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 |
|---|---|---|---|---|---|---|
hep-th/9208020 | The Problem of Large-N Phase Transition in Kazakov-Migdal Model of
Induced QCD | We study the lattice gauge model proposed recently by Kazakov and Migdal for
inducing QCD. We discuss an extra local Z_N which is a symmetry of the model
and propose of how to construct observables. We discuss the role of the large-N
phase transition which should occur before the one associated with the
continuum limit... | 1992-08-06 | 2009-10-22 | [
"hep-th",
"hep-lat"
] | S.Khokhlachev and Yu.Makeenko |
hep-th/9208019 | 2D Quantum Gravity and The Miura Map | We study the sL(3,C) mKDV string theories. We obtain the flows and the string
equations. Using the generalized Miura map, we show that we have an unification
of these models with the [P,Q]=Q sL(3,C) KDV ones in the framework of
open-closed string theories in minimal models backgrounds. | 1992-08-06 | 2009-10-22 | [
"hep-th"
] | L.Houart |
hep-th/9208017 | Coherent States of the SU(N) groups | Coherent states $(CS)$ of the $SU(N)$ groups are constructed explicitly and
their properties are investigated. They represent a nontrivial generalization
of the spining $CS$ of the $SU(2)$ group. The $CS$ are parametrized by the
points of the coset space, which is, in that particular case, the projective
space $CP^{N-1... | 1992-08-05 | 2009-10-22 | [
"hep-th"
] | D.M.Gitman and A.L.Shelepin |
hep-th/9308022 | Particles, Superparticles and Super Yang--Mills | This paper is concerned with theories describing spinning particles that are
formulated in terms of actions possessing either local world-line supersymmetry
or local fermionic {\it kappa} invariance. These classical actions are obtained
by adding a finite number of spinor or vector coordinates to the usual
space-time c... | 1992-08-05 | 2009-10-22 | [
"hep-th"
] | C. M. Hull and J.-L. Vazquez-Bello |
hep-th/9208016 | SL(2,R) Chern-Simons Theories with Rational Charges and Two-dimensional
Conformal Field Theories | This paper (completed March 1992) is an extensively revised and expanded
version of work which appeared July 1991 on the initial incarnation of the
hepth bulletin board, and which was published in the Proceedings of the
Workshop on String Theory, Trieste, March 1991. Abstract We present a
hamiltonian quantization of th... | 1992-08-05 | 2009-10-22 | [
"hep-th"
] | C. Imbimbo |
hep-th/9208018 | Gravity Theories with Lightlike Sources in D=3 | Spacetimes generated by a lightlike particle source for topologically massive
gravity and its limits - Einstein gravity and the pure gravitational
Chern-Simons model - are obtained both by solving the field equations and by
infinite boosts of static metrics. The resulting geometries are the first known
solutions of top... | 1992-08-05 | 2010-04-06 | [
"hep-th",
"gr-qc"
] | S. Deser and A. Steif |
hep-th/9208013 | On the quantum KP hierarchy and its relation to the non-linear
Schr\"odinger equation | We establish a relation between the classical non-linear Schr\"odinger
equation and the KP hierarchy, and we extend this relation to the quantum case
by defining a quantum KP hierarchy. We present evidence that an integrable
hierarchy of equations is obtained by quantizing the first Hamiltonian
structure of the KdV equ... | 1992-08-04 | 2009-10-22 | [
"hep-th"
] | M.D. Freeman and P. West |
hep-th/9208012 | Area Law and Continuum Limit in "Induced QCD" | We investigate a class of operators with non-vanishing averages in a
D-dimensional matrix model recently proposed by Kazakov and Migdal. Among the
operators considered are ``filled Wilson loops" which are the most reasonable
counterparts of Wilson loops in the conventional Wilson formulation of lattice
QCD. The average... | 1992-08-04 | 2009-10-22 | [
"hep-th"
] | I.I. Kogan, A. Morozov, G.W. Semenoff and N. Weiss |
hep-th/9208014 | Quantization of systems with time-dependent constraints. Example of
relativistic particle in plane wave | A modification of the canonical quantization procedure for systems with
time-dependent second-class constraints is discussed and applied to the
quantization of the relativistic particle in a plane wave. The time dependence
of constraints appears in the problem in two ways. The Lagrangian depends on
time explicitly by o... | 1992-08-04 | 2010-04-06 | [
"hep-th"
] | S.P. Gavrilov, D.M. Gitman |
hep-th/9208015 | One-loop Vilkovisky-DeWitt Counterterms for 2D Gravity plus Scalar Field
Theory | The divergent part of the one-loop off-shell effective action is computed for
a single scalar field coupled to the Ricci curvature of 2D gravity ($c \phi
R$), and self interacting by an arbitrary potential term $V(\phi)$. The
Vilkovisky-DeWitt effective action is used to compute gauge-fixing independent
results. In our... | 1992-08-04 | 2009-10-22 | [
"hep-th",
"gr-qc"
] | R. Kantowski, Caren Marzban |
hep-th/9208009 | A Geometrical Approach to Time-Dependent Gauge-Fixing | When a Hamiltonian system is subject to constraints which depend explicitly
on time, difficulties can arise in attempting to reduce the system to its
physical phase space. Specifically, it is non-trivial to restrict the system in
