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An Alternative Perturbative Expansion in Quantum Mechanics. Scaling and
cut-off Resummation: An alternative perturbative expansion in quantum mechanics which allows a
full expression of the scaling arbitrariness is introduced. This expansion is
examined in the case of the anharmonic oscillator and is conveniently res... | hep-th |
Particle scattering and vacuum instability by exponential steps: Particle scattering and vacuum instability in a constant inhomogeneous
electric field of particular peak configuration that consists of two
(exponentially increasing and exponentially decreasing) independent parts are
studied. It presents a new kind of ex... | hep-th |
On holography for (pseudo-)conformal cosmology: We propose a holographic dual for (pseudo-)conformal cosmological scenario,
with a scalar field that forms a moving domain wall in adS_5. The domain wall
separates two vacua with unequal energy densities. Unlike in the existing
construction, the 5d solution is regular in ... | hep-th |
Multipolar Expansions for the Relativistic N-Body Problem in the
Rest-Frame Instant Form: Dixon's multipoles for a system of N relativistic positive-energy scalar
particles are evaluated in the rest-frame instant form of dynamics. The Wigner
hyperplanes (intrinsic rest frame of the isolated system) turn out to be the... | hep-th |
The effect of different regulators in the non-local field-antifield
quantization: Recently it was shown how to regularize the Batalin-Vilkovisky (BV)
field-antifield formalism of quantization of gauge theories with the non-local
regularization (NLR) method. The objective of this work is to make an analysis
of the beh... | hep-th |
Some views on monopoles and confinement: Aspects of the monopole condensation picture of confinement are discussed.
First, the nature of the monopole singularities in the abelian projection
approach is analysed. Their apparent gauge dependence is shown to have a
natural interpretation in terms of 't~Hooft-Polyakov-like... | hep-th |
The CP(n) Model on Noncommutative Plane: We construct the consistent CP(n) model on noncommutative plane. The
Bogomolny bound on the energy is saturated by (anti-)self-dual solitons with
integer topological charge, which is independent of their scaling and
orientation. This integer quantization is satisfied for our gen... | hep-th |
Superpotential of Three Dimensional ${\cal N}=1$ Heterotic Supergravity: We dimensionally reduce the ten dimensional heterotic action on spacetimes of
the form ${\cal M}_{(2,1)}\times Y$, where ${\cal M}_{(2,1)}$ is three
dimensional maximally symmetric Anti de Sitter or Minkowski space, and $Y$ is a
compact seven dime... | hep-th |
Building Quantum Field Theories Out of Neurons: An approach to field theory is studied in which fields are comprised of $N$
constituent random neurons. Gaussian theories arise in the infinite-$N$ limit
when neurons are independently distributed, via the Central Limit Theorem,
while interactions arise due to finite-$N$ ... | hep-th |
Komar energy and Smarr formula for noncommutative Schwarzschild black
hole: We calculate the Komar energy $E$ for a noncommutative Schwarzschild black
hole. A deformation from the conventional identity $E=2ST_H$ is found in the
next to leading order computation in the noncommutative parameter $\theta$
(i.e. $\mathcal... | hep-th |
Soft Supersymmetry Breaking in Anisotropic LARGE Volume
Compactifications: We study soft supersymmetry breaking terms for anisotropic LARGE volume
compactifications, where the bulk volume is set by a fibration with one small
four-cycle and one large two-cycle. We consider scenarios where D7s wrap either
a blow-up cyc... | hep-th |
On the Lorentz Transformations of Momentum and Energy: Motivated by ultra-high-energy cosmic ray physics, we discuss all the
possible alternatives to the familiar Lorentz transformations of the momentum
and the energy of a particle. Starting from natural physical requirements, we
exclude all the possibilities, apart fr... | hep-th |
