text stringlengths 89 2.49k | category stringclasses 19
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Iterative Non-iterative Integrals in Quantum Field Theory: Single scale Feynman integrals in quantum field theories obey difference or
differential equations with respect to their discrete parameter $N$ or
continuous parameter $x$. The analysis of these equations reveals to which
order they factorize, which can be diff... | hep-th |
Black Hole Condensation and Duality in String Theory: This is a non-technical version of a talk presented at the conference,
"S-Duality and Mirror Symmetry in String Theory" Trieste, June, 1996 which will
appear in the proceedings. | hep-th |
Non-gravitational exceptional supermultiplets: We examine non-gravitational minimal supermultiplets which are based on the
tensor gauge fields appearing as matter fields in exceptional generalised
geometry. When possible, off-shell multiplets are given. The fields in the
multiplets describe non-gravitational parts of t... | hep-th |
Spin-Statistics Correlations in Various Noncommutative Field Theories: In this thesis we study field theories written on a particular model of
noncommutative spacetime, the Groenewold-Moyal (GM) plane. We start with
briefly reviewing the novel features of field theories on GM plane e.g. the
$\ast$-product, restoration ... | hep-th |
Thermodynamics of Rotating Black Branes in Gauss-Bonnet-nonlinear
Maxwell Gravity: We consider the Gauss-Bonnet gravity in the presence of a new class of
nonlinear electromagnetic field, namely, power Maxwell invariant. By use of a
suitable transformation, we obtain a class of real rotating solutions with $k$
rotatio... | hep-th |
Reply to `Can infrared gravitons screen $Λ$?': We reply to the recent criticism by Garriga and Tanaka of our proposal that
quantum gravitational loop corrections may lead to a secular screening of the
effective cosmological constant. Their argument rests upon a renormalization
scheme in which the composite operator $(R... | hep-th |
Topological Sigma Models with H-Flux: We investigate the topological theory obtained by twisting the N=(2,2)
supersymmetric nonlinear sigma model with target a bihermitian space with
torsion. For the special case in which the two complex structures commute, we
show that the action is a Q-exact term plus a quasi-topolog... | hep-th |
Supertwistor formulation for higher dimensional superstrings: Considered is the formulation for the superstring action in 6 and 10
dimensions involving supertwistor variables that appropriately generalize
4-dimensional Ferber supertwistors. Equations of motion and kappa-symmetry
transformations in terms of the supertwi... | hep-th |
Supersymmetric gauge theory and the Yangian: This paper develops a new connection between supersymmetric gauge theories
and the Yangian. I show that a twisted, deformed version of the pure N=1
supersymmetric gauge theory is controlled by the Yangian, in the same way that
Chern-Simons theory is controlled by the quantum... | hep-th |
Perturbations of General Relativity to All Orders and the General
$n^{\rm th}$ Order Terms: We derive all-order expressions for perturbations of the Einstein-Hilbert
action and the Einstein equation with the general $n$-th order terms. To this
end, we employ Cheung and Remmen's perturbation conventions both in tensor... | hep-th |
A New Perspective on DGP Gravity: We examine brane induced gravity on codimension-1 branes, a.k.a DGP gravity,
as a theory of five-dimensional gravity containing a certain class
four-dimensional branes. From this perspective, the model suffers from a number
of pathologies which went unnoticed before. By generalizing th... | hep-th |
Instantons, Monopoles and Toric HyperKaehler Manifolds: In this paper, the metric on the moduli space of the k=1 SU(n) periodic
instanton -or caloron- with arbitrary gauge holonomy at spatial infinity is
explicitly constructed. The metric is toric hyperKaehler and of the form
conjectured by Lee and Yi. The torus coordi... | hep-th |
Energy-momentum tensor of bouncing gravitons: In models of the Universe with extra dimensions gravity propagates in the
whole space-time. Graviton production by matter on the brane is significant in
the early hot Universe. In a model of 3-brane with matter embedded in 5D
space-time conditions for gravitons emitted from... | hep-th |
Quantization of the anisotropic conformal Horava theory: We perform the Batalin-Fradkin-Vilkovisky quantization of the anisotropic
conformal Horava theory in d spatial dimensions. We introduce a model with a
conformal potential suitable for any dimension. We define an anisotropic and
local gauge-fixing condition that a... | hep-th |
Finite Tensor Deformations of Supergravity Solitons: We consider brane solutions where the tensor degrees of freedom are excited.