such a way that one can find a Hamiltonian time-evolution equation involving
the Dirac bra... | 1992-08-03 | 2015-06-26 | [
"hep-th",
"gr-qc"
] | Jonathan M. Evans and Philip A. Tuckey |
hep-th/9208008 | Braided Matrix Structure of the Sklyanin Algebra and of the Quantum
Lorentz Group | Braided groups and braided matrices are novel algebraic structures living in
braided or quasitensor categories. As such they are a generalization of
super-groups and super-matrices to the case of braid statistics. Here we
construct braided group versions of the standard quantum groups $U_q(g)$. They
have the same FRT g... | 1992-08-03 | 2009-10-22 | [
"hep-th",
"math.QA"
] | Shahn Majid |
hep-th/9208006 | Quantum and Braided Linear Algebra | Quantum matrices $A(R)$ are known for every $R$ matrix obeying the Quantum
Yang-Baxter Equations. It is also known that these act on `vectors' given by
the corresponding Zamalodchikov algebra. We develop this interpretation in
detail, distinguishing between two forms of this algebra, $V(R)$ (vectors) and
$V^*(R)$ (cove... | 1992-08-03 | 2009-10-22 | [
"hep-th",
"math.QA"
] | Shahn Majid |
hep-th/9208005 | Quantum Random Walks and Time Reversal | Classical random walks and Markov processes are easily described by Hopf
algebras. It is also known that groups and Hopf algebras (quantum groups) lead
to classical and quantum diffusions. We study here the more primitive notion of
a quantum random walk associated to a general Hopf algebra and show that it has
a simple... | 1992-08-03 | 2015-06-26 | [
"hep-th"
] | S. Majid |
hep-th/9208010 | A Class of Bicovariant Differential Calculi on Hopf Algebras | We introduce a large class of bicovariant differential calculi on any quantum
group $A$, associated to $Ad$-invariant elements. For example, the deformed
trace element on $SL_q(2)$ recovers Woronowicz' $4D_\pm$ calculus. More
generally, we obtain a sequence of differential calculi on each quantum group
$A(R)$, based on... | 1992-08-03 | 2009-10-22 | [
"hep-th",
"math.QA"
] | Tomasz Brzezinski and Shahn Majid |
hep-th/9208011 | Exact resonance A-D-E S-matrices and their renormalization group
trajectories | We introduce the A-D-E resonance factorized models as an appropriate
analytical continuation of the Toda S-matrices to the complex values of their
coupling constant. An investigation of the associated Casimir energy, via the
thermodynamic Bethe ansatz, reveals a rich pattern of renormalization group
trajectories interp... | 1992-08-03 | 2009-10-22 | [
"hep-th"
] | M.J. Martins |
hep-th/9208007 | Quantum group gauge theory on quantum spaces | We construct quantum group-valued canonical connections on quantum
homogeneous spaces, including a q-deformed Dirac monopole on the quantum sphere
of Podles quantum differential coming from the 3-D calculus of Woronowicz on
$SU_q(2)$ . The construction is presented within the setting of a general
theory of quantum prin... | 1992-08-03 | 2009-10-22 | [
"hep-th"
] | Tomasz Brzezinski and Shahn Majid |
hep-th/9208003 | Lagrangians for the W-Algebra Models | The field algebra of the minimal models of W-algebras is amenable to a very
simple description as a polynomial algebra generated by few elementary fields,
corresponding to order parameters. Using this description, the complete
Landau-Ginzburg lagrangians for these models are obtained. Perturbing these
lagrangians we ca... | 1992-08-03 | 2009-10-22 | [
"hep-th"
] | J.C. Gaite |
hep-th/9208001 | $SL(2,R)xSU(2)/R^2$ string model in curved spacetime and exact conformal
results | Pursuing further the recent methods in the algebraic Hamiltonian approach to
gauged WZW models, we apply them to the bosonic SL(2,R) X SU(2)/R^2 model
recently investigated by Nappi and Witten. We find the global space and compute
the conformally exact metric and dilaton fields to all orders in the $1/k$
expansion. The... | 1992-08-02 | 2009-10-22 | [
"hep-th"
] | I. Bars and K. Sfetsos |
hep-th/9208002 | Some Remarks About Induced QCD | Migdal and Kazakov have suggested that lattice QCD with an adjoint
representation scalar in the infinite coupling limit could induce QCD.
I find an exact saddlepoint of this theory for infinite $N$ in the case of a
quadratic scalar potential. I discuss some aspects of this solution and also
show how the continuum D=1... | 1992-08-02 | 2009-10-22 | [
"hep-th"
] | David J. Gross |
hep-th/9207118 | Heterotic String Models in Curved Spacetime | We explore the possibility of string theories in only four spacetime
dimensions without any additional compactified dimensions. We show that,
provided the theory is defined in curved spacetime that has a cosmological
interpration, it is possible to construct consistent heterotic string theories
based on a few non-compa... | 1992-08-01 | 2008-11-26 | [
"hep-th",
"hep-ph"
] | Itzhak Bars |
hep-th/9207117 | Chiral gravity in two dimensions | It is shown that conformal matter with $c_{\ssc L}\not=c_{\ssc R}$ can be
consistently coupled to two-dimensional `frame' gravity. The theory is
quantized, following David, and Distler and Kawai, using the derivation of
their {\it ansatz} due to Mavromatos and Miramontes, and D'Hoker and Kurzepa.
