantization of a massless conformally coupled scalar field on the 2+1
dimensional Anti de Sitter black hole background is presented. The Green's
function is calculated, using the fact that the black hole is Anti de Sitter
space with points identified, and taking into account the fact that the black
hole spacetime ... | 1993-10-04 | 2009-09-25 | [
"gr-qc",
"hep-th"
] | G. Lifschytz and M. Ortiz |
gr-qc/9310004 | Regge calculus in the canonical form | (3+1) (continuous time) Regge calculus is reduced to Hamiltonian form. The
constraints are classified, classical and quantum consequences are discussed.
As basic variables connection matrices and antisymmetric area tensors are used
supplemented with appropriate bilinear constraints. In these variables the
action can be... | 1993-10-03 | 2015-06-25 | [
"gr-qc"
] | V. Khatsymovsky |
gr-qc/9310003 | Self-dual gravity as a two dimensional theory and conservation laws | Starting from the Ashtekar Hamiltonian variables for general relativity, the
self-dual Einstein equations (SDE) may be rewritten as evolution equations for
three divergence free vector fields given on a three dimensional surface with a
fixed volume element.
From this general form of the SDE, it is shown how they may ... | 1993-10-03 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | Viqar Husain |
gr-qc/9310005 | On polinomial formulations of general relativity | As basic variables in general relativity (GR) are chosen antisymmetric
connection and bivectors - bilinear in tetrad area tensors subject to
appropriate (bilinear) constraints. In canonical formalism we get theory with
polinomial constraints some of which are II class. On partial resolving the
latter we get another pol... | 1993-10-03 | 2007-05-23 | [
"gr-qc"
] | V. Khatsymovsky |
gr-qc/9310002 | Anti-Gravity Bounds and the Ricci Tensor | Recently Penrose, Sorkin and Woolgar have developed a new technique for
proving the positive mass theorem in general relativity. We extend their result
to produce a new inequality relating the mass, electric and scalar charges in
theories coupling to a dilaton in the usual way. Using a five dimensional
formalism, our r... | 1993-10-01 | 2007-05-23 | [
"gr-qc"
] | G.W. Gibbons, C.G. Wells |
gr-qc/9310001 | On a Quantum Universe Filled with Yang - Mills Radiation | We investigate the properties of a quantum Robertson - Walker universe
described by the Wheeler -- DeWitt equation. The universe is filled with a
quantum Yang -- Mills uniform field. This is then a quantum mini copy of the
standard model of our universe. We discuss the interpretation of the Wheeler --
DeWitt wave funct... | 1993-10-01 | 2011-08-17 | [
"gr-qc"
] | Marco Cavaglia' and Vittorio de Alfaro |
gr-qc/9309027 | Einstein-Cartan theory of gravity revisited | The role of space-time torsion in general relativity is reviewed in
accordance with some recent results on the subject. It is shown that, according
to the connection compatibility condition, the usual Riemannian volume element
is not appropriate in the presence of torsion. A new volume element is proposed
and used in t... | 1993-09-28 | 2007-05-23 | [
"gr-qc"
] | Alberto Saa |
gr-qc/9309026 | Black Hole Entropy and the Dimensional Continuation of the Gauss-Bonnet
Theorem | The Euclidean black hole has topology $\Re^2 \times {\cal S}^{d-2}$. It is
shown that -in Einstein's theory- the deficit angle of a cusp at any point in
$\Re^2$ and the area of the ${\cal S}^{d-2}$ are canonical conjugates. The
black hole entropy emerges as the Euler class of a small disk centered at the
horizon multip... | 1993-09-25 | 2009-01-23 | [
"gr-qc"
] | M\'aximo Ba\~nados, Claudio Teitelboim and Jorge Zanelli |
gr-qc/9309025 | Green's function for gravitational waves in FRW spacetimes | A method for calculating the retarded Green's function for the gravitational
wave equation in Friedmann-Roberson-Walker spacetimes, within the formalism of
linearized Einstein gravity is developed. Hadamard's general solution to
Cauchy's problem for second-order, linear partial differential equations is
applied to the ... | 1993-09-24 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | R. R. Caldwell |
gr-qc/9309024 | Reality Conditions in Nonperturbative Quantum Cosmology | We carry out the nonperturbative canonical quantization of several types of
cosmological models that have already been studied in the geometrodynamic
formulation using the complex path-integral approach. We establish a relation
between the choices of complex contours in the path integral and the sets of
reality conditi... | 1993-09-23 | 2010-04-06 | [
"gr-qc"
] | Guillermo A. Mena Marugan |
gr-qc/9309022 | Nonlinear Evolution of Density Perturbations | : From the epoch of recombination $(z\approx 10^3)$ till today, the typical
density contrasts have grown by a factor of about $10^6$ in a Friedmann
universe with $\Omega=1$. However, during the same epoch the typical
gravitational potential has grown only by a factor of order unity. We present
theoretical arguments exp... | 1993-09-23 | 2009-09-25 | [
"gr-qc",
"astro-ph"
] | J.S.Bagla and T.Padmanabhan |
gr-qc/9309023 | Non-Singular Constant Curvature Two-Dimensional Black Hole | We show that the two-dimensional theory of Teitelboim and Jackiw has a black
hole solution, with two surprising properties: first, it has constant
curvature, and second, is free of spacetime singularities. The maximally
extended spacetime consists of an infinite chain of universes connected by
timelike wormholes. | 1993-09-23 | 2009-10-22 | [
"gr-qc"
] | Jos\'e P. S. Lemos and Paulo M. S\'a |
gr-qc/9309021 | Early Direct Detection of Gravity Waves | Recently, the possibility has emerged of an early detection of astrophysical
gravity waves. In certain astronomical configurations, and through a new
light-deflection effect, gravity waves can cause apparent shifts in stellar
angular positions as large as $10^{-7}arcsec$. In these same configurations,
the magnitude of ... | 1993-09-21 | 2007-05-23 | [
"gr-qc",
"astro-ph"
] | Redouane Fakir |
gr-qc/9309020 | Geometric Structures and Loop Variables in (2+1)-Dimensional Gravity | This paper is a review of the relationship between the metric formulation of
(2+1)-dimensional gravity and the loop observables of Rovelli and Smolin. I
emphasize the possibility of reconstructing the geometry, via the theory of
geometric structures, from the values of the loop variables. I close with a
brief discussio... | 1993-09-21 | 2007-05-23 | [
"gr-qc"
] | S. Carlip |
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