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/9211004 | Sum-over-histories origin of the composition laws of relativistic
quantum mechanics and quantum cosmology | The scope of the paper has been broadened to include a more complete
discussion of the following topics: The derivation of composition laws in
quantum cosmology. The connection between the existence of a composition law in
the sum over histories approach to relativistic quantum mechanics and quantum
cosmology, and the ... | 1992-11-04 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Jonathan Halliwell and Miguel Ortiz |
gr-qc/9211005 | M\"o\ss{}bauer null redshift experiment II | Accurate limits for the violation of the Principle of Equivalence have been
found from the comparison of the redshifts of two identical nuclear species in
different chemical environments. | 1992-11-04 | 2007-05-23 | [
"gr-qc"
] | M. De Francia, G. Goya, R. C. Mercader and H. Vucetich |
gr-qc/9211007 | D=3: Singularities in Gravitational Scattering of Scalar Waves | Family of exact spacetimes of D=3 Einstein gravity interacting with massless
scalar field is obtained by suitable dimensional reduction of a class of D=4
plane-symmetric Einstein vacua. These D=3 spacetimes describe collisions of
line-fronted asymptotically null excitations and are generically singular to
the future. T... | 1992-11-04 | 2016-08-14 | [
"gr-qc"
] | C. Klim\v{c}\'ik and P. Koln\'ik |
gr-qc/9211003 | Hadamard States and Adiabatic Vacua | Reversing a slight detrimental effect of the mailer related to TeXability | 1992-11-04 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Kay-Thomas Pirk |
gr-qc/9211001 | Chern--Simons Gravity from 3+1 Dimensional Gravity | In the context of a Poincar\'e gauge theoretical formulation, pure gravity in
3+1-dimensions is dimensionally reduced to gravity in 2+1-dimensions with or
without cosmological constant $\Lambda$. The dimensional reductions are
consistent with the gauge symmetries, mapping ISO(3, 1) gauge transformations
into ISO(2,1) o... | 1992-11-03 | 2009-10-22 | [
"gr-qc"
] | G. Grignani and G. Nardelli |
gr-qc/9211002 | Einstein Equation with Quantum Corrections Reduced to Second Order | We consider the Einstein equation with first order (semiclassical) quantum
corrections. Although the quantum corrections contain up to fourth order
derivatives of the metric, the solutions which are physically relevant satisfy
a reduced equations which contain derivatives no higher than second order. We
obtain the redu... | 1992-11-03 | 2008-11-26 | [
"gr-qc"
] | Leonard Parker and Jonathan Z. Simon |
gr-qc/9210020 | SO(4) Invariant States in Quantum Cosmology | The phenomenon of linearisation instability is identified in models of
quantum cosmology that are perturbations of mini-superspace models. In
particular, constraints that are second order in the perturbations must be
imposed on wave functions calculated in such models. It is shown explicitly
that in the case of a model... | 1992-10-30 | 2010-04-06 | [
"gr-qc"
] | Fay Dowker |
gr-qc/9210017 | Is Quantum Spacetime Foam Unstable? | A very simple wormhole geometry is considered as a model of a mode of
topological fluctutation in Planck-scale spacetime foam. Quantum dynamics of
the hole reduces to quantum mechanics of one variable, throat radius, and
admits a WKB analysis. The hole is quantum-mechanically unstable: It has no
bound states. Wormhole ... | 1992-10-28 | 2010-01-06 | [
"gr-qc"
] | Ian H. Redmount and Wai-Mo Suen |
gr-qc/9210018 | Self-Consistence of Semi-Classical Gravity | Simon argued that the semi-classical theory of gravity, unless with some of
its solutions excluded, is unacceptable for reasons of both self-consistency
and experiment, and that it has to be replaced by a constrained semi-classical
theory. We examined whether the evidence is conclusive. | 1992-10-28 | 2007-05-23 | [
"gr-qc"
] | Wai-Mo Suen |
gr-qc/9210016 | Towards a Singularity-Proof Scheme in Numerical Relativity | Progress in numerical relativity has been hindered for 30 years because of
the difficulties of avoiding spacetime singularities in numerical evolution. We
propose a scheme which excises a region inside an apparent horizon containing
the singularity. Two major ingredients of the scheme are the use of a
horizon-locking c... | 1992-10-28 | 2008-11-26 | [
"gr-qc"
] | Edward Seidel and Wai-Mo Suen |
gr-qc/9210019 | Path integration in relativistic quantum mechanics | The simple physics of a free particle reveals important features of the
path-integral formulation of relativistic quantum theories. The exact
quantum-mechanical propagator is calculated here for a particle described by
the simple relativistic action proportional to its proper time. This propagator
is nonvanishing outsi... | 1992-10-28 | 2015-06-25 | [
"gr-qc"
] | Ian H. Redmount and Wai-Mo Suen |
gr-qc/9210015 | Cosmological Models in Two Spacetime Dimensions | Various physical properties of cosmological models in (1+1) dimensions are
investigated. We demonstrate how a hot big bang and a hot big crunch can arise
in some models. In particular, we examine why particle horizons do not occur in
matter and radiation models. We also discuss under what circumstances
exponential infl... | 1992-10-26 | 2010-04-06 | [
"gr-qc"
] | K.C.K. Chan and R.B. Mann |
gr-qc/9210014 | A Nonsingular Universe | We construct an effective action for gravity in which all homogeneous
solutions are nonsingular. In particular, there is neither a big bang nor a big
crunch. The action is a higher derivative modification of Einstein's theory
constructed in analogy to how the action for point particle motion in special
relativity is ob... | 1992-10-24 | 2007-05-23 | [
"gr-qc",
"astro-ph",
"hep-th"
] | Robert H. Brandenberger |
gr-qc/9210013 | Quantum Effects in Black Hole Interiors | The Weyl curvature inside a black hole formed in a generic collapse grows,
classically without bound, near to the inner horizon, due to partial absorption
and blueshifting of the radiative tail of the collapse. Using a spherical
model, we examine how this growth is modified by quantum effects of conformally
coupled mas... | 1992-10-23 | 2009-10-22 | [
"gr-qc"
] | Warren G. Anderson, Patrick R. Brady, Werner Israel, and Sharon M.