New super-selection ru... | 1992-07-31 | 2009-10-22 | [
"hep-th"
] | R.C. Myers and V. Periwal |
hep-th/9207113 | Gravitino one-loop contribution to Planckian Scattering | Corrections to the semiclassical approximation in nearly forward Planckian
energy collisions are here reconsidered. Starting from the one-loop superstring
amplitude, we are able to disentangle the first subleading high-energy
contribution at large impact parameters, and we thus directly compute the
one-loop correction ... | 1992-07-31 | 2009-10-22 | [
"hep-th"
] | A.Bellini, M.Ademollo and M.Ciafaloni |
hep-th/9207111 | Comment on the Generation Number in Orbifold Compactifications | There has been some confusion concerning the number of $(1,1)$-forms in
orbifold compactifications of the heterotic string in numerous publications. In
this note we point out the relevance of the underlying torus lattice on this
number. We answer the question when different lattices mimic the same physics
and when this... | 1992-07-31 | 2010-11-01 | [
"hep-th"
] | Jens Erler and Albrecht Klemm |
hep-th/9207116 | Deformations of Dynamics Associated to the Chiral Potts Model | We describe deformations of non-linear (birational) representations of
discrete groups generated by involutions, having their origin in the theory of
the symmetric five-state Potts model. One of the deformation parameters can be
seen as the number $q$ of states of a chiral Potts models. This analogy becomes
exact when ... | 1992-07-31 | 2015-06-26 | [
"hep-th"
] | M.P. Bellon, J-M. Maillard, G. Rollet, C-M. Viallet |
hep-th/9207110 | Relativistic Rigid Particles: Classical Tachyons and Quantum Anomalies | Causal rigid particles whose action includes an {\it arbitrary} dependence on
the world-line extrinsic curvature are considered. General classes of solutions
are constructed, including {\it causal tachyonic} ones. The Hamiltonian
formulation is developed in detail except for one degenerate situation for
which only part... | 1992-07-31 | 2009-10-22 | [
"hep-th"
] | Jan Govaerts |
hep-th/9207112 | Planckian Vertices on High Genus Riemann Surfaces | We suggest a method to compute leading contribution at Planckian energies for
superstring scattering amplitudes of any genus. In particular we test the
method at one-loop level by comparison with previous result for the Regge
trajectory renormalization. Modular invariance of these asymptotic terms are
also discussed. | 1992-07-31 | 2009-10-22 | [
"hep-th"
] | A.Bellini |
hep-th/9207115 | Towards a path integral for the pure-spin connection formulation of
gravity | A proposal for the path-integral of pure-spin-connection formulation of
gravity is described, based on the two-form formulation of Capovilla et. al. It
is shown that the resulting effective-action for the spin-connection, upon
functional integration of the two-form field $\Sigma$ and the auxiliary matrix
field $\psi$ i... | 1992-07-31 | 2010-04-06 | [
"hep-th"
] | Abhijit K. Kshirsagar |
hep-th/9207114 | Smooth Bosonization II: The Massive Case | The (1+1)-dimensional bosonization relations for fermionic mass terms are
derived by choosing a specific gauge in an enlarged gauge-invariant theory
containing both fermionic and bosonic fields. The fermionic part of the
generating functional subject to the gauge constraint can be cast into the form
of a strongly coupl... | 1992-07-31 | 2009-10-22 | [
"hep-th"
] | P.H. Damgaard, H.B. Nielsen and R. Sollacher |
hep-th/9207104 | Degenerations of Generalized Krichever Novikov algebras on Tori | Degenerations of Lie algebras of meromorphic vector fields on elliptic curves
(i.e. complex tori) which are holomorphic outside a certain set of points
(markings) are studied. By an algebraic geometric degeneration process certain
subalgebras of Lie algebras of meromorphic vector fields on P^1 the Riemann
sphere are ob... | 1992-07-30 | 2014-11-18 | [
"hep-th"
] | Martin Schlichenmaier |
hep-th/9207106 | The New Charged Massless States of Quantum Electrodynamics | Quantum Electrodynamics can be formulated as the theory of an antisymmetric
tensor gauge field. In this formulation the topological current of this field
appears as an additional source for the electromagnetic field. The topological
charge therefore acts physically as an electric charge. The topologically
nontrivial, e... | 1992-07-30 | 2007-05-23 | [
"hep-th"
] | E.C.Marino |
hep-th/9207108 | Lineal gravity from planar gravity | We show how to obtain the two-dimensional black hole action by dimensional
reduction of the three-dimensional Einstein action with a non-zero cosmological
constant. Starting from the Chern-Simons formulation of 2+1 gravity, we obtain
the 1+1 dimensional gauge formulation given by Verlinde. Remarkably, the
proposed redu... | 1992-07-30 | 2009-10-22 | [
"hep-th"
] | Ana Achucarro |
hep-th/9207109 | Chiral Rings and Physical States in c<1 String Theory | We show how the double cohomology of the String and Felder BRST charges
naturally leads to the ring structure of $c<1$ strings. The chiral ring is a
ring of polynomials in two variables modulo an equivalence relation of the form
$x^p \simeq y^{p+1}$ for the (p+1,p) model. We also study the states
corresponding to the e... | 1992-07-30 | 2009-10-22 | [
"hep-th"
] | S. Govindarajan, T. Jayaraman and V. John |
hep-th/9207107 | $w_{\infty}$-Currents in 3-Dimensional Toda Theory | Chiral densities obeying a $w_{\infty}$ Poisson--bracket algebra are
constructed for the $2+1\,\, A_{\infty}$ -- Toda field theory, using its
alternative $w_{\infty}$ -- Toda representation. They are obtained from formal
traces of powers of the Lax operator. The spin 2 and 3 currents are explicitely
derived, and the co... | 1992-07-30 | 2009-10-22 | [
"hep-th"
] | Jean Avan |
hep-th/9207105 | Naked and Thunderbolt Singularities in Black Hole Evaporation | If an evaporating black hole does not settle down to a non radiating remnant,
a description by a semi classical Lorentz metric must contain either a naked
singularity or what we call a thunderbolt, a singularity that spreads out to