Explicit solutions to the full non-linear supergravity equations of motion are
given for the M5 and D3 branes, corresponding to finite selfdual tensor or
Born-Infeld field strengths. The sol... | hep-th |
Nonperturbative black hole entropy and Kloosterman sums: Non-perturbative quantum corrections to supersymmetric black hole entropy
often involve nontrivial number-theoretic phases called Kloosterman sums. We
show how these sums can be obtained naturally from the functional integral of
supergravity in asymptotically AdS... | hep-th |
Sommerfeld effect as the vertex correction in three-dimensional space: It is shown that the correction to the vertex for fermion pair annihilation
and production in the low-energy region is equal to the value of the wave
function for the two-body system at the origin. The procedure also shows
directly that the emergenc... | hep-th |
Matching the circular Wilson loop with dual open string solution at
1-loop in strong coupling: We compute the 1-loop correction to the effective action for the string
solution in AdS_5 x S^5 dual to the circular Wilson loop. More generically, the
method we use can be applied whenever the two dimensional spectral prob... | hep-th |
Boundary Effects in Quantum Physics: We analyze the role of boundaries in the infrared behavior of quantum field
theories. By means of a novel method we calculate the vacuum energy for a
massless scalar field confined between two homogeneous parallel plates with the
most general type of boundary properties. This allows... | hep-th |
Vibrational modes of Q-balls: We study linear perturbations of classically stable Q-balls in theories
admitting analytic solutions. Although the corresponding boundary value problem
is non-Hermitian, the analysis of perturbations can also be performed
analytically in certain regimes. We show that in theories with the f... | hep-th |
Exploring the Abelian 4D, $\mathcal{N}$ = 4 Vector-Tensor Supermultiplet
and Its Off-Shell Central Charge Structure: An abelian 4D, $\mathcal{N}$ = 4 vector supermultiplet allows for a duality
transformation to be applied to one of its spin-0 states. The resulting theory
can be described as an abelian 4D, $\mathcal{N... | hep-th |
One-Loop N-Point Superstring Amplitudes with Manifest d=4 Supersymmetry: The hybrid formalism for the superstring is used to compute one-loop
amplitudes with an arbitrary number of external d=4 supergravity states. These
one-loop N-point amplitudes are expressed as Koba-Nielsen-like formulas with
manifest d=4 supersymm... | hep-th |
Symmetries of post-Galilean expansions: In this letter we study an infinite extension of the Galilei symmetry group
in any dimension that can be thought of as a non-relativistic or post-Galilean
expansion of the Poincare symmetry. We find an infinite-dimensional vector
space on which this generalized Galilei group acts... | hep-th |
On quantum corrections to geodesics in de-Sitter spacetime: We find a coordinate-independent wave-packet solution of the massive
Klein-Gordon equation with the conformal coupling to gravity in the de-Sitter
universe. This solution can locally be represented through the superposition of
positive-frequency plane waves at... | hep-th |
Trouble Finding the Optimal AdS/QCD: In the bottom-up approach to AdS/QCD based on a five-dimensional gravity
dilaton action the exponential of the dilaton field is usually identified as
the strong or 't Hooft coupling. There is currently no model known which fits
the measurements of the running coupling and lattice re... | hep-th |
Chiral Symmetry Breaking in the $d=3$ Nambu-Jona-Lasinio Model in Curved
Spacetime: The phase structure of the $d=3$ Nambu-Jona-Lasinio model in curved spacetime
is considered to leading order in the $1/N$--expansion and in the linear
curvature approximation. The possibility of a curvature-induced first-order
phase t... | hep-th |
Symplectic Fermions: We study two-dimensional conformal field theories generated from a
``symplectic fermion'' - a free two-component fermion field of spin one - and
construct the maximal local supersymmetric conformal field theory generated
from it. This theory has central charge c=-2 and provides the simplest example... | hep-th |
Dual gravity and E11: We consider the equation of motion in the gravity sector that arises from the
non-linear realisation of the semi-direct product of E11 and its first
fundamental representation, denoted by l1, in four dimensions. This equation is
first order in derivatives and at low levels relates the usual field ... | hep-th |
Anomaly inflow and RR anomalous couplings: We review the anomaly inflow mechanism on D-branes and O-planes. In
particular, we compute the one-loop world-volume anomalies and derive the RR
anomalous couplings required for their cancellation. | hep-th |
A general holographic insulator/superconductor model away from the probe