Morsink |
gr-qc/9210012 | No Time Machines from Lightlike Sources in 2+1 Gravity | We extend the argument that spacetimes generated by two timelike particles in
D=3 gravity (or equivalently by parallel-moving cosmic strings in D=4) permit
closed timelike curves (CTC) only at the price of Misner identifications that
correspond to unphysical boundary conditions at spatial infinity and to a
tachyonic ce... | 1992-10-21 | 2009-11-19 | [
"gr-qc",
"hep-th"
] | S. Deser and Alan R. Steif |
gr-qc/9210010 | Classical Equations for Quantum Systems | The origin of the phenomenological deterministic laws that approximately
govern the quasiclassical domain of familiar experience is considered in the
context of the quantum mechanics of closed systems such as the universe as a
whole. We investigate the requirements for coarse grainings to yield decoherent
sets of histo... | 1992-10-21 | 2014-01-15 | [
"gr-qc",
"hep-th",
"quant-ph"
] | Murray Gell-Mann and James B. Hartle |
gr-qc/9210011 | Canonical Quantum Gravity and the Problem of Time | This is the write-up of my lectures at the NATO Summer School held in
Salamanca in June 1992. The paper deals with the problem of time in quantum
gravity. All the major schemes are reviewed. Please note that the paper is in
two parts for ease of email transmission; this is part 1. The mailer from gr-qc
may further subd... | 1992-10-21 | 2007-05-23 | [
"gr-qc"
] | Chris J. Isham |
gr-qc/9210009 | Improved Energy-Momentum Currents in Metric-Affine Spacetime | In Minkowski spacetime it is well-known that the canonical energy-momentum
current is involved in the construction of the globally conserved currents of
energy-momentum and total angular momentum. For the construction of conserved
currents corresponding to (approximate) scale and proper conformal symmetries,
however, a... | 1992-10-15 | 2008-11-26 | [
"gr-qc",
"hep-th"
] | Ralf Hecht, Friedrich W. Hehl, J. Dermott McCrea, Eckehard W. Mielke
and Yuval Ne'eman |
gr-qc/9210008 | Dynamical Origin of the Lorentzian Signature of Spacetime | It is suggested that not only the curvature, but also the signature of
spacetime is subject to quantum fluctuations. A generalized D-dimensional
spacetime metric of the form $g_{\mu \nu}=e^a_\mu \eta_{ab} e^b_\nu$ is
introduced, where $\eta_{ab} = diag\{e^{i\theta},1,...,1\}$. The corresponding
functional integral for ... | 1992-10-14 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | J. Greensite |
gr-qc/9210006 | The Quantum Mechanics of Closed Systems | A pedagogical introduction is given to the quantum mechanics of closed
systems, most generally the universe as a whole. Quantum mechanics aims at
predicting the probabilities of alternative coarse-grained time histories of a
closed system. Not every set of alternative coarse-grained histories that can
be described may ... | 1992-10-13 | 2014-01-15 | [
"gr-qc",
"hep-th",
"quant-ph"
] | James B. Hartle |
gr-qc/9210007 | Unitary Equivalence of the Metric and Holonomy Formulations of 2+1
Dimensional Quantum Gravity on the Torus | Recent work on canonical transformations in quantum mechanics is applied to
transform between the Moncrief metric formulation and the Witten-Carlip
holonomy formulation of 2+1-dimensional quantum gravity on the torus. A
non-polynomial factor ordering of the classical canonical transformation
between the metric and holo... | 1992-10-13 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Arlen Anderson |
gr-qc/9210005 | The Dark Matter Problem in Light of Quantum Gravity | We show how, by considering the cumulative effect of tiny quantum
gravitational fluctuations over very large distances, it may be possible to:
($a$) reconcile nucleosynthesis bounds on the density parameter of the Universe
with the predictions of inflationary cosmology, and ($b$) reproduce the
inferred variation of the... | 1992-10-08 | 2009-10-22 | [
"gr-qc",
"astro-ph",
"hep-ph"
] | T. Goldman, J. P\'erez-Mercader, Fred Cooper and Michael Martin Nieto |
gr-qc/9210004 | The Spacetime Approach to Quantum Mechanics | Feynman's sum-over-histories formulation of quantum mechanics is reviewed as
an independent statement of quantum theory in spacetime form. It is different
from the usual Schr\"odinger-Heisenberg formulation that utilizes states on
spacelike surfaces because it assigns probabilities to different sets of
alternatives. Su... | 1992-10-07 | 2018-07-24 | [
"gr-qc",
"hep-th",
"quant-ph"
] | James B. Hartle |
gr-qc/9210003 | The Wave Function of the Universe by the New Euclidean Path-integral
Approach in Quantum Cosmology | The wave function of the universe is evaluated by using the Euclidean path
integral approach. As is well known, the real Euclidean path integral diverges
because the Einstein-Hilbert action is not positive definite. In order to
obtain a finite wave function, we propose a new regularization method and
calculate the wave... | 1992-10-07 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Atushi Ishikawa and Haruhiko Ueda |
gr-qc/9210002 | The Nordtvedt effect in the Trojan asteroids | Bounds to the Nordtvedt parameter are obtained from the motion of the first
twelve Trojan asteroids in the period 1906-1990. From the analysis performed,
we derive a value for the inverse of the Saturn mass 3497.80 \pm 0.81 and the
Nordtvedt parameter -0.56 \pm 0.48, from a simultaneous solution for all
asteroids. | 1992-10-05 | 2011-05-23 | [
"gr-qc"
] | R.B. Orellana and H. Vucetich |
gr-qc/9210001 | Clifford Algebra of Two-Forms, Conformal Structures and Field Equations | I review the equivalence between duality operators on two-forms and conformal
structures in four dimensions, from a Clifford algebra point of view (due to
Urbantke and Harnett). I also review an application, which leads to a set of