infinity on a spacelike or null path. We investigate this question in the
context of var... | 1992-07-30 | 2010-11-01 | [
"hep-th"
] | S.W.Hawking and J.M.Stewart |
hep-th/9207099 | Energy Spectrum of Anyons in a Magnetic Field | For the many-anyon system in external magnetic field, we derive the energy
spectrum as an exact solution of the quantum eigenvalue problem with particular
topological constraints. Our results agree with the numerical spectra recently
obtained for the 3- and the 4-anyon systems. | 1992-07-29 | 2009-10-22 | [
"hep-th",
"cond-mat"
] | Fabrizio Illuminati |
hep-th/9207103 | String Theory Modifies Quantum Mechanics | We argue that the light particles in string theory obey an effective quantum
mechanics modified by the inclusion of a quantum-gravitational friction term,
induced by unavoidable couplings to unobserved massive string states in the
space-time foam. This term is related to the $W$-symmetries that couple light
particles t... | 1992-07-29 | 2009-09-11 | [
"hep-th",
"gr-qc",
"hep-ph"
] | John Ellis, N.E. Mavromatos and D.V. Nanopoulos |
hep-th/9207098 | Semi-Classical Quantization of the Many-Anyon System | We discuss the problem of N anyons in harmonic well, and derive the
semi-classical spectrum as an exactly solvable limit of the many-anyon
Hamiltonian. The relevance of our result to the solution of the anyon-gas model
is discussed. | 1992-07-29 | 2009-10-22 | [
"hep-th",
"cond-mat"
] | Fabrizio Illuminati |
hep-th/9207097 | The Large-$N$ Limit of the Two-Hermitian-matrix model by the hidden BRST
method | This paper discusses the large N limit of the two-Hermitian-matrix model in
zero dimensions, using the hidden BRST method. A system of integral equations
previously found is solved, showing that it contained the exact solution of the
model in leading order of large $N$. | 1992-07-29 | 2009-10-22 | [
"hep-th"
] | J. Alfaro |
hep-th/9207096 | Double Scaling Limit of the Supervirasoro Constraints | This paper supersedes the preprint Superloop Equations in the Double Scaling
Limit, CERN-TH-6575. It is an improved version with corrections in the
derivation of the continuum limit, a clarification of the doubling of degrees
of freedom for even potentials, and with a heuristic argument showing that the
part of the fre... | 1992-07-29 | 2019-08-17 | [
"hep-th"
] | Luis Alvarez-Gaume, K. Becker, M. Becker, R. Emparan and J. Manes |
hep-th/9207095 | Quantum Black Holes in Two Dimensions | We show that a whole class of quantum actions for dilaton-gravity, which
reduce to the CGHS theory in the classical limit, can be written as a
Liouville-like theory. In a sub-class of this, the field space singularity
observed by several authors is absent, regardless of the number of matter
fields, and in addition it i... | 1992-07-29 | 2010-11-01 | [
"hep-th",
"gr-qc"
] | S. P. de Alwis |
hep-th/9207102 | W Algebras and Superalgebras from Constrained WZW Models: A Group
Theoretical Classification | We present a classification of $W$ algebras and superalgebras arising in
Abelian as well as non Abelian Toda theories. Each model, obtained from a
constrained WZW action, is related with an $Sl(2)$ subalgebra (resp. $OSp(1|2)$
superalgebra) of a simple Lie algebra (resp. superalgebra) $\cg$. However, the
determination ... | 1992-07-29 | 2009-10-22 | [
"hep-th"
] | L. Frappat, E. Ragoucy and P. Sorba |
hep-th/9207100 | Thermal Reservoir coupled to External Field and Quantum Dissipation | In the framework of the Caldeira-Leggett model of dissipative quantum
mechanics, we investigate the effects of the interaction of the thermal
reservoir with an external field. In particular, we discuss how the interaction
modifies the conservative dynamics of the central particle, and the mechanism
of dissipation. We b... | 1992-07-29 | 2007-05-23 | [
"hep-th",
"cond-mat"
] | Fabrizio Illuminati & Marco Patriarca |
hep-th/9207101 | Quantum sl_n Toda field theories | We quantize $sl_n$ Toda field theories in a periodic lattice. We find the
quantum exchange algebra in the diagonal monodromy (Bloch wave) basis in the
case of the defining representation. In the $sl_3$ case we extend the analysis
also to the second fundamental representation. We clarify, in particular, the
relation of ... | 1992-07-29 | 2009-10-22 | [
"hep-th"
] | L.Bonora and V.Bonservizi |
hep-th/9207093 | Collective Coordinate Action for Charged Sigma-Model Vortices in Finite
Geometries | In this Letter the method of Lund is applied to formulate a variational
principle for the motion of charged vortices in an effective non-linear
Schr\"{o}dinger field theory describing finite size two-dimensional quantum
Hall samples under the influence of an arbitrary perpendicular magnetic field.
Freezing out variatio... | 1992-07-28 | 2009-10-22 | [
"hep-th"
] | Theodore J. Allen |
hep-th/9207090 | Invariants of Colored Links and a Property of the Clebsch-Gordan
Coefficients of $U_q(g)$ | We show that multivariable colored link invariants are derived from the roots
of unity representations of $U_q(g)$. We propose a property of the
Clebsch-Gordan coefficients of $U_q(g)$, which is important for defining the
invariants of colored links. For $U_q(sl_2) we explicitly prove the property,
and then construct i... | 1992-07-28 | 2008-02-03 | [
"hep-th",
"math.QA"
] | Tetsuo Deguchi and Tomotada Ohtsuki |
hep-th/9207094 | Chern-Simons Gauge Theory As A String Theory | Certain two dimensional topological field theories can be interpreted as
string theory backgrounds in which the usual decoupling of ghosts and matter
does not hold. Like ordinary string models, these can sometimes be given
space-time interpretations. For instance, three-dimensional Chern-Simons gauge
theory can arise a... | 1992-07-28 | 2010-04-07 | [
"hep-th"
] | Edward Witten |
hep-th/9207091 | Broken sigma-model isometries in very special geometry | We show that the isometries of the manifold of scalars in $N=2$ supergravity
in $d=5$ space-time dimensions can be broken by the supergravity interactions.