Behavior of Cosmological Perturbations in the Brane-World Mode: In this paper we present a gauge-invariant formalism for perturbations of the
brane-world model developed by the author, A. Ishibashi and O. Seto recently,
and analyze the behavior of cosmological perturbations in a spatially flat
expanding universe realiz... | hep-th |
$q$-Virasoro/W Algebra at Root of Unity and Parafermions: We demonstrate that the parafermions appear in the $r$-th root of unity limit
of $q$-Virasoro/$W_n$ algebra. The proper value of the central charge of the
coset model $ \frac{\widehat{\mathfrak{sl}}(n)_r \oplus
\widehat{\mathfrak{sl}}(n)_{m-n}}{\widehat{\mathfra... | hep-th |
Ghost wave-function renormalization in Asymptotically Safe Quantum
Gravity: Motivated by Weinberg's asymptotic safety scenario, we investigate the
gravitational renormalization group flow in the Einstein-Hilbert truncation
supplemented by the wave-function renormalization of the ghost fields. The
latter induces non-t... | hep-th |
M-Theory, Torons and Confinement: We study the decompactification limit of M-theory superpotentials for N=1
four dimensional supersymmetric gauge theories. These superpotentials can be
interpreted as generated by toron configurations. The connection with the
confinement picture in the maximal abelian gauge is discussed... | hep-th |
Recurrent dynamical symmetry breaking and restoration by Wilson lines at
finite densities on a torus: In this paper we derive the general expression of a one-loop effective
potential of the nonintegrable phases of Wilson lines for an SU(N) gauge theory
with a massless adjoint fermion defined on the spactime manifold
... | hep-th |
Higuchi Bound on Slow Roll Inflation and the Swampland: In this paper we study the implications of the generalized Higuchi bound on
massive spin-two fields for the derivative of the scalar potential within
bimetric theory. In contrast to the recent de Sitter swampland conjecture, an
upper bound on the derivate of the s... | hep-th |
Classifying BPS bosonic Wilson loops in 3d ${\cal N}=4$
Chern-Simons-matter theories: We study the possible BPS Wilson loops in three-dimensional ${\cal N}=4$
Chern-Simons-matter theory which involve only the gauge field and bilinears of
the scalars. Previously known examples are the analogues of the Gaiotto-Yin
loop... | hep-th |
Momentum in Single-trace $T\bar T$ Holography: We extend the study of 2006.13249, 2303.12422 to black strings with general
momentum, and discuss their interpretation in single-trace $T\bar T$ deformed
$CFT_2$. | hep-th |
Matrix 3-Lie superalgebras and BRST supersymmetry: Given a matrix Lie algebra one can construct the 3-Lie algebra by means of
the trace of a matrix. In the present paper we show that this approach can be
extended to the infinite-dimensional Lie algebra of vector fields on a manifold
if instead of the trace of a matrix ... | hep-th |
Strong coupling in extended Horava-Lifshitz gravity: An extension of Horava-Lifshitz gravity was recently proposed in order to
address the pathological behavior of the scalar mode all previous versions of
the theory exhibit. We show that even in this new extension the strong coupling
persists, casting doubts on whether... | hep-th |
Fedosov Deformation Quantization as a BRST Theory: The relationship is established between the Fedosov deformation quantization
of a general symplectic manifold and the BFV-BRST quantization of constrained
dynamical systems. The original symplectic manifold $\mathcal M$ is presented
as a second class constrained surfac... | hep-th |
Kerr-Bolt Black Hole Entropy and Soft Hair: Recently it has been speculated that a set of infinitesimal ${\rm
Virasoro_{\,L}}\otimes{\rm Virasoro_{\,R}}$ diffeomorphisms exist which act
non-trivially on the horizon of some black holes such as kerr and Kerr-Newman
black hole \cite{Haco:2018ske,Haco:2019ggi}. Using this ... | hep-th |
A Smooth Exit from Eternal Inflation?: The usual theory of inflation breaks down in eternal inflation. We derive a
dual description of eternal inflation in terms of a deformed Euclidean CFT