limit: We investigate holographic phase transitions affected by dark matter sector
in the AdS soliton background away from the probe limit. When neglecting
backreaction, the scalar charge q can be scaled unity without loss of
generality. While c... | hep-th |
Black hole entropy and the renormalization group: Four decades after its first postulation by Bekenstein, black hole entropy
remains mysterious. It has long been suggested that the entanglement entropy of
quantum fields on the black hole gravitational background should represent at
least an important contribution to th... | hep-th |
Odd Chern-Simons Theory, Lie Algebra Cohomology and Characteristic
Classes: We investigate the generic 3D topological field theory within AKSZ-BV
framework. We use the Batalin-Vilkovisky (BV) formalism to construct explicitly
cocycles of the Lie algebra of formal Hamiltonian vector fields and we argue
that the pertur... | hep-th |
On algebraic structures in supersymmetric principal chiral model: Using the Poisson current algebra of the supersymmetric principal chiral
model, we develop the algebraic canonical structure of the model by evaluating
the fundamental Poisson bracket of the Lax matrices that fits into the rs
matrix formalism of non-ultr... | hep-th |
The simplest non-associative generalization of supersymmetry: Nonassociative generalization of supersymmetry is suggested. 3- and 4-point
associators for supersymmetric generators are considered. On the basis of zero
Jacobiators for three supersymmetric generators, we have obtained the simplest
form of 3-point associat... | hep-th |
Probing the Constituent Structure of Black Holes: Based on recent ideas, we propose a framework for the description of black
holes in terms of constituent graviton degrees of freedom. Within this
formalism a large black hole can be understood as a bound state of N
longitudinal gravitons. In this context black holes are... | hep-th |
Universality of anomalous conductivities in theories with
higher-derivative holographic duals: Anomalous chiral conductivities in theories with global anomalies are
independent of whether they are computed in a weakly coupled quantum (or
thermal) field theory, hydrodynamics, or at infinite coupling from holography.
W... | hep-th |
Maximally Supersymmetric Yang-Mills in five dimensions in light-cone
superspace: We formulate maximally supersymmetric Yang-Mills theory in five dimensions in
light-cone superspace. The light-cone Hamiltonian is of the quadratic form and
the theory can be understood as an oxidation of the N=4 Super Yang-Mills Theory
... | hep-th |
Weyl Card Diagrams: To capture important physical properties of a spacetime we construct a new
diagram, the card diagram, which accurately draws generalized Weyl spacetimes
in arbitrary dimensions by encoding their global spacetime structure,
singularities, horizons, and some aspects of causal structure including null
... | hep-th |
Universal horizons in maximally symmetric spaces: Universal horizons in Ho\v{r}ava-Lifshitz gravity and Einstein-{\ae}ther
theory are the equivalent of causal horizons in general relativity and appear
to have many of the same properties, including a first law of horizon
thermodynamics and thermal radiation. Since unive... | hep-th |
On the Natural Gauge Fields of Manifolds: The gauge symmetry inherent in the concept of manifold has been discussed.
Within the scope of this symmetry the linear connection or displacement field
can be considered as a natural gauge field on the manifold. The gauge invariant
equations for the displacement field have bee... | hep-th |
Twisted topological structures related to M-branes II: Twisted Wu and
Wu^c structures: Studying the topological aspects of M-branes in M-theory leads to various
structures related to Wu classes. First we interpret Wu classes themselves as
twisted classes and then define twisted notions of Wu structures. These
general... | hep-th |
The complete one-loop spin chain for N=2 Super-Yang-Mills: We show that the complete planar one-loop mixing matrix of the N=2 Super
Yang--Mills theory can be obtained from a reduction of that of the N=4 theory.
For composite operators of scalar fields, this yields an anisotropic XXZ spin
chain, whose spectrum of excita... | hep-th |
The Family Problem: Hints from Heterotic Line Bundle Models: Within the class of heterotic line bundle models, we argue that N=1 vacua
which lead to a small number of low-energy chiral families are preferred. By
imposing an upper limit on the volume of the internal manifold, as required in
order to obtain finite values... | hep-th |
From Fusion Hierarchy to Excited State TBA: Functional relations among the fusion hierarchy of quantum transfer matrices
give a novel derivation of the TBA equations, namely without string hypothesis.