The opposite conclusion holds for the dimensionally reduced $d=4$ theories,
where the isometries of the scalar manifold are always symmetries of the full
theory. Th... | 1992-07-28 | 2009-10-22 | [
"hep-th"
] | Bernard de Wit, Antoine Van Proeyen |
hep-th/9207092 | A One-Parameter Family of Hamiltonian Structures for the KP Hierarchy
and a Continuous Deformation of the Nonlinear $\W_{\rm KP}$ Algebra | The KP hierarchy is hamiltonian relative to a one-parameter family of Poisson
structures obtained from a generalized Adler map in the space of formal
pseudodifferential symbols with noninteger powers. The resulting $\W$-algebra
is a one-parameter deformation of $\W_{\rm KP}$ admitting a central extension
for generic va... | 1992-07-28 | 2009-10-22 | [
"hep-th"
] | J.M. Figueroa-O'Farrill, J. Mas, and E. Ramos |
hep-th/9207089 | From 2D conformal to 4D self-dual theories: quaternionic analyticity | It is shown that self-dual theories generalize to four dimensions both the
conformal and analytic aspects of two-dimensional conformal field theories. In
the harmonic space language there appear several ways to extend complex
analyticity (natural in two dimensions) to quaternionic analyticity (natural in
four dimension... | 1992-07-27 | 2009-10-22 | [
"hep-th"
] | V. Ogievetsky, F. Gursey and M. Evans |
hep-th/9207086 | Exact solution of d=1 Kazakov-Migdal induced gauge theory | We give the exact solution of the Kazakov-Migdal induced gauge model in the
case of a D=1 compactified lattice with a generic number $S$ of sites and for
any value of N. Due to the peculiar features of the model, the partition
function that we obtain also describes the vortex-free sector of the D=1
compactified bosonic... | 1992-07-27 | 2009-10-22 | [
"hep-th",
"hep-lat"
] | M. Caselle, A.D'Adda and S. Panzeri |
hep-th/9207088 | String branchings and complex tori and algebraic representations of
generalized Krichever-Novikov algebras | The propagation differential for bosonic strings on a complex torus with
three symmetric punctures is investigated. We study deformation aspects between
two point and three point differentials as well as the behaviour of the
corresponding Krichever-Novikov algebras. The structure constants are
calculated and from this ... | 1992-07-27 | 2016-09-06 | [
"hep-th"
] | Andreas Ruffing, Thomas Deck, Martin Schlichenmaier |
hep-th/9207087 | The Gravitational Field of String Matter When the Dilaton is Massive | We study numerically the gravitational field of a star made of massive and
neutral string states for the case in which the dilaton is massive. The
solution exhibits very simple scaling properties in the dilaton mass. There is
no horizon and the singularity is surrounded by a halo (the physical size of
which is inversel... | 1992-07-27 | 2009-10-22 | [
"hep-th"
] | M. Fabbrichesi and R. Iengo |
hep-th/9207084 | An introduction to non-commutative differential geometry on quantum
groups | We give a pedagogical introduction to the differential calculus on quantum
groups by stressing at all stages the connection with the classical case ($q
\rightarrow 1$ limit). The Lie derivative and the contraction operator on forms
and tensor fields are found. A new, explicit form of the Cartan--Maurer
equations is pre... | 1992-07-26 | 2009-10-22 | [
"hep-th",
"math.QA"
] | P. Aschieri and L. Castellani |
hep-th/9207085 | Deviations from Scale Invariance near a General Conformal Background | Deviations from scale invariance resulting from small perturbations of a
general two dimensional conformal field theory are studied. They are expressed
in terms of beta functions for renormalization of general couplings under local
change of scale. The beta functions for homogeneous background are given
perturbatively ... | 1992-07-26 | 2009-10-22 | [
"hep-th"
] | A.Babichenko, S.Elitzur |
hep-th/9207082 | The sine-Gordon model and the small k^+ region of light-cone
perturbation theory | The non-perturbative ultraviolet divergence of the sine-Gordon model is used
to study the $k^+ = 0$ region of light-cone perturbation theory. The light-cone
vacuum is shown to be unstable at the non-perturbative $\beta^2 = 8\pi$
critical point by a light-cone version of Coleman's variational method. Vacuum
bubbles, whi... | 1992-07-24 | 2009-10-22 | [
"hep-th",
"hep-ph"
] | Paul A. Griffin |
hep-th/9207083 | Staggered fermions and chiral symmetry breaking in transverse lattice
regulated QED | Staggered fermions are constructed for the transverse lattice regularization
scheme. The weak perturbation theory of transverse lattice non-compact QED is
developed in light-cone gauge, and we argue that for fixed lattice spacing this
theory is ultraviolet finite, order by order in perturbation theory. However,
by calc... | 1992-07-24 | 2009-10-22 | [
"hep-th",
"hep-lat"
] | Paul A. Griffin |
hep-th/9207081 | Quasi-classical limit of KP hierarchy, W-symmetries and free fermions | This paper deals with the dispersionless KP hierarchy from the point of view
of quasi-classical limit. Its Lax formalism, W-infinity symmetries and general
solutions are shown to be reproduced from their counterparts in the KP
hierarchy in the limit of $\hbar \to 0$. Free fermions and bosonized vertex
operators play a ... | 1992-07-24 | 2008-02-03 | [
"hep-th"
] | Kanehisa Takasaki and Takashi Takebe |
hep-th/9207079 | Dilatonic Black Holes, Naked Singularities and Strings | We extend a previous calculation which treated Schwarschild black hole
horizons as quantum mechanical objects to the case of a charged, dilaton black
hole. We show that for a unique value of the dilaton parameter `a', which is
determined by the condition of unitarity of the S matrix, black holes transform
at the extrem... | 1992-07-23 | 2010-12-17 | [
"hep-th"
] | P.H. Cox, B. Harms and Y. Leblanc |
hep-th/9207080 | Generalized Classical BRST Cohomology and Reduction of Poisson Manifolds | In this paper, we formulate a generalization of the classical BRST
construction which applies to the case of the reduction of a poisson manifold
by a submanifold. In the case of symplectic reduction, our procedure
generalizes the usual classical BRST construction which only applies to
symplectic reduction of a symplect... | 1992-07-23 | 2009-10-22 | [
"hep-th"
] | Takashi Kimura |
hep-th/9207078 | BRST cohomology ring in 2D gravity coupled to minimal models | The ring structure of Lian-Zuckerman states for $(q,p)$ minimal models
coupled to gravity is shown to be ${\cal R}={\cal R}_0\otimes {\bf C}
[w,w^{-1}]$ where ${\cal R}_0$ is the ring of ghost number zero operators
generated by two elements and $w$ is an operator of ghost number $-1$. Some
examples are discussed in det... | 1992-07-23 | 2007-05-23 | [
"hep-th"
] | H. Kanno and M.H. Sarmadi |
hep-th/9207075 | R-matrix Approach to Quantum Superalgebras su_{q}(m|n) | Quantum superalgebras $su_{q}(m\mid n)$ are studied in the framework of
$R$-matrix formalism. Explicit parametrization of $L^{(+)}$ and $L^{(-)}$
matrices in terms of $su_{q}(m\mid n)$ generators are presented. We also show
that quantum deformation of nonsimple superalgebra $su(n\mid n)$ requires its
extension to $u(n\... | 1992-07-22 | 2009-10-22 | [
"hep-th",
"math.QA"
] | D. Chang, I. Phillips, Lev Rozansky |
hep-th/9207071 | Ward Identities for Affine-Virasoro Correlators | Generalizing the Knizhnik-Zamolodchikov equations, we derive a hierarchy of
non-linear Ward identities for affine-Virasoro correlators. The hierarchy
follows from null states of the Knizhnik-Zamolodchikov type and the assumption
of factorization, whose consistency we verify at an abstract level. Solution of
the equatio... | 1992-07-22 | 2008-11-26 | [
"hep-th"
] | M.B. Halpern and N.A. Obers |
hep-th/9207074 | Quantum Kinks: Solitons at Strong Coupling | We examine solitons in theories with heavy fermions. These ``quantum''
solitons differ dramatically from semi-classical (perturbative) solitons
because fermion loop effects are important when the Yukawa coupling is strong.