"neighbours" of Einstein's equations. An attempt to formulate reality
conditions for the... | 1992-10-05 | 2007-05-23 | [
"gr-qc"
] | Ingemar Bengtsson |
gr-qc/9209014 | The Microcanonical Functional Integral. I. The Gravitational Field | The gravitational field in a spatially finite region is described as a
microcanonical system. The density of states $\nu$ is expressed formally as a
functional integral over Lorentzian metrics and is a functional of the
geometrical boundary data that are fixed in the corresponding action. These
boundary data are the th... | 1992-09-30 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | J. David Brown and James W. York |
gr-qc/9209013 | Poincar\'e Gauge Theories for Lineal Garvity | We have shown that two of the most studied models of lineal gravities -
Liouville gravity and a ``string-inspired'' model exhibiting the main
characteristic features of a black-hole solution - can be formulated as gauge
invariant theories of the Poincar\'e group. The gauge invariant couplings to
matter (particles, scal... | 1992-09-30 | 2009-10-22 | [
"gr-qc"
] | G. Grignani and G. Nardelli |
gr-qc/9209015 | Jordan-Brans-Dicke Quantum Wormholes and Coleman's Mechanism | We consider the quantum gravity and cosmology of a Jordan-Brans-Dicke theory,
predicted by string effective actions. We study its canonical formalism and
find that the constraint algebra is that of general relativity, as a
consequence of the general covariance of scalar-tensor theories. We also
analyze the problem of b... | 1992-09-30 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Luis J. Garay and Juan Garcia-Bellido |
gr-qc/9209012 | Quasilocal Energy and Conserved Charges Derived from the Gravitational
Action | The quasilocal energy of gravitational and matter fields in a spatially
bounded region is obtained by employing a Hamilton-Jacobi analysis of the
action functional. First, a surface stress-energy-momentum tensor is defined by
the functional derivative of the action with respect to the three-metric on
${}^3B$, the histo... | 1992-09-29 | 2008-11-26 | [
"gr-qc",
"hep-th"
] | J. David Brown and James W. York |
gr-qc/9209011 | The Modular Group, Operator Ordering, and Time in (2+1)-Dimensional
Gravity | A choice of time-slicing in classical general relativity permits the
construction of time-dependent wave functions in the ``frozen time''
Chern-Simons formulation of $(2+1)$-dimensional quantum gravity. Because of
operator ordering ambiguities, however, these wave functions are not unique. It
is shown that when space h... | 1992-09-25 | 2010-04-28 | [
"gr-qc",
"hep-th"
] | S. Carlip |
gr-qc/9209009 | Euclidean Maxwell-Einstein Theory | After reviewing the context in which Euclidean propagation is useful we
compare and contrast Euclidean and Lorentzian Maxwell-Einstein theory and give
some examples of Euclidean solutions. | 1992-09-24 | 2007-05-23 | [
"gr-qc"
] | Dieter Brill |
gr-qc/9209010 | Detection, Measurement and Gravitational Radiation | Here I examine how to determine the sensitivity of the LIGO, VIRGO, and LAGOS
gravitational wave detectors to sources of gravitational radiation by
considering the process by which data are analyzed in a noisy detector. By
constructing the probability that the detector output is consistent with the
presence of a signal... | 1992-09-24 | 2008-11-26 | [
"gr-qc",
"astro-ph"
] | Lee Samuel Finn |
gr-qc/9209008 | Continuous Family of Einstein-Yang-Mills Wormholes | It is shown that for some particular value of the cosmological constant
depending on the gauge coupling constant a continuous one-parameter family of
Einstein-Yang-Mills wormholes exists which interpolates between the instanton
and the gravitating meron solutions. In contradistinction with the previously
known solution... | 1992-09-23 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | E.E. Donets and D.V. Gal'tsov |
gr-qc/9209007 | Semiclassical Effects and the Onset of Inflation | We present a class of exact solutions to the constraint equations of General
Relativity coupled to a Klein - Gordon field, these solutions being isotropic
but not homogeneous. We analyze the subsequent evolution of the consistent
Cauchy data represented by those solutions, showing that only certain special
initial cond... | 1992-09-16 | 2010-11-01 | [
"gr-qc"
] | E. Calzetta and M. Sakellariadou |
gr-qc/9209006 | Asymptotic Behavior of the $T^3 \times R$ Gowdy Spacetimes | We present new evidence in support of the Penrose's strong cosmic censorship
conjecture in the class of Gowdy spacetimes with $T^3$ spatial topology.
Solving Einstein's equations perturbatively to all orders we show that
asymptotically close to the boundary of the maximal Cauchy development the
dominant term in the exp... | 1992-09-16 | 2009-10-22 | [
"gr-qc"
] | Boro Grubisic and Vincent Moncrief |
gr-qc/9209005 | The Loss of Unitarity in the Vicinity of a Time Machine | We construct the propagator of a non-relativistic non-interacting particle in
a flat spacetime in which two regions have been identified. This corresponds to
the simplest "time machine". We show that while completeness is lost in the
vicinity of the time machine it holds before the time machine appears and it is
recove... | 1992-09-14 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Dalia S. Goldwirth, Malcolm J. Perry and Tsvi Piran |
gr-qc/9209004 | A Quasilocal Test of the Finiteness of the Universe | The Cosmological Principle states that the universe is both homogeneous and
isotropic. This, alone, is not enough to specify the global geometry of the
spacetime. If we were able to measure both the Hubble constant and the energy
density we could determine whether the universe is open or closed.