located at the threshold of eternal inflation. The partition function gives the
amplitude of different geometries of the threshold... | hep-th |
Reheating in small-field inflation on the brane: The Swampland Criteria
and observational constraints in light of the PLANCK 2018 results: We study cosmological inflation and its dynamics in the framework of the
Randall-Sundrum II brane model. In particular, we analyze in detail four
representative small-field inflat... | hep-th |
On the correspondence between the classical and quantum gravity: The relationship between the classical and quantum theories of gravity is
reexamined. The value of the gravitational potential defined with the help of
the two-particle scattering amplitudes is shown to be in disagreement with the
classical result of Gene... | hep-th |
Cosmology and the Fate of Dilatation Symmetry: We discuss the cosmological constant problem in the light of dilatation
symmetry and its possible anomaly. For dilatation symmetric quantum theories
realistic asymptotic cosmology is obtained provided the effective potential has
a non-trivial minimum. For theories with dil... | hep-th |
The Dirac operator on hypersurfaces: Odd-dimensional Riemannian spaces that are non-orientable, but have a pin
structure, require the consideration of the twisted adjoint representation of
the corresponding pin group. It is shown here how the Dirac operator should be
modified, also on even-dimensional spaces, to make i... | hep-th |
N-vaton: In general there are a large number of light scalar fields in the theories
going beyond standard model, such as string theory, and some of them can be
taken as the candidates of curvatons. For simplicity, we assume all of
curvatons have the same decay rate and suddenly decay into radiation at the
same time. In... | hep-th |
Light-front gauge invariant formulation and electromagnetic duality: The gauge invariant formulation of Maxwell's equations and the
electromagnetic duality transformations are given in the light-front (LF)
variables. The novel formulation of the LF canonical quantization, which is
based on the kinematic translation gen... | hep-th |
Stability and fluctuation modes of giant gravitons with NSNS B field: We study the stability of the giant gravitons in the string theory background
with NSNS B field. We consider the perturbation of giant gravitons formed by a
probe D$(8-p)$ brane in the background generated by D$(p-2)$-D$(p)$ branes for
$2 \le p \le 5... | hep-th |
Ground states of holographic superconductors: We investigate the ground states of the Abelian Higgs model in AdS_4 with
various choices of parameters, and with no deformations in the ultraviolet
other than a chemical potential for the electric charge under the Abelian gauge
field. For W-shaped potentials with symmetry-... | hep-th |
Little IIB Matrix Model: We study the zero-dimensional reduced model of D=6 pure super Yang-Mills
theory and argue that the large N limit describes the (2,0) Little String
Theory. The one-loop effective action shows that the force exerted between two
diagonal blocks of matrices behaves as 1/r^4, implying a six-dimensio... | hep-th |
A Coherent State Path Integral for Anyons: We derive an $su(1,1)$ coherent state path integral formula for a system of
two one-dimensional anyons in a harmonic potential. By a change of variables we
transform this integral into a coherent states path integral for a harmonic
oscillator with a shifted energy. The shift i... | hep-th |
Minkowski Conformal Blocks and the Regge Limit for SYK-like Models: We discuss scattering in a CFT via the conformal partial-wave analysis and
the Regge limit. The focus of this paper is on understanding an OPE with
Minkowski conformal blocks. Starting with a t-channel OPE, it leads to an
expansion for an s-channel sca... | hep-th |
Eikonal phase matrix, deflection angle and time delay in effective field
theories of gravity: The eikonal approximation is an ideal tool to extract classical observables
in gauge theory and gravity directly from scattering amplitudes. Here we