This is demonstrated for two important models of 1D highly correlated electron
systems, the supersymmetric $t-J$ model ... | hep-th |
Hemisphere Partition Function and Analytic Continuation to the Conifold
Point: We show that the hemisphere partition function for certain U(1) gauged linear
sigma models (GLSMs) with D-branes is related to a particular set of
Mellin-Barnes integrals which can be used for analytic continuation to the
singular point in... | hep-th |
A solution of 2D QCD at Finite $N$ using a conformal basis: We study 2D QCD with a fundamental fermion at small-$N$ using the recently
proposed conformal basis approach. We find that effective conformal dominance
still holds, namely that the spectrum converges efficiently, with high
scaling-dimension operators decoupli... | hep-th |
Z_2 x Z_2 Heterotic Orbifold Models of Non Factorisable Six Dimensional
Toroidal Manifolds: We discuss heterotic strings on Z_2 x Z_2 orbifolds of non factorisable
six-tori. Although the number of fixed tori is reduced as compared to the
factorisable case, Wilson lines are still needed for the construction of three
g... | hep-th |
The SAGEX Review on Scattering Amplitudes, Chapter 11: Soft Theorems and
Celestial Amplitudes: The soft limits of scattering amplitudes have been extensively studied due to
their essential role in the computation of physical observables in collider
physics. The universal factorisation that occurs in these kinematic l... | hep-th |
Feynman rules for Coulomb gauge QCD: The Coulomb gauge in nonabelian gauge theories is attractive in principle,
but beset with technical difficulties in perturbation theory. In addition to
ordinary Feynman integrals, there are, at 2-loop order, Christ-Lee (CL) terms,
derived either by correctly ordering the operators i... | hep-th |
The evolution of the universe from noncompact Kaluza-Klein theory: We develope a 5D mechanism inspired in the Campbell's theorem, to explain the
(neutral scalar field governed) evolution of the universe from a initially
inflationary expansion that has a change of phase towards a decelerated
expansion and thereinafter e... | hep-th |
Magnetic-field-driven topological phase transition in the holograpic
Weyl semimetal: We study the magnetic field effects on the quantum critical point (QCP) in
the holographic Weyl semimetal model. We show that it increases quadratically
with the magnetic field for weak field and linear with the magnetic field for
st... | hep-th |
Runaway directions in O'Raifeartaigh models: R-symmetries, which are needed for supersymmetry (SUSY) breaking in
O'Raifeartaigh models, often lead to SUSY runaway directions trough a
complexified R-transformation. Non-R symmetries also lead to runaway directions
in a similar way. This work investigates the occurrence o... | hep-th |
The Static Gauge Potential with a Cutoff: The static potential, corresponding to the interaction of two heavy sources
is computed for $\mathcal{N}=4$ Super Yang Mills in the strong 't Hooft
coupling regime by using the AdS/CFT conjecture and performing a computation of
a rectangular Wilson loop at a finite distance of ... | hep-th |
RG limit cycles: In this review we consider the concept of limit cycles in the renormalization
group flows. The examples of this phenomena in the quantum mechanics and field
theory will be presented. | hep-th |
Operator Product Expansion in Logarithmic Conformal Field Theory: In logarithmic conformal field theory, primary fields come together with
logarithmic partner fields on which the stress-energy tensor acts
non-diagonally. Exploiting this fact and global conformal invariance of two-
and three-point functions, operator pr... | hep-th |
Singularities and Gauge Theory Phases: Motivated by M-theory compactification on elliptic Calabi-Yau threefolds, we
present a correspondence between networks of small resolutions for singular
elliptic fibrations and Coulomb branches of five-dimensional N=1 gauge
theories. While resolutions correspond to subchambers of ... | hep-th |
Toward the End of Time: The null-brane space-time provides a simple model of a big crunch/big bang
singularity. A non-perturbative definition of M-theory on this space-time was
recently provided using matrix theory. We derive the fermion couplings for this
matrix model and study the leading quantum effects. These effec... | hep-th |
Decoupling of High Dimension Operators from the Low Energy Sector in
Holographic Models: We study the decoupling of high dimension operators from the the description
of the low-energy spectrum in theories where conformal symmetry is broken by a
single scale, which we refer to as `broken CFTs'. Holographic duality sug... | hep-th |
Nonlocal vertices and analyticity: Landau equations and general Cutkosky
rule: We study the analyticity properties of amplitudes in theories with nonlocal
vertices of the type occurring in string field theory and a wide class of