Unfortunately, while so... | 1992-09-11 | 2007-05-23 | [
"gr-qc",
"astro-ph"
] | Edward Malec and Niall \'O Murchadha |
gr-qc/9209003 | Transformations and BRST-Charges in 2+1 Dimensional Gravitation | Canonical transformations relating the variables of the ADM-, Ashtekar's and
Witten's formulations of gravity are computed in 2+1~dimensions. Three
different forms of the BRST-charge are given in the 2+1 dimensional Ashtekar
formalism, two of them using Ashtekar's form of the constraints and one of them
using the forms... | 1992-09-08 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | G\'eza F\"ul\"op |
gr-qc/9209002 | Results on exact solutions of low energy string theory | A family of solutions to low energy string theory is found. These solutions
represent waves traveling along "extremal black strings" | 1992-09-05 | 2009-10-22 | [
"gr-qc"
] | David Garfinkle |
gr-qc/9209001 | Quantum Gravity, the Origin of Time and Time's Arrow | The local Lorentz and diffeomorphism symmetries of Einstein's gravitational
theory are spontaneously broken by a Higgs mechanism by invoking a phase
transition in the early Universe, at a critical temperature $T_c$ below which
the symmetry is restored. The spontaneous breakdown of the vacuum state
generates an external... | 1992-09-02 | 2014-11-17 | [
"gr-qc"
] | J. W. Moffat |
gr-qc/9208011 | Comparison of the Sachs-Wolfe Effect for Gaussian and Non-Gaussian
Fluctuations | A consequence of non-Gaussian perturbations on the Sachs-Wolfe effect is
studied. For a particular power spectrum, predicted Sachs-Wolfe effects are
calculated for two cases: Gaussian (random phase) configuration, and a specific
kind of non-Gaussian configuration. We obtain a result that the Sachs-Wolfe
effect for the ... | 1992-08-28 | 2009-12-30 | [
"gr-qc",
"astro-ph"
] | Jong H. Kung |
gr-qc/9208010 | Massive Analogue of Ashtekar-CJD Action | The action of Ashtekar gravity have been found by Cappovilla, Jacobson and
Dell. It does not depend on the metric nor the signature of the space-time. The
action has a similar structure as that of a massless relativistic particle. The
former is naturally generalized by adding a term analogous to a mass term of
the rela... | 1992-08-25 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | K.Kamimura and T.Fukuyama |
gr-qc/9208009 | The Entropy of the Gravitational Field | We derive a formula for the nonequilibrium entropy of a classical stochastic
field in terms of correlation functions of this field. The formalism is then
applied to define the entropy of gravitational perturbations (both
gravitational waves and density fluctuations). We calculate this entropy in a
specific cosmological... | 1992-08-20 | 2009-10-22 | [
"gr-qc",
"astro-ph",
"hep-th"
] | R. Brandenberger(Brown), T.Prokopec(Brown), V. Mukhanov(ETH, Zurich) |
gr-qc/9208007 | There is no $R^3 X S^1$ vacuum gravitational instanton | Gravitational instantons, solutions to the euclidean Einstein equations, with
topology $R^3 XS^1$ arise naturally in any discussion of finite temperature
quantum gravity. This Letter shows that all such instantons (irrespective of
their interior behaviour) must have the same asymptotic structure as the
Schwarzschild in... | 1992-08-19 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Niall \'O Murchadha and Hugh Shanahan |
gr-qc/9208008 | Trapped surfaces and spherical closed cosmologies | This article gives necessary and sufficient conditions for the formation of
trapped surfaces in spherically symmetric initial data defined on a closed
manifold. Such trapped surfaces surround a region in which there occurs an
enhancement of matter over the average. The conditions are posed directly in
terms of physical... | 1992-08-19 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | Edward Malec and Niall \'O Murchadha |
gr-qc/9208005 | Nonlinear Noise in Cosmology | This paper derives and analyzes exact, nonlocal Langevin equations
appropriate in a cosmological setting to describe the interaction of some
collective degree of freedom with a surrounding ``environment.'' Formally,
these equations are much more general, involving as they do a more or less
arbitrary ``system,'' charact... | 1992-08-13 | 2009-10-22 | [
"gr-qc"
] | Salman Habib and Henry E. Kandrup |
gr-qc/9208006 | Stochastic Inflation:The Quantum Phase Space Approach | In this paper a quantum mechanical phase space picture is constructed for
coarse-grained free quantum fields in an inflationary Universe. The appropriate
stochastic quantum Liouville equation is derived. Explicit solutions for the
phase space quantum distribution function are found for the cases of power law
and expone... | 1992-08-13 | 2009-10-22 | [
"gr-qc"
] | Salman Habib |
gr-qc/9208004 | The $D\to 2$ Limit of General Relativity | A method for taking the $D\to 2$ limit of D-dimensional general relativity is
constructed, yielding a two-dimensional theory which couples gravitation to
conserved stress-energy. We show how this theory is related to those obtained
via an alternative dimensional reduction approach. | 1992-08-13 | 2010-04-30 | [
"gr-qc",
"hep-th"
] | R.B. Mann and S.F. Ross |
gr-qc/9208003 | Generation of seed perturbations from Quantum Cosmology | The origin of seed perturbations in the Universe is studied within the
framework of a specific minisuperspace model. It is shown that the `creation'
of the Universe as a result of a quantum transition from a flat empty spacetime
would lead to a flat FLRW (Friedmann Lema\^\i tre Robertson-Walker) Universe
with weak inho... | 1992-08-11 | 2008-11-26 | [
"gr-qc",
"astro-ph"
] | Tarun Souradeep |
gr-qc/9208002 | Thermodynamics of Two-Dimensional Black-Holes | We explore the thermodynamics of a general class of two dimensional dilatonic
black-holes. A simple prescription is given that allows us to compute the mass,
entropy and thermodynamic potentials, with results in agreement with those
obtained by other methods, when available. | 1992-08-11 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Chiara R. Nappi and Andrea Pasquinucci |
gr-qc/9208001 | The Interpretation of Quantum Cosmological Models | We consider the problem of extracting physical predictions from the wave
function of the universe in quantum cosmological models. We state the features
of quantum cosmology an interpretational scheme should confront. We discuss the
Everett interpretation, and extensions of it, and their application to quantum
cosmology... | 1992-08-05 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Jonathan J. Halliwell |
gr-qc/9207011 | Centrifugal force in Kerr geometry | We have obtained the correct expression for the centrifugal force acting on a