We focus on kinks in a $(1+1)$--dimensional $\phi^4$ theory coupled to
fermions; a large-$N$ expa... | 1992-07-22 | 2009-10-22 | [
"hep-th",
"hep-ph"
] | Stephen G. Naculich |
hep-th/9207076 | Simple Quantum Systems in Spacetimes with Closed Timelike Curves | Three simple examples illustrate properties of path integral amplitudes in
fixed background spacetimes with closed timelike curves: non-relativistic
potential scattering in the Born approximation is non-unitary, but both an
example with hard spheres and the exact solution of a totally discrete model
are unitary. | 1992-07-22 | 2009-10-22 | [
"hep-th"
] | H. David Politzer |
hep-th/9207077 | Semi-classical Approach to Charged Dilatonic Black Hole in Two
Dimensions | We consider exactly solvable semi-classical theory of two dimensional
dilatonic gravity with electromagnetic interactions. As was done in the paper
by Russo, Susskind and Thorlacius, the term which changes the kinetic term is
added to the action. The theory contains massless fermions as matter fields and
there appear t... | 1992-07-22 | 2010-11-01 | [
"hep-th"
] | Shin'ichi Nojiri and Ichiro Oda |
hep-th/9207073 | Integrable N=2 Supersymmetric Field Theories | Some additional references are included on the last 3 pages. | 1992-07-22 | 2009-10-22 | [
"hep-th"
] | J.M. Evans and T.J. Hollowood |
hep-th/9207072 | New N=1 Extended Superconformal Algebras with Two and Three Generators | In this paper we consider extensions of the super Virasoro algebra by one and
two super primary fields. Using a non-explicitly covariant approach we compute
all SW-algebras with one generator of dimension up to 7 in addition to the
super Virasoro field. In complete analogy to W-algebras with two generators
most results... | 1992-07-22 | 2015-02-03 | [
"hep-th",
"gr-qc"
] | R. Blumenhagen, W. Eholzer, A. Honecker, R. Huebel |
hep-th/9207068 | A Quantum Anomaly For Rigid Particles | Canonical quantisation of rigid particles is considered paying special
attention to the restriction on phase space due to causal propagation. A mixed
Lorentz-gravitational anomaly is found in the commutator of Lorentz boosts with
world-line reparametrisations. The subspace of gauge invariant physical states
is therefor... | 1992-07-21 | 2009-10-22 | [
"hep-th"
] | Jan Govaerts |
hep-th/9207067 | A BRST Operator for non-critical W-Strings | We construct the BRST operator for non-critical $W_3$-strings and discuss the
tachyon-like spectrum. For $N$-punctured spheres with $N \leq 5$ we briefly
describe a formal definition of the integral over $W_3$-moduli space. | 1992-07-21 | 2009-10-22 | [
"hep-th"
] | M. Bershadsky, W. Lerche, D. Nemeschansky, N.P. Warner |
hep-th/9207069 | A New Family of Diagonal Ade-Related Scattering Theories | We propose the factorizable S-matrices of the massive excitations of the
non-unitary minimal model $M_{2,11}$ perturbed by the operator $\Phi_{1,4}$.
The massive excitations and the whole set of two particle S-matrices of the
theory is simply related to the $E_8$ unitary minimal scattering theory. The
counting argument... | 1992-07-21 | 2009-10-22 | [
"hep-th"
] | F.Ravanini, R. Tateo and A.Valleriani |
hep-th/9207070 | Horizons Inside Classical Lumps | Hopefully tex-able version. | 1992-07-21 | 2009-10-22 | [
"hep-th",
"gr-qc"
] | David Kastor and Jennie Traschen |
hep-th/9207066 | The Global Phase Space Structure of the Wess-Zumino-Witten Model | We present a new parametrisation of the space of solutions of the
Wess-Zumino-Witten model on a cylinder, with target space a compact, connected
Lie group G. Using the covariant canonical approach the phase space of the
theory is shown to be the co-tangent bundle of the loop group of the Lie group
G, in agreement with ... | 1992-07-20 | 2009-10-09 | [
"hep-th"
] | G. Papadopoulos and B. Spence |
hep-th/9207063 | Physical Degrees of Freedom in 2-D String Field Theories | States in the absolute (semi-relative) cohomology but not in the relative
cohomology are examined through the component decomposition of the string field
theory action for the 2-D string. It is found that they are auxiliary fields
without kinetic terms, but are important for instance in the master equation
for the Ward... | 1992-07-20 | 2010-11-01 | [
"hep-th"
] | Norisuke Sakai and Yoshiaki Tanii |
hep-th/9207064 | Irreversibility of the Renormalization Group Flow in Two Dimensional
Quantum Gravity | We argue that the torus partition sum in $2d$ (super) gravity, which counts
physical states in the theory, is a decreasing function of the renormalization
group scale. As an application we chart the space of $(\hat c\leq1)$ $c\leq1$
models coupled to (super) gravity, confirming and extending ideas due to A.