nonlocal field theory models. Such vertices are given in momentum space by
entire functio... | hep-th |
Quantum Cauchy problem in cosmology: We develop a general framework for effective equations of expectation values
in quantum cosmology and pose for them the quantum Cauchy problem with
no-boundary and tunneling wavefunctions. We apply this framework in the model
with a big negative non-minimal coupling, which incorpora... | hep-th |
Infrared Modification of Gravity: In this lecture I address the issue of possible large distance modification
of gravity and its observational consequences. Although, for the illustrative
purposes we focus on a particular simple generally-covariant example, our
conclusions are rather general and apply to large class of... | hep-th |
Double Field Theory at SL(2) angles: An extended field theory is presented that captures the full SL(2) x O(6,6+n)
duality group of four-dimensional half-maximal supergravities. The theory has
section constraints whose two inequivalent solutions correspond to minimal D=10
supergravity and chiral half-maximal D=6 superg... | hep-th |
Functional quantization of Generalized Scalar Duffin-Kemmer-Petiau
Electrodynamics: The main goal of this work is to study systematically the quantum aspects of
the interaction between scalar particles in the framework of Generalized Scalar
Duffin-Kemmer-Petiau Electrodynamics (GSDKP). For this purpose the theory is
... | hep-th |
M2-doughnuts: We present a family of new M2-brane solutions in $AdS_7\times S^4$ that
calculate toroidal BPS surface operators in the $\mathcal{N}=(2,0)$ theory.
These observables are conformally invariant and not subject to anomalies so we
are able to evaluate their finite expectation values at leading order at large
... | hep-th |
An Etude on Global Vacuum Energy Sequester: Recently two of the authors proposed a mechanism of vacuum energy sequester
as a means of protecting the observable cosmological constant from quantum
radiative corrections. The original proposal was based on using global Lagrange
multipliers, but later a local formulation wa... | hep-th |
Argyres-Douglas Theories, S^1 Reductions, and Topological Symmetries: In a recent paper, we proposed closed-form expressions for the superconformal
indices of the (A_1, A_{2n-3}) and (A_1, D_{2n}) Argyres-Douglas (AD)
superconformal field theories (SCFTs) in the Schur limit. Following up on our
results, we turn our att... | hep-th |
Lectures on nonlinear sigma-models in projective superspace: N = 2 supersymmetry in four space-time dimensions is intimately related to
hyperkahler and quaternionic Kahler geometries. On one hand, the target spaces
for rigid supersymmetric sigma-models are necessarily hyperkahler manifolds. On
the other hand, when coup... | hep-th |
Two-Dimensional Chiral Matrix Models and String Theories: We formulate and solve a class of two-dimensional matrix gauge models
describing ensembles of non-folding surfaces covering an oriented, discretized,
two-dimensional manifold. We interpret the models as string theories
characterized by a set of coupling constant... | hep-th |
Existence of a Supersymmetric Massless Ground State of the $SU(N)$
Matrix Model globally on its Valleys: In this work we consider the existence and uniqueness of the ground state of
the regularized Hamiltonian of the Supermembrane in dimensions $D= 4,\,5,\,7$
and 11, or equivalently the $SU(N)$ Matrix Model. That is,... | hep-th |
Time Dependent Cosmologies and Their Duals: We construct a family of solutions in IIB supergravity theory. These are time
dependent or depend on a light-like coordinate and can be thought of as
deformations of AdS_5 x S^5. Several of the solutions have singularities. The
light-like solutions preserve 8 supersymmetries.... | hep-th |
Entanglement between two disjoint universes: We use the replica method to compute the entanglement entropy of a universe
without gravity entangled in a thermofield-double-like state with a disjoint
gravitating universe. Including wormholes between replicas of the latter gives
an entropy functional which includes an "is... | hep-th |
Charged Rotating Black Holes in Five Dimensional U(1)^3 Gauged N=2
Supergravity: We obtain the general solution for non-extremal 3-charge dilatonic rotating
black holes in the U(1)^3 gauged five-dimensional N=2 supergravity coupled to
two vector multiplets, in the case where the two rotation parameters are set
equal.... | hep-th |
A Quantum Framework for AdS/dCFT through Fuzzy Spherical Harmonics on
$S^4$: We consider a non-supersymmetric domain-wall version of $\mathcal{N} = 4$ SYM
theory where five out of the six scalar fields have non-zero classical values
on one side of a wall of codimension one. The classical fields have commutators
which... | hep-th |