consider effective theories of gravity where in addition to the
Einstein-Hi... | hep-th |
Worldsheet two- and four-point functions at one loop in AdS(3) / CFT(2): In this note we study worldsheet two- and four-point functions at the
one-loop level for the type IIA superstring in AdS(3) x S(3) x M(4) . We first
address the regularization ambiguity that appears in the dispersion relation
derived from integrab... | hep-th |
Gauge symmetry of unimodular gravity in Hamiltonian formalism: We work out the description of the gauge symmetry of unimodular gravity in
the constrained Hamiltonian formalism. In particular, we demonstrate how the
transversality conditions restricting the diffeomorphism parameters emerge from
the algebra of the Hamilt... | hep-th |
Neutrino Majorana Masses from String Theory Instanton Effects: Finding a plausible origin for right-handed neutrino Majorana masses in
semirealistic compactifications of string theory remains one of the most
difficult problems in string phenomenology. We argue that right-handed neutrino
Majorana masses are induced by n... | hep-th |
Thirring Model as a Gauge Theory: We reformulate the Thirring model in $D$ $(2 \le D < 4)$ dimensions as a
gauge theory by introducing $U(1)$ hidden local symmetry (HLS) and study the
dynamical mass generation of the fermion through the Schwinger-Dyson (SD)
equation. By virtue of such a gauge symmetry we can greatly si... | hep-th |
Finite Size Scaling in Quantum Hallography: At low temperatures observations of the Hall resistance for Quantum Hall
systems at the interface between two Hall plateaux reveal a power-law
behaviour, dR_xy/dB ~ T^(-p) (with p = 0.42 +/- 0.01); changing at still
smaller temperatures, T < T_s, to a temperature-independent ... | hep-th |
Is it possible to recover information from the black-hole radiation?: In the framework of communication theory, we analyse the gedanken experiment
in which beams of quanta bearing information are flashed towards a black hole.
We show that stimulated emission at the horizon provides a correlation between
incoming and ou... | hep-th |
Tachyon Perturbation on Two Dimensional Black Hole: We study the geometry of the two dimensional string theoretic black hole
under tachyonic perturbations. These perturbations are restricted to affect
only the metric and the dilaton, while other string theoretic excitations (like
the axion) are ignored. The metric and ... | hep-th |
On the localization of fermions on thick D-branes: Hints on the possible localization of fermions on double thick D-branes
(Domain Walls) are found by analyzing the moduli space of parameters. Deeper
analysis toward this direction might help to select phenomenologically
plausible models. A new kind of condition for fer... | hep-th |
Conformal Symmetry for Black Holes in Four Dimensions and Irrelevant
Deformations: It has been argued several times in the past that the structure of the
entropy formula for general non-extremal asymptotically flat black holes in
four dimensions can be understood in terms of an underlying conformal symmetry.
A recent... | hep-th |
Comment on "Relativistic extension of shape-invariant potentials": This comment directs attention to some fails of the Alhaidari approach to
solve relativistic problems. It is shown that his gauge considerations are way
off the mark and that the class of exactly solvable relativistic problems is
not so enlarged as Alha... | hep-th |
D-branes on Calabi-Yau Manifolds and Superpotentials: We show how to compute terms in an expansion of the world-volume
superpotential for fairly general D-branes on the quintic Calabi-Yau using
linear sigma model techniques, and show in examples that this superpotential
captures the geometry and obstruction theory of b... | hep-th |
Particles creation from JNW quantum perturbed black holes by minimally
coupled Klein Gordon scalar free fields: In this work, we choose a minimal coupling interaction between massive Klein
Gordon (KG) quantum scalar free fields and Janis-Newman-Winicour (JNW)