Zamolodchik... | 1992-07-20 | 2015-06-26 | [
"hep-th"
] | David Kutasov |
hep-th/9207065 | Light-Cone Quantization of the c=2 Matrix Model | We study the large $N$ limit of an interacting \td\ matrix field theory,
whose perturbative expansion generates the sum over planar random graphs
embedded in two dimensions. In the \lc\ quantization the theory possesses
closed string excitations which become free as $N\to\infty$. If the
longitudinal momenta are discret... | 1992-07-20 | 2009-10-22 | [
"hep-th"
] | S.Dalley and I.Klebanov |
hep-th/9207058 | Remarks on the Additional Symmetries and W-Constraints in the
Generalized KdV Hierarchy | Additional symmetries of the $p$-reduced KP hierarchy are generated by the
Lax operator $L$ and another operator $M$, satisfying $res (M^n L^{m+n/p})$ = 0
for $1 \leq n \leq p-1$ and $m \geq -1$ with the condition that ${\partial L
\over {\partial t_{kp}}}$ = 0, $k$ = 1, 2,..... We show explicitly that the
generators o... | 1992-07-16 | 2009-10-22 | [
"hep-th"
] | Sudhakar Panda and Shibaji Roy |
hep-th/9207060 | Type II p-branes: the brane-scan revisited | We re-examine the classification of supersymmetric extended objects in the
light of the recently discovered Type II p-branes, previously thought not to
exist for p> 1. We find new points on the brane-scan only in D = 10 and then
only for p = 3(Type IIB), p = 4 (Type IIA), p = 5 (Type IIA and IIB) and p = 6
(Type IIA). ... | 1992-07-16 | 2011-07-19 | [
"hep-th"
] | M. J. Duff and J. X. Lu |
hep-th/9207062 | A Note on N=2 Superstrings | In this note we investigate the generalised critical $N=2$ superstrings in
$(1,2p)$ spacetime signature. We calculate the four-point functions for the
tachyon operators of these theories. In contrast to the usual $N=2$ superstring
in $(2,2)$ spacetime, the four-point functions do not vanish. The exchanged
particles of ... | 1992-07-16 | 2015-06-26 | [
"hep-th"
] | J.R. Bienkowska, H. Lu |
hep-th/9207059 | The vacuum polarization around an axionic stringy black hole | We consider the effect of vacuum polarization around the horizon of a 4
dimensional axionic stringy black hole. In the extreme degenerate limit
($Q_a=M$), the lower limit on the black hole mass for avoiding the polarization
of the surrounding medium is $M\gg (10^{-15}\div 10^{-11})m_p$ ($m_p$ is the
proton mass), accor... | 1992-07-16 | 2009-10-22 | [
"hep-th"
] | A. Carlini, A. Treves, F. Fucito and M. Martellini |
hep-th/9207056 | Einstein manifolds in Ashtekar variables: explicit examples | We show that all solutions to the vacuum Einstein field equations may be
mapped to instanton configurations of the Ashtekar variables. These solutions
are characterized by properties of the moduli space of the instantons. We
exhibit explicit forms of these configurations for several well-known
solutions, and indicate a... | 1992-07-16 | 2008-02-03 | [
"hep-th",
"gr-qc"
] | Lay Nam Chang, Chopin Soo |
hep-th/9207061 | Connection between the Affine and Conformal Affine Toda Models and their
Hirota's Solution | It is shown that the Affine Toda models (AT) constitute a ``gauge fixed''
version of the Conformal Affine Toda model (CAT). This result enables one to
map every solution of the AT models into an infinite number of solutions of the
corresponding CAT models, each one associated to a point of the orbit of the
conformal gr... | 1992-07-16 | 2009-07-28 | [
"hep-th"
] | C.P.Constantinidis, L.A. Ferreira, J.F. Gomes and A.H. Zimerman |
hep-th/9207054 | Quantum Field Theory in Spaces with Closed Time-Like Curves | Gott spacetime has closed timelike curves, but no locally anomalous
stress-energy. A complete orthonormal set of eigenfunctions of the wave
operator is found in the special case of a spacetime in which the total deficit
angle is $2\pi$. A scalar quantum field theory is constructed using these
eigenfunctions. The result... | 1992-07-15 | 2009-10-22 | [
"hep-th",
"gr-qc"
] | David G. Boulware |
hep-th/9207055 | Vortex condensation in a model of random $\phi^{4}$-graphs | We consider a soluble model of large $\phi^{4}$-graphs randomly embedded in
one compactified dimension; namely the large-order behaviour of
finite-temperature perturbation theory for the partition function of the
anharmonic oscillator. We solve the model using semi-classical methods and
demonstrate the existence of a c... | 1992-07-15 | 2009-10-22 | [
"hep-th"
] | N. Dorey and P. S. Kurzepa |
hep-th/9207053 | Electric Magnetic Duality in String Theory | The electric-magnetic duality transformation in four dimensional heterotic
string theory discussed by Shapere, Trivedi and Wilczek is shown to be an exact
symmetry of the equations of motion of low energy effective field theory even
after including the scalar and the vector fields, arising due to
compactification, in t... | 1992-07-15 | 2009-09-15 | [
"hep-th"
] | Ashoke Sen |
hep-th/9207057 | Inonu-Wigner Contractions of Kac-Moody Algebras | We discuss In\"on\"u-Wigner contractions of affine Kac-Moody algebras. We
show that the Sugawara construction for the contracted affine algebra exists
only for a fixed value of the level $k$, which is determined in terms of the
dimension of the uncontracted part of the starting Lie algebra, and the
quadratic Casimir in... | 1992-07-15 | 2009-10-22 | [
"hep-th"
] | Parthasarathi Majumdar |
hep-th/9207045 | Problems of Naturalness: Some Lessons from String Theory | We consider some questions of naturalness which arise when one considers
conventional field theories in the presence of gravitation: the problem of
global symmetries, the strong CP problem, and the cosmological constant
problem. Using string theory as a model, we argue that it is reasonable to
postulate weakly broken g... | 1992-07-14 | 2008-02-03 | [
"hep-th",
"hep-ph"
] | Michael Dine |