particle at the equatorial circumference of a rotating body in the locally
non-rotating frame of the Kerr geometry. Using this expression for the
equilibrium of an element on the surface of a slowly rotating Maclaurin
spheroid, we obtain the ... | 1992-07-31 | 2009-10-22 | [
"gr-qc"
] | Sai Iyer and A R Prasanna |
gr-qc/9207010 | The Dirac Equation Is Separable On The Dyon Black Hole Metric | Using the tetrad formalism, we carry out the separation of variables for the
massive complex Dirac equation in the gravitational and electromagnetic field
of a four-parameter (mass, angular momentum, electric and magnetic charges)
black hole. | 1992-07-28 | 2016-08-17 | [
"gr-qc"
] | \.Ibrahim Semiz (Yale U.) |
gr-qc/9207008 | The No-Hair Theorem for the Abelian Higgs Model | We consider the general procedure for proving no-hair theorems for static,
spherically symmetric black holes. We apply this method to the abelian Higgs
model and find a proof of the no-hair conjecture that circumvents the
objections raised against the original proof due to Adler and Pearson. | 1992-07-27 | 2009-10-22 | [
"gr-qc"
] | Amitabha Lahiri |
gr-qc/9207009 | Gravitational Waves from an Axi-symmetric Source in the Nonsymmetric
Grav. Theory | We examine gravitational waves in an isolated axi--symmetric reflexion
symmetric NGT system. The structure of the vacuum field equations is analyzed
and the exact solutions for the field variables in the metric tensor are found
in the form of expansions in powers of a radial coordinate. We find that in the
NGT axially ... | 1992-07-27 | 2007-05-23 | [
"gr-qc"
] | J. W. Moffat and D. C. Tatarski |
gr-qc/9207007 | Comments on Theoretical Problems in Nonsymmetric Gravitational Theory | Damour, Deser and McCarthy have claimed that the nonsymmetric gravitational
theory (NGT) is untenable due to curvature coupled ghost modes and bad
asymptotic behavior. This claim is false for it is based on a physically
inaccurate treatment of wave propagation on a curved background and an
incorrect method for extracti... | 1992-07-24 | 2009-10-22 | [
"gr-qc",
"astro-ph"
] | N. J. Cornish and J. W. Moffat |
gr-qc/9207004 | One Formulation for both Lineal Gravities through a Dimensional
Reduction | The two lineal gravities --- based on the de Sitter group or a central
extension of the Poincar\'e group in 1+1 dimensions --- are shown to derive
classically from a unique topological gauge theory. This one is obtained after
a dimensional reduction of a Chern--Simons model, which describes pure gravity
in 2+1 dimensio... | 1992-07-23 | 2016-08-31 | [
"gr-qc",
"hep-th"
] | Daniel Cangemi |
gr-qc/9207006 | The Spin Holonomy Group In General Relativity | It has recently been shown by Goldberg et al that the holonomy group of the
chiral spin-connection is preserved under time evolution in vacuum general
relativity. Here, the underlying reason for the time-independence of the
holonomy group is traced to the self-duality of the curvature 2-form for an
Einstein space. This... | 1992-07-23 | 2009-10-22 | [
"gr-qc"
] | Ted Jacobson and Joseph D. Romano |
gr-qc/9207005 | Degenerate Extensions of General Relativity | General relativity has previously been extended to incorporate degenerate
metrics using Ashtekar's hamiltonian formulation of the theory. In this letter,
we show that a natural alternative choice for the form of the hamiltonian
constraints leads to a theory which agrees with GR for non-degenerate metrics,
but differs i... | 1992-07-23 | 2010-04-06 | [
"gr-qc"
] | Ted Jacobson and Joseph D. Romano |
gr-qc/9207003 | Nonsymmetric Gravity Theories: Inconsistencies and a Cure | Motivated by the apparent dependence of string $\sigma$--models on the sum of
spacetime metric and antisymmetric tensor fields, we reconsider gravity
theories constructed from a nonsymmetric metric. We first show that all such
"geometrical" theories homogeneous in second derivatives violate standard
physical requiremen... | 1992-07-22 | 2008-11-26 | [
"gr-qc"
] | T. Damour (IHES and DARC) S. Deser (Brandeis University) J. McCarthy
(University of Adelaide) |
gr-qc/9207002 | Remarks on Pure Spin Connection Formulations of Gravity | In the derivation of a pure spin connection action functional for gravity two
methods have been proposed. The first starts from a first order lagrangian
formulation, the second from a hamiltonian formulation. In this note we show
that they lead to identical results for the specific cases of pure gravity with
or without... | 1992-07-21 | 2010-11-01 | [
"gr-qc"
] | Riccardo Capovilla and Ted Jacobson |
gr-qc/9207001 | Non-Minimally Coupled Scalar Field and Ashtekar Variables | The non-minimal coupling of a scalar field is considered in the framework of
Ashtekar's new variables formulation of gravity. A first order action
functional for this system is derived in which the field variables are a tetrad
field, and an SL(2,C) connection, together with the scalar field. The tetrad
field and the SL... | 1992-07-20 | 2010-11-01 | [
"gr-qc"
] | Riccardo Capovilla |
hep-lat/9212034 | On the Dynamics of Light Quarks in QCD | We describe recent results concerning the behavior of lattice QCD with light
dynamical Wilson and Staggered quarks. We show that it is possible to reach
regions of parameter space with light pions $m_\pi\approx 0.2/a$ using Wilson
fermions. If the Hybrid Molecular Dynamics (HMD) algorithm is used with the
same paramete... | 1992-12-24 | 2016-08-31 | [
"hep-lat"
] | Khalil Bitar, Robert G. Edwards, Urs M. Heller, and A.D. Kennedy |
hep-lat/9212035 | Calculating the Isgur-Wise Function on the Lattice | We calculate the Isgur-Wise function by measuring the heavy-heavy meson
transition matrix element on the lattice. The standard Wilson action is used
for both the heavy and light quarks. Our first numerical results are presented. | 1992-12-24 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Claude Bernard, Yue Shen and Amarjit Soni |
hep-lat/9212033 | A realistic heat bath: theory and application to kink-antikink dynamics | We propose a new method of studying a real-time canonical evolution of
field-theoretic systems with boundary coupling to a realistic heat bath. In the
free-field case the method is equivalent to an infinite extension of the system
beyond the boundary, while in the interacting case the extension of the system
is done in... | 1992-12-24 | 2010-11-01 | [
"hep-lat",
"cond-mat",
"hep-th"
] | A. Krasnitz and R. Potting |
hep-lat/9212032 | Series studies of the Potts model. I: The simple cubic Ising model | The finite lattice method of series expansion is generalised to the $q$-state
Potts model on the simple cubic lattice.