Mass, Entropy and Holography in Asymptotically de Sitter Spaces: We propose a novel prescription for computing the boundary stress tensor and
charges of asymptotically de Sitter (dS) spacetimes from data at early or late
time infinity. If there is a holographic dual to dS spaces, defined analogously
to the AdS/CFT corr... | hep-th |
Boundary form factors in the Smirnov--Fateev model with a diagonal
boundary $S$ matrix: The boundary conditions with diagonal boundary $S$ matrix and the boundary
form factors for the Smirnov--Fateev model on a half line has been considered
in the framework of the free field representation. In contrast to the case of... | hep-th |
One-loop corrections in Maxwell-metric-affine bumblebee gravity: In this paper, we consider the coupling of the metric-affine bumblebee
gravity to the Abelian gauge field and obtain the effective model corresponding
to the weak gravity limit of this theory. The effective bumblebee theory
displays new unconventional cou... | hep-th |
$\mathcal{N}=2$ consistent truncations from wrapped M5-branes: We discuss consistent truncations of eleven-dimensional supergravity on a
six-dimensional manifold $M$, preserving minimal $\mathcal{N}=2$ supersymmetry
in five dimensions. These are based on $G_S \subseteq USp(6)$ structures for
the generalised $E_{6(6)}$ ... | hep-th |
Holographic Formulation of Quantum Supergravity: We show that ${\cal N}=1$ supergravity with a cosmological constant can be
expressed as constrained topological field theory based on the supergroup
$Osp(1|4)$. The theory is then extended to include timelike boundaries with
finite spatial area. Consistent boundary condi... | hep-th |
The c and a-theorems and the Local Renormalisation Group: The Zamolodchikov c-theorem has led to important new insights in our
understanding of the renormalisation group and the geometry of the space of
QFTs. Here, we review the parallel developments of the search for a
higher-dimensional generalisation of the c-theore... | hep-th |
't Hooft lines of ADE-type and Topological Quivers: We investigate 4D Chern-Simons theory with ADE gauge symmetries in the
presence of interacting Wilson and 't Hooft line defects. We analyse the
intrinsic properties of these lines' coupling and explicate the building of
oscillator-type Lax matrices verifying the RLL i... | hep-th |
Chiral Four-Dimensional Heterotic Covariant Lattices: In the covariant lattice formalism, chiral four-dimensional heterotic string
vacua are obtained from certain even self-dual lattices which completely
decompose into a left-mover and a right-mover lattice. The main purpose of this
work is to classify all right-mover ... | hep-th |
Evaluating Feynman Integrals Using D-modules and Tropical Geometry: Feynman integrals play a central role in the modern scattering amplitudes
research program. Advancing our methods for evaluating Feynman integrals will,
therefore, strengthen our ability to compare theoretical predictions with data
from particle accele... | hep-th |
A note on the infinite-dimensional symmetries of classical hamiltonian
systems: We show that any Hamiltonian system with one degree of freedom is invariant
under a $w_\infty$ algebra of symmetries. | hep-th |
Chiral Anomaly in Euler Fluid and Beltrami Flow: We show that the chiral anomaly of quantum field theories with Dirac fermions
subject to an axial background field is an inherent property of kinematics of a
perfect classical fluid. Celebrated Beltrami flows (stationary solutions of
Euler equations with extensive helici... | hep-th |
High spin baryon in hot strongly coupled plasma: We consider a strings-junction holographic model of probe baryon in the
finite-temperature supersymmetric Yang-Mills dual of the AdS-Schwarzschild
black hole background. In particular, we investigate the screening length for
high spin baryon composed of rotating N_c heav... | hep-th |
Quantization of models with non-compact quantum group symmetry. Modular
XXZ magnet and lattice sinh-Gordon model: We define and study certain integrable lattice models with non-compact
quantum group symmetry (the modular double of U_q(sl_2)) including an
integrable lattice regularization of the sinh-Gordon model and ... | hep-th |
All Two-Loop MHV Amplitudes in Multi-Regge Kinematics From Applied
Symbology: Recent progress on scattering amplitudes has benefited from the mathematical
technology of symbols for efficiently handling the types of polylogarithm
functions which frequently appear in multi-loop computations. The symbol for
all two-loop... | hep-th |
Superconnection in the spin factor approach to particle physics: The notion of superconnection devised by Quillen in 1985 and used in
gauge-Higgs field theory in the 1990's is applied to the spin factors
(finite-dimensional euclidean Jordan algebras) recently considered as
representing the finite quantum geometry of on... | hep-th |
Algebraic Geometry Approach in Theories with Extra Dimensions I.