hep-th/9207051 | Loop Variables and the Virasoro Group | We derive an expression in closed form for the action of a finite element of
the Virasoro Group on generalized vertex operators. This complements earlier
results giving an algorithm to compute the action of a finite string of
generators of the Virasoro Algebra on generalized vertex operators. The main
new idea is to us... | 1992-07-14 | 2009-10-22 | [
"hep-th"
] | B. Sathiapalan |
hep-th/9207046 | One-Loop Renormalization in Two-Dimensional Matter-Dilaton Quantum
Gravity and Charged Black Holes | The quantum properties of two-dimensional matter-dilaton gravity
---which includes a large family of actions for two-dimensional gravity (in
particular, string-inspired models)--- are investigated. The one-loop
divergences in linear covariant gauges are calculated and the structure of the
one-loop renormalization is ... | 1992-07-14 | 2009-09-17 | [
"hep-th"
] | E. Elizalde and S.D. Odintsov |
hep-th/9207052 | Solution of the Master Equation in Terms of the Odd Time Formulation | A systematic way of formulating the Batalin-Vilkovisky method of quantization
was obtained in terms of the ``odd time'' formulation. We show that in a class
of gauge theories it is possible to find an ``odd time lagrangian'' yielding,
by a Legendre transformation, an ``odd time hamiltonian'' which is the minimal
soluti... | 1992-07-14 | 2007-05-23 | [
"hep-th"
] | O.F.Dayi |
hep-th/9207048 | $\bf W_\infty$ Gravity - a Geometric Approach | A brief review is given of an adaptation of the coadjoint orbit method
appropriate for study of models with infinite-dimensional symmetry groups. It
is illustrated on several examples, including derivation of the WZNW action of
induced $D=2\,$ $(N,0)\,$ supergravity. As a main application, we present the
geometric acti... | 1992-07-14 | 2009-10-22 | [
"hep-th"
] | Emil Nissimov and Svetlana Pacheva |
hep-th/9207047 | Schrodinger Equation for Particle with Friction | A new quantum mechanical wave equation describing a particle with frictional
forces is derived. It depends on a parameter $\alpha$ whose range is determined
by the coefficient of friction $\gamma$, that is, $0 \leq \alpha \leq \gamma$.
For one extreme value of this parameter, $\alpha = 0$, we recover Kostin's
equation.... | 1992-07-14 | 2009-10-22 | [
"hep-th"
] | Alexios P. Polychronakos and Rodanthy Tzani |
hep-th/9207049 | Higher Twisted Sector Couplings of $Z_N$ Orbifolds | We derive the basic correlation functions of twist fields coming from
arbitrary twisted sectors in symmetric $Z_N$ orbifold conformal field theories,
keeping all the admissible marginal perturbations, in particular those
corresponding to the antisymmetric tensor background field. This allows a
thorough investigation of... | 1992-07-14 | 2009-10-22 | [
"hep-th"
] | J. Erler, D. Jungnickel, M. Spalinski and S. Stieberger |
hep-th/9207050 | A twistor formulation of the heterotic D=10 superstring with manifest
(8,0) worldsheet supersymmetry | We propose a new formulation of the heterotic $D=10$ Green-Schwarz
superstring whose worldsheet is a superspace with two even and eight odd
coordinates. The action is manifestly invariant under both target-space
supersymmetry and a worldsheet reparametrisation supergroup. It contains only a
finite set of auxiliary fiel... | 1992-07-14 | 2011-05-05 | [
"hep-th"
] | F. Delduc, A. Galperin, P. Howe and E. Sokatchev |
hep-th/9207040 | Dynkin TBA's | We prove a useful identity valid for all $ADE$ minimal S-matrices, that
clarifies the transformation of the relative thermodynamic Bethe Ansatz (TBA)
from its standard form into the universal one proposed by Al.B.Zamolodchikov.
By considering the graph encoding of the system of functional equations for the
exponentials... | 1992-07-13 | 2009-10-22 | [
"hep-th"
] | F.Ravanini, R.Tateo and A.Valleriani |
hep-th/9207036 | Finite Euler Hierarchies And Integrable Universal Equations | Recent work on Euler hierarchies of field theory Lagrangians iteratively
constructed {}from their successive equations of motion is briefly reviewed. On
the one hand, a certain triality structure is described, relating arbitrary
field theories, {\it classical\ts} topological field theories -- whose
classical solutions ... | 1992-07-13 | 2009-10-22 | [
"hep-th"
] | Jan Govaerts |
hep-th/9207037 | Gott Time Machines Cannot Exist in an Open (2+1)-Dimensional Universe
With Timelike Total Momentum | We prove the title. | 1992-07-13 | 2008-02-03 | [
"hep-th",
"gr-qc",
"hep-ph"
] | Sean M. Carroll, Edward Farhi, and Alan H. Guth |
hep-th/9207042 | Self-Dual Supersymmetry and Supergravity in Atiyah-Ward Space-Time | We study supersymmetry and self-duality in a four-dimensional space-time with
the signature (2,2), that we call the Atiyah-Ward space-time. Dirac matrices
and spinors, in particular Majorana-Weyl spinors, are investigated in detail.
We formulate $ N\ge 1 $ supersymmetric self-dual Yang-Mills theories and
self-dual supe... | 1992-07-13 | 2012-08-27 | [
"hep-th"
] | Sergei V. Ketov, Hitoshi Nishino and S. James Gates, Jr |
hep-th/9207041 | Link Invariants of Finite Type and Perturbation Theory | The Vassiliev-Gusarov link invariants of finite type are known to be closely
related to perturbation theory for Chern-Simons theory. In order to clarify the
perturbative nature of such link invariants, we introduce an algebra V_infinity
containing elements g_i satisfying the usual braid group relations and elements
a_i... | 1992-07-13 | 2009-10-22 | [
"hep-th",
"math.QA"
] | John C. Baez |
hep-th/9207044 | Operator content and modular property of Chern-Simons coupled to a
massless scalar | Corrected with some rewording | 1992-07-13 | 2008-02-03 | [
"hep-th",
"cond-mat"
] | Wei Chen and Miao Li |
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