spherically symmetric static black hole, to produce its Ha... | hep-th |
Supersymmetric WZW $σ$ Model on Full and Half Plane: We study classical integrability of the supersymmetric U(N) $\sigma$ model
with the Wess-Zumino-Witten term on full and half plane. We demonstrate the
existence of nonlocal conserved currents of the model and derive general
recursion relations for the infinite number... | hep-th |
Classical W-symmetry and Grassmannian Manifold: Classical W-symmetry is globally parametrized by the Grassmannian Manifold
which is associated with the non-relativistic fermions. We give the
bosonization rule which defines the natural higher coordinates system to
describe the W-geometry. Generators of the W-algebra can... | hep-th |
Fields in nonaffine bundles. III. Effective symmetries and conserved
currents in strings and higher branes: The principles of a previously developed formalism for the covariant
treatment of multi-scalar fields for which (as in a nonlinear sigma model) the
relevant target space is not of affine type -- but curved -- a... | hep-th |
Deformation Theory of Holomorphic Vector Bundles, Extended Conformal
Symmetry and Extensions of 2D Gravity: Developing on the ideas of R. Stora and coworkers, a formulation of two
dimensional field theory endowed with extended conformal symmetry is given,
which is based on deformation theory of holomorphic and Hermit... | hep-th |
Super-renormalizable or Finite Lee-Wick Quantum Gravity: We propose a class of multidimensional higher derivative theories of gravity
without extra real degrees of freedom besides the graviton field. The
propagator shows up the usual real graviton pole and extra complex conjugates
poles that do not contribute to the ab... | hep-th |
Bulk and brane radiative effects in gauge theories on orbifolds: We have computed one-loop bulk and brane mass renormalization effects in a
five-dimensional gauge theory compactified on the M_4 \times S^1/Z_2 orbifold,
where an arbitrary gauge group G is broken by the orbifold action to its
subgroup H. The space-time c... | hep-th |
Non-Higgsable clusters for 4D F-theory models: We analyze non-Higgsable clusters of gauge groups and matter that can arise
at the level of geometry in 4D F-theory models. Non-Higgsable clusters seem to
be generic features of F-theory compactifications, and give rise naturally to
structures that include the nonabelian p... | hep-th |
Critical Phenomena, Strings, and Interfaces: Some points concerning the relation of strings to interfaces in statistical
systems are discussed. | hep-th |
Superfield approach to symmetry invariance in QED with complex scalar
fields: We show that the Grassmannian independence of the super Lagrangian density,
expressed in terms of the superfields defined on a (4, 2)-dimensional
supermanifold, is a clear-cut proof for the Becchi-Rouet-Stora-Tyutin (BRST)
and anti-BRST inv... | hep-th |
Gauged D=7 Supergravity on the S**1/Z_2 Orbifold: We construct the most general couplings of a bulk seven-dimensional
Yang-Mills-Einstein N=2 supergravity with a boundary six-dimensional chiral
N=(0,1) theory of vectors and charged hypermultiplets. The boundary consists of
two brane worlds sitting at the fixed points o... | hep-th |
Anomalies on Orbifolds: We discuss the form of the chiral anomaly on an S1/Z2 orbifold with chiral
boundary conditions. We find that the 4-divergence of the higher-dimensional
current evaluated at a given point in the extra dimension is proportional to
the probability of finding the chiral zero mode there. Nevertheless... | hep-th |
Disc partition function of 2d $R^2$ gravity from DWG matrix model: We compute the sum over flat surfaces of disc topology with arbitrary number
of conical singularities. To that end, we explore and generalize a specific
case of the matrix model of dually weighted graphs (DWG) proposed and solved by
one of the authors, ... | hep-th |
Multi-Regge kinematics and the scattering equations: We study the solutions to the scattering equations in various
quasi-multi-Regge regimes where the produced particles are ordered in rapidity.