It is found that the computational effort grows exponentially with the square
of the number of series terms obtained, unlike two-dimensional lattices where
the computational requirements grow exponen... | 1992-12-24 | 2011-07-19 | [
"hep-lat"
] | A J Guttmann and I G Enting |
hep-lat/9212031 | Hadron Mass Predictions of the Valence Approximation to Lattice QCD | We evaluate the infinite volume, continuum limits of eight hadron mass ratios
predicted by lattice QCD with Wilson quarks in the valence (quenched)
approximation. Each predicted ratio differs from the corresponding observed
value by less than 6\%. | 1992-12-22 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | F. Butler, H. Chen, J. Sexton, A. Vaccarino, and D. Weingarten |
hep-lat/9212029 | Strongly Interacting Higgs Sector in the Minimal Standard Model? | The triviality Higgs mass bound is studied {\it without} lattice regulator in
the spontaneously broken phase of the four dimensional O(4) symmetric scalar
field theory with quartic self-interaction. A higher derivative term is
introduced in the kinetic energy of the Lagrangian to keep quantum fluctuations
finite while ... | 1992-12-21 | 2007-05-23 | [
"hep-lat"
] | Karl Jansen, Julius Kuti and Chuan Liu |
hep-lat/9212028 | Large scale numerical simulation of the three-state Potts model | The three-state Potts model is numerically investigated on three-dimensional
simple cubic lattices of up to \(128^3\) volume, concentrating on the
neighborhood of the first-order phase transition separating the ordered and
disordered phases. The ordered phase is found to allow admixture of disordered
domains induced by... | 1992-12-21 | 2009-10-22 | [
"hep-lat"
] | Shigemi Ohta |
hep-lat/9212030 | Chiral Fermions, Anomalies and Chern-Simons Currents on the Lattice | I discuss the zeromode spectrum of lattice chiral fermions in the domain wall
model suggested recently. In particular I give the critical momenta where the
fermions cease to be chiral and show that the spectrum is directly related to
the behaviour of the Chern-Simons current on the lattice. First results for the
domain... | 1992-12-21 | 2009-10-22 | [
"hep-lat"
] | Karl Jansen |
hep-lat/9212027 | The Spectrum of the Kazakov Migdal-Model | Gross has found an exact expression for the density of eigenvalues in the
simplest version of the Kazakov-Migdal model of induced QCD. In this paper we
compute the spectrum of small fluctuations around Gross's semi-circular
solution. By solving Migdal's wave equation we find a string-like spectrum
which, in four dimens... | 1992-12-20 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | S. Aoki and A. Gocksch |
hep-lat/9212024 | How much are 2d Yukawa models similar to the Gross-Neveu models? | We present numerical evidence that the 2d Yukawa models with strong quartic
selfcoupling of the scalar field have the same phase structure and are
asymptotically free in the Yukawa coupling like the Gross-Neveu models. | 1992-12-18 | 2009-10-22 | [
"hep-lat"
] | A.K. De, E. Focht, W. Franzki and J. Jersak |
hep-lat/9212022 | Finite size and temperature effects in the AF Heisenberg model | The low temperature and large volume effects in the d=2+1 antiferromagnetic
quantum Heisenberg model are dominated by magnon excitations. The leading and
next-to-leading corrections are fully controlled by three physical constants,
the spin stiffness, the spin wave velocity and the staggered magnetization.
Among others... | 1992-12-18 | 2009-10-22 | [
"hep-lat",
"cond-mat"
] | P. Hasenfratz and F. Niedermayer (Bern) |
hep-lat/9212023 | Cosmic Strings on the Lattice | We develop a formalism for the quantization of topologically stable
excitations in the 4-dimensional abelian lattice gauge theory. The excitations
are global and local (Abrikosov-Nielsen-Olesen) strings and monopoles. The
operators of creation and annihilation of string states are constructed; the
string Green function... | 1992-12-18 | 2009-10-22 | [
"hep-lat"
] | A.K. Bukenov, A.V. Pochinsky, M.I. Polikarpov, L. Polley and U.-J.
Wiese |
hep-lat/9212026 | Can the Couplings in the Fermion-Higgs Sector of the Standard Model be
Strong? | We present results for the renormalized quartic self-coupling $\lambda_R$ and
the Yukawa coupling $y_R$ in a lattice fermion-Higgs model with two SU(2)$_L$
doublets, mostly for large values of the bare couplings. One-component
(`reduced') staggered fermions are used in a numerical simulation with the
Hybrid Monte Carlo... | 1992-12-18 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Wolfgang Bock, Christoph Frick, Jan Smit and Jeroen C. Vink |
hep-lat/9212025 | The Shifted Coupled Cluster Method: A New Approach to Hamiltonian
Lattice Gauge Theories | It is shown how to adapt the non-perturbative coupled cluster method of
many-body theory so that it may be successfully applied to Hamiltonian lattice
$SU(N)$ gauge theories. The procedure involves first writing the wavefunctions
for the vacuum and excited states in terms of linked clusters of gauge
invariant excitatio... | 1992-12-18 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | C.H.Llewellyn Smith and N.J.Watson |
hep-lat/9212020 | Large N Lattice QED | We study the $\beta, N$ critical behaviour of non compact QED with $N$
species of light fermions, using a method we have proposed for unquenched
simulations. We find that there exist two phase transition lines: one, second
order, and the other, first order, that approaches asymptotically the $\beta=0$
axis. These two l... | 1992-12-17 | 2009-10-22 | [
"hep-lat"
] | V. Azcoiti, G. Di Carlo and A.F. Grillo |
hep-lat/9212021 | Multigrid Methods for the Computation of Propagators in Gauge Fields | NOTE: this is a shortened version of the abstract of the paper.