Application of Lobachevsky Geometry: This present paper has the purpose to find certain physical appications of
Lobachevsky geometry and of the algebraic geometry approach in theories with
extra dimensions. It has been shown how the periodic properties ... | hep-th |
Aspects of superconformal field theories in six dimensions: We introduce the analytic superspace formalism for six-dimensional $(N,0)$
superconformal field theories. Concentrating on the $(2,0)$ theory we write
down the Ward identities for correlation functions in the theory and show how
to solve them. We then consider... | hep-th |
Summability of Superstring Theory: Several arguments are given for the summability of the superstring
perturbation series. Whereas the Schottky group coordinatization of moduli
space may be used to provide refined estimates of large-order bosonic string
amplitudes, the super-Schottky group variables define a measure fo... | hep-th |
No-dipole-hair theorem for higher-dimensional static black holes: We prove that static black holes in n-dimensional asymptotically flat
spacetime cannot support non-trivial electric p-form field strengths when
(n+1)/2<= p <= n-1. This implies in particular that static black holes cannot
possess dipole hair under these ... | hep-th |
Solvable limit of ETH matrix model for double-scaled SYK: We study the two-matrix model for double-scaled SYK model, called ETH matrix
model introduced by Jafferis et al [arXiv:2209.02131]. If we set the parameters
$q_A,q_B$ of this model to zero, the potential of this two-matrix model is
given by the Gaussian terms an... | hep-th |
An Attempt to Remove Quadratic Divergences in the Standard Theory: The quadratic divergences caused by Yukawa interactions in the standard
theory of elementary particle physics is shown to be removed by introducing
finite-mass complex-ghost regulator fields. In this modification of the
standard theory, its manifest cov... | hep-th |
Orientifold Planes, Type I Wilson Lines and Non-BPS D-branes: There is a longstanding puzzle concerned with the existence of Op~-planes
with p>=6, which are orientifold p-planes of negative charge with stuck
Dp-branes. We study the consistency of configurations with various orientifold
planes and propose a resolution t... | hep-th |
2d (0,2) Quiver Gauge Theories and D-Branes: We initiate a systematic study of 2d (0,2) quiver gauge theories on the
worldvolume of D1-branes probing singular toric Calabi-Yau 4-folds. We present
an algorithm for efficiently calculating the classical mesonic moduli spaces of
these theories, which correspond to the prob... | hep-th |
Scale Vs. Conformal Invariance in the AdS/CFT Correspondence: We present two examples of non-trivial field theories which are scale
invariant, but not conformally invariant. This is done by placing certain field
theories, which are conformally invariant in flat space, onto curved
backgrounds of a specific type. We defi... | hep-th |
New Exactly Solvable Two-Dimensional Quantum Model Not Amenable to
Separation of Variables: The supersymmetric intertwining relations with second order supercharges
allow to investigate new two-dimensional model which is not amenable to
standard separation of variables. The corresponding potential being the
two-dimen... | hep-th |
Possible Lorentz symmetry violation from broken Weyl invariance: In this work, we investigate a theory of linear Weyl gravity coupled to a
scalar field and study the scenario in which Lorentz symmetry is broken by a
non-vanishing vacuum expectation value of the Weyl field in the flat space
limit after Weyl symmetry bre... | hep-th |
Soldering Chiralities II: Non-Abelian Case: We study the non-abelian extension of the soldering process of two chiral WZW
models of opposite chiralities, resulting in a (non-chiral) WZW model living in
a 2D space-time with non trivial Riemanian curvature. | hep-th |
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