We observe that in all cases the solutions to the scattering equations admit
the same hierarchy as the rapidity ordering, and... | hep-th |
Ultraviolet Behavior of N=8 Supergravity: In these lectures I describe the remarkable ultraviolet behavior of N=8
supergravity, which through four loops is no worse than that of N=4
super-Yang-Mills theory (a finite theory). I also explain the computational
tools that allow multi-loop amplitudes to be evaluated in this... | hep-th |
Running Shear Viscosities in Anisotropic Holographic Superfluids: We have examined holographic renormalization group($RG$) flows of the shear
viscosities in anisotropic holographic superfluids via their gravity duals,
Einstein-SU(2) Yang-Mills system. In anisotropic phase, below the critical
temperature $T_c$, the SO(3... | hep-th |
Inequivalent Quantization in the Skyrme Model: Quantum mechanics on manifolds is not unique and in general infinite number
of inequivalent quantizations can be considered. They are specified by the
induced spin and the induced gauge structures on the manifold. The
configuration space of collective mode in the Skyrme mo... | hep-th |
Inflation, Gravity Mediated Supersymmetry Breaking, and de Sitter Vacua
in Supergravity with a Kähler-Invariant FI Term: We use a new mechanism for generating a Fayet-Iliopoulos term in
supergravity, which is not associated to an R symmetry, to construct a
semi-realistic theory of slow-roll inflation for a theory wit... | hep-th |
Derived Categories and Zero-Brane Stability: We define a particular class of topological field theories associated to open
strings and prove the resulting D-branes and open strings form the bounded
derived category of coherent sheaves. This derivation is a variant of some
ideas proposed recently by Douglas. We then arg... | hep-th |
Magnetized Type I Orbifolds in Four Dimensions: I review the basic features of four dimensional Z_2 x Z_2 (shift)
orientifolds with internal magnetic fields, describing two examples with N=1
supersymmetry. As in the corresponding six-dimensional examples, D9-branes
magnetized along four internal directions can mimic D5... | hep-th |
On duality of the noncommutative extension of the Maxwell-Chern-Simons
model: We study issues of duality in 3D field theory models over a canonical
noncommutative spacetime and obtain the noncommutative extension of the
Self-Dual model induced by the Seiberg-Witten map. We apply the dual projection
technique to uncov... | hep-th |
Living on the walls of super-QCD: We study BPS domain walls in four-dimensional $\mathcal{N}=1$ massive SQCD
with gauge group $SU(N)$ and $F<N$ flavors. We propose a class of
three-dimensional Chern-Simons-matter theories to describe the effective
dynamics on the walls. Our proposal passes several checks, including the... | hep-th |
On quantization in background scalar fields: We consider (0+1) and (1+1) dimensional Yukawa theory in various scalar field
backgrounds, which are solving classical equations of motion: $\ddot{\phi}_{cl}
= 0$ or $\Box \phi_{cl} = 0$, correspondingly. The (0+1)--dimensional theory we
solve exactly. In (1+1)--dimensions w... | hep-th |
Junctions of mass-deformed nonlinear sigma models on $SO(2N)/U(N)$ and
$Sp(N)/U(N)$ I: We construct on-shell ${\mathcal{N}}=2$ nonlinear sigma models on
$SO(2N)/U(N)$ and $Sp(N)/U(N)$ by holomorphically embedding the models in the
hyper-K\"{a}hler nonlinear sigma model on the cotangent bundle of the Grassmann
manifol... | hep-th |
Affine and Yangian Symmetries in $SU(2)_1$ Conformal Field Theory: In these lectures, we study and compare two different formulations of
$SU(2)$, level $k=1$, Wess-Zumino-Witten conformal field theory. The first,
conventional, formulation employs the affine symmetry of the model; in this
approach correlation functions ... | hep-th |
Universality of low-energy scattering in three-dimensional field theory: Universal low-energy behaviour ${2 m c}\over{\ln |s-4m^2|}$ of the scattering
function of particles of positive mass m near the threshold $s=4m^2$, and
${\pi} \over {\ln |s-4m^2|}$ for the corresponding S-wave phase-shift, is
established for weakl... | hep-th |
Tiny Graviton Matrix Theory/SYM Correspondence: Analysis of BPS States: In this paper we continue analysis of the Matrix theory describing the DLCQ