Multigrid methods for propagators in gauge fields are investigated.
Gauge fields are incorporated in algorithms in a covariant way. This avoids
the necessity for gauge fixing in computations of propagators.
The kernel $C$ of the restriction operator ... | 1992-12-17 | 2015-06-25 | [
"hep-lat"
] | Thomas Kalkreuter |
hep-lat/9212019 | Infinitely many regulator fields for chiral fermions | We show that two recent independent proposals for regularizing a chiral gauge
theory stem from one common trick. If the anomaly free complex representation
carried by the right handed fermi--fields is $r$ one constructs a vector like
theory with flavored right handed fermionic matter in $r+\bar r$ but with a
mass matri... | 1992-12-15 | 2009-10-22 | [
"hep-lat",
"hep-ph",
"hep-th"
] | Rajamani Narayanan and Herbert Neuberger |
hep-lat/9212018 | Heavy Quark Physics | Lattice calculations of heavy quark systems provide very good measures of the
lattice spacing, a key element in recent determinations of the strong coupling
constant using lattice methods. They also provide excellent testing grounds for
lattice methods in general. I review recent phenomenological and technical
developm... | 1992-12-14 | 2010-11-01 | [
"hep-lat"
] | Paul B. Mackenzie |
hep-lat/9212017 | Progress in Lattice Field Theory Algorithms | I present a summary of recent algorithmic developments for lattice field
theories. In particular I give a pedagogical introduction to the new
Multicanonical algorithm, and discuss the relation between the Hybrid
Overrelaxation and Hybrid Monte Carlo algorithms. I also attempt to clarify the
role of the dynamical critic... | 1992-12-14 | 2009-10-22 | [
"hep-lat"
] | A. D. Kennedy |
hep-lat/9212016 | Baryon Octet to Decuplet Electromagnetic Transitions | The electromagnetic transition moments of the $SU(3)$-flavor baryon octet to
decuplet are examined within a lattice simulation of quenched QCD. The magnetic
transition moment for the $N \; \gamma \to \Delta$ channel is found to be in
agreement with recent experimental analyses. The lattice results indicate
$\mu_{p \Del... | 1992-12-13 | 2008-11-26 | [
"hep-lat",
"hep-ph"
] | Derek B. Leinweber, Terrence Draper and R.M. Woloshyn |
hep-lat/9212015 | Mass Spectrum and Bounds on the Couplings in Yukawa Models With
Mirror-Fermions | The $\rm SU(2)_L\otimes SU(2)_R$ symmetric Yukawa model with mirror-fermions
in the limit where the mirror-fermion is decoupled is studied both analytically
and numerically. The bare scalar self-coupling $\lambda$ is fixed at zero and
infinity. The phase structure is explored and the relevant phase transition is
found ... | 1992-12-12 | 2010-12-23 | [
"hep-lat"
] | L. Lin, G. M\"unster, M. Plagge, I. Montvay, H. Wittig, C. Frick, T.
Trappenberg |
hep-lat/9212014 | A New Action for Heavy Lattice Fermions | I describe a unified formalism for lattice fermions, in which the
relativistic action of Wilson and the nonrelativistic and static actions appear
as special cases. It is valid at all values of $m_q a$, including $m_q a
\approx 1$. In the limit $m_q a \ll 1 $, the formulation reduces to the light
quark action of Wilson.... | 1992-12-11 | 2008-02-03 | [
"hep-lat"
] | Paul B. Mackenzie |
hep-lat/9212013 | Finite-Size Effects in the Interface of 3D Ising Model | The interface between domains of opposite magnetization in the 3D Ising model
near the critical temperature displays universal finite-size effects which can
be described in terms of a gaussian model of capillary waves. It turns out that
these finite-size corrections depend rather strongly on the shape of the
lattice. T... | 1992-12-11 | 2009-10-22 | [
"hep-lat",
"cond-mat",
"hep-th"
] | M.Caselle, F.Gliozzi and S.Vinti |
hep-lat/9212010 | The Euclidean Spectrum of Kaplan's Lattice Chiral Fermions | We consider the (2n+1)-dimensional euclidean Dirac operator with a mass term
that looks like a domain wall, recently proposed by Kaplan to describe chiral
fermions in $2n$ dimensions. In the continuum case we show that the euclidean
spectrum contains {\it no} bound states with non-zero momentum. On the lattice,
a bound... | 1992-12-10 | 2009-10-22 | [
"hep-lat",
"hep-ph"
] | Yigal Shamir |
hep-lat/9212009 | Autocorrelation in Updating Pure SU(3) Lattice Gauge Theory by the use
of Overrelaxed Algorithms | We measure the sweep-to-sweep autocorrelations of blocked loops below and
above the deconfinement transition for SU(3) on a $16^4$ lattice using
20000-140000 Monte-Carlo updating sweeps. A divergence of the autocorrelation
time toward the critical $\beta$ is seen at high blocking levels. The peak is
near $\beta$ = 6.33... | 1992-12-10 | 2009-10-22 | [
"hep-lat"
] | K. Akemi, Ph. deForcrand, M. Fujisaki, T. Hashimoto, H.C. Hege, S.
Hioki, O. Miyamura, A. Nakamura, M. Okuda I.O. Stamatescu, Y. Tago and T.
Takaishi |
hep-lat/9212012 | Possible Failure of Asymptotic Freedom in Two-Dimensional $RP^2$ and
$RP^3$ $\sigma$-Models | We have simulated the two-dimensional $RP^2$ and $RP^3$ $\sigma$-models, at
correlation lengths up to about 220 (resp.\ 30), using a Wolff-type embedding
algorithm. We see no evidence of asymptotic scaling. Indeed, the data rule out
the conventional asymptotic scaling scenario at all correlation lengths less
than about... | 1992-12-10 | 2009-10-22 | [
"hep-lat"
] | S. Caracciolo, R. G. Edwards, A. Pelissetto and A. D. Sokal |
hep-lat/9212011 | Phase Structure of Compact $QED_3$ with Massless Fermions | In the framework of (2+1)-dimensional compact lattice QED with light
fermions, we investigate the phase diagram in the $(\beta, N)$ plane. The
approximations involved are related to an expansion of the effective fermionic
action as a power series of the flavor number $N$. We also develop a new
mechanism for understandi... | 1992-12-10 | 2015-06-25 | [
"hep-lat"
] | V. Azcoiti and X.Q. Luo |
hep-lat/9212008 | Renormalization Group Flow in non-compact QED with two charged staggered
Fermions | We have investigated a system with two sets of staggered fermions with
charges 1 and -1/2 coupling to a non-compact U(1) gauge field in 4 dimensions.
The model exhibits breaking of chiral symmetries of both fermions at different
values of beta. Chiral condensates, renormalized fermion masses and
renormalized charges ha... | 1992-12-08 | 2009-10-22 | [
"hep-lat"
] | Arifa Ali Khan (HLRZ Juelich) |
hep-lat/9212007 | INvestigation Of The Biconjugate Gradient Algorithm For The Inversion Of
Fermion Matrices | An algorithm for the numerical inversion of large matrices, the biconjugate
gradient algorithm (BGA), is investigated in view of its use for Monte Carlo
simulations of fermionic field theories. It is compared with the usual
conjugate gradient algorithm (CGA) and the minimal residue algorithm (MRA)
within a Higgs-Yukawa... | 1992-12-08 | 2007-05-23 | [
"hep-lat"
] | Markus Plagge |
hep-lat/9212006 | The Crumpling Transition Revisited | The ``crumpling" transition, between rigid and crumpled surfaces, has been
object of much discussion over the past years. The common lore is that such
transition should be of second order. However, some lattice versions of the
rigidity term on fixed connectivity surfaces seem to suggest that the
transition is of higher... | 1992-12-08 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | M. Baig and D. Espriu |
hep-lat/9212005 | Gauge fixing and Gribov copies in pure Yang-Mills on a circle | %In order to understand how gauge fixing can be affected on the %lattice, we
first study a simple model of pure Yang-mills theory on a %cylindrical
spacetime [$SU(N)$ on $S^1 \times$ {\bf R}] where the %gauge fixed subspace is
explicitly displayed. On the way, we find that %different gauge fixing
procedures lead to dif... | 1992-12-07 | 2009-10-22 | [
"hep-lat",
"hep-th"
] | James E. Hetrick |
hep-lat/9212004 | Magnetic Monopoles in non-compact QED - is there a Phase Transition? | The existence of the monopole condensation transition reported by
Kocic et al. in non-compact, quenched QED is tested. No phase transition is
found. This shows that divergence of the `monopole susceptibility' introduced
by Hands and Wensley is not a reliable indicator of second order phase
transitions. In view of the... | 1992-12-06 | 2008-11-26 | [
"hep-lat"
] | P.E.L. Rakow |
hep-lat/9212003 | Kazakov-Migdal Induced Gauge Theory and the Coupling of 2D Quantum
Gravity to D=1 Matter | Recently Kazakov and Migdal proposed a new approach to the large $N$ limit of
SU(N) gauge theories which could hopefully describe the asymptotically free
fixed point of QCD in 4 dimensions. In this contribution we review the exact
solution of their model in the case of a $d=1$ compactified lattice and its
connection wi... | 1992-12-02 | 2009-10-22 | [
"hep-lat"
] | M. Caselle, A. D'Adda and S. Panzeri |
hep-lat/9212002 | Dirac Strings and the Nonperturbative Photon Propagator in Compact QED | A ``3D'' Mathematica@-generated picture of monopoles and Dirac strings in
$D=2+1$ compact QED is given. In the Villain approximation, the monopole part
of the partition function factorizes from the Dirac string part, which
generates the photon propagator. Numerical experiments in exact compact QED
confirm this result: ... | 1992-12-02 | 2008-02-03 | [
"hep-lat",
"cond-mat"
] | Ken Yee |
hep-lat/9212001 | Chiral fermions in two dimensions? | Quenched studies of a global U(1) symmetric Wilson-Yukawa model in two
dimensions show no evidence of a charged fermion in the vortex phase at strong
Wilson-Yukawa coupling while there is strong indication of a massive neutral
fermion. However, with the U(1)$_L$ gauge field turned on, we use dimensional
arguments to su... | 1992-12-01 | 2009-10-22 | [
"hep-lat"
] | Wolfgang Bock, Asit K. De, Erich Focht and Jan Smit |
hep-lat/9211066 | Running Coupling in pure gauge theories using the Schr\"odinger
functional | Schr\"odinger functional, the propagation kernel for going from some field
configuration at time $x^0=0$ to some other configuration at $x^0=T$, is used
to define a running coupling, $\bar g^2(L)$, at a length scale, $L$, in pure
gauge theories. Using a lattice formulation and finite size scaling techniques,
this runni... | 1992-11-30 | 2007-05-23 | [
"hep-lat"
] | Rajamani Narayanan |
hep-lat/9211062 | Algebraic Techniques for Enumerating Self-Avoiding Walks on the Square
Lattice | We describe a new algebraic technique for enumerating self-avoiding walks on
the rectangular lattice. The computational complexity of enumerating walks of
$N$ steps is of order $3^{N/4}$ times a polynomial in $N$, and so the approach
is greatly superior to direct counting techniques. We have enumerated walks of
up to 3... | 1992-11-27 | 2008-11-26 | [
"hep-lat"
] | A R Conway, I G Enting and A J Guttmann |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.