of type IIB string theory on AdS_5 x S^5 (and/or the plane-wave) background,
i.e. the Tiny Graviton Matrix Theory (TGMT)[hep-th/0406214]. We study and
classify 1/2, 1/4 and... | hep-th |
Surface defects and instanton partition functions: We study the superconformal index of five-dimensional SCFTs and the sphere
partition function of four-dimensional gauge theories with eight supercharges
in the presence of co-dimension two half-BPS defects. We derive a prescription
which is valid for defects which can ... | hep-th |
Extremal Branes as Elementary Particles: The supersymmetric p-branes of Type II string theory can be interpreted after
compactification as extremal black holes with zero entropy and infinite
temperature. We show how the p-branes avoid this apparent, catastrophic
instability by developing an infinite mass gap. Equivalen... | hep-th |
New Instantons for Matrix Models: The complete, nonperturbative content of random matrix models is described by
resurgent-transseries -- general solutions to their corresponding
string-equations. These transseries include exponentially-suppressed
multi-instanton amplitudes obtained by eigenvalue tunneling, but they als... | hep-th |
Space-time Geometry in Exactly Solvable Quantum Dilaton Gravity: We describe in detail how one can extract space-time geometry in an exactly
solvable model of quantum dilaton gravity of the type proposed by Callan,
Giddings, Harvey and Strominger ( CGHS ). Based on our previous work, in which
a model with 24 massless m... | hep-th |
Unifying Constructions of Non-Invertible Symmetries: In the past year several constructions of non-invertible symmetries in
Quantum Field Theory in $d\geq 3$ have appeared. In this paper we provide a
unified perspective on these constructions. Central to this framework are
so-called theta defects, which generalize the ... | hep-th |
Constraints for the existence of flat and stable non-supersymmetric
vacua in supergravity: We further develop on the study of the conditions for the existence of
locally stable non-supersymmetric vacua with vanishing cosmological constant in
supergravity models involving only chiral superfields. Starting from the two... | hep-th |
Scalar-Graviton Amplitudes and Celestial Holography: We compute scattering amplitudes involving one massive scalar and two, three,
or four gravitons. We show that when the conformal dimension of the massive
scalar is set to zero, the resulting celestial correlators depend {\it only} on
the coordinates of the gravitons.... | hep-th |
Aspects of Spontaneous N=2 -> N=1 Breaking in Supergravity: We discuss some issues related to spontaneous N=2-> N=1 supersymmetry
breaking. In particular, we state a set of geometrical conditions which are
necessary that such a breaking occurs. Furthermore, we discuss the low energy
N=1 effective Lagrangian and show th... | hep-th |
Flat deformations of type IIB S-folds: Type IIB S-folds of the form $\textrm{AdS}_{4} \times \textrm{S}^1 \times
\textrm{S}^5$ have been shown to contain axion-like deformations parameterising
flat directions in the 4D scalar potential and corresponding to marginal
deformations of the dual S-fold CFT's. In this note we... | hep-th |
The central charge in three dimensional anti-de Sitter space: This paper collects the various ways of computing the central charge
$c=3l/2G$ arising in 3d asymptotically anti-de Sitter spaces, in the
Chern-Simons formulation. Their similarities and differences are displayed. | hep-th |
Non-Unitary Holography: We propose gauge theory/gravity duality involving conformal theories based on
U(N+k|k) gauge groups. We show that to all orders in 1/N these non-unitary
theories based on supergroups are indistinguishable from the corresponding
unitary theories where the gauge group is replaced by U(N). This lea... | hep-th |
The web of swampland conjectures and the TCC bound: We consider the swampland distance and de Sitter conjectures, of respective
order one parameters $\lambda$ and $c$. Inspired by the recent Trans-Planckian
Censorship conjecture (TCC), we propose a generalization of the distance
conjecture, which bounds $\lambda$ to be... | hep-th |
Problems and Progress in Covariant High Spin Description: A universal description of particles with spins j greater or equal one ,
transforming in (j,0)+(0,j), is developed by means of representation specific
second order differential wave equations without auxiliary conditions and in
covariant bases such as Lorentz te... | hep-th |
Proper treatment of scalar and vector exponential potentials in the
Klein-Gordon equation: Scattering and bound states: We point out a misleading treatment in the literature regarding to
bound-state solutions for the $s$-wave Klein-Gordon equation with exponential
scalar and vector potentials. Following the appropria... | hep-th |
Primordial perturbations and non-Gaussianities in DBI and general
multi-field inflation: We study cosmological perturbations in general inflation models with multiple
scalar fields and arbitrary kinetic terms, with special emphasis on the
multi-field extension of Dirac-Born-Infeld (DBI) inflation. We compute the
seco... | hep-th |
Energy functionals from Conformal Gravity: We provide a new derivation of the Hawking mass and Willmore energy
functionals for asymptotically AdS spacetimes, by embedding Einstein-AdS
gravity in Conformal Gravity. By construction, the evaluation of the
four-dimensional Conformal Gravity action in a manifold with a coni... | hep-th |
Classical BRST charge for nonlinear algebras: We study the construction of the classical nilpotent canonical BRST charge
for the nonlinear gauge algebras where a commutator (in terms of Poisson
brackets) of the constraints is a finite order polynomial of the constraints.
Such a polynomial is characterized by the coeffi... | hep-th |
Superstring Perturbation Theory Revisited: Perturbative superstring theory is revisited, with the goal of giving a
simpler and more direct demonstration that multi-loop amplitudes are
gauge-invariant (apart from known anomalies), satisfy space-time supersymmetry
when expected, and have the expected infrared behavior. T... | hep-th |
The large $N$ phase diagram of ${\cal N}=2$ $SU(N)$ Chern-Simons theory
with one fundamental chiral multiplet: We study the theory of a single fundamental fermion and boson coupled to
Chern-Simons theory at leading order in the large $N$ limit. Utilizing recent
progress in understanding the Higgsed phase in Chern-Sim... | hep-th |
Landau quantization for a neutral particle in presence of topological
defects: In this paper we study the Landau levels in the non-relativistic dynamics of
a neutral particle which possesses a permanent magnetic dipole moment
interacting with an external electric field in the curved spacetime background
with the pres... | hep-th |
Massive Type IIA Theory on K3: In this paper we study K3 compactification of ten-dimensional massive type
IIA theory with all possible Ramond-Ramond background fluxes turned on. The
resulting six-dimensional theory is a new massive (gauged) supergravity with an
action that is manifestly invariant under an O(4,20) / (O(... | hep-th |
A new method for probing the late-time dynamics in the Lorentzian type
IIB matrix model: The type IIB matrix model has been investigated as a possible nonperturbative
formulation of superstring theory. In particular, it was found by Monte Carlo
simulation of the Lorentzian version that the 9-dimensional rotational sy... | hep-th |
Super Landau-Ginzburg mirrors and algebraic cycles: We investigate the super Landau-Ginzburg mirrors of gauged linear sigma
models which, in an appropriate low energy limit, reduce to nonlinear sigma
models with Kaehler supermanifold target spaces of nonnegative super-first
Chern class. | hep-th |
The extension of the massless fermion in the cosmic string spacetime: In this work, we have obtained the solutions of a massless fermion which is
under the external magnetic field around a cosmic string for specific three
potential models using supersymmetric quantum mechanics. The constant magnetic
field, energy depen... | hep-th |
Radiative Corrections in Nonrelativistic Chern-Simons Theory: We present the one-loop scalar field effective potential for the $N=2$
supersymmetric nonrelativistic self-interacting matter fields coupled to an
Abelian Chern-Simons gauge field and for its generalization when bosonic matter
fields are coupled to non-Abeli... | hep-th |
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