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we propose a scenario with string theory in the deep ultraviolet, an intermediate asymptotically safe scaling regime for gravity and matter, and the standard model in the infrared. this could provide a new perspective to tackle challenges of the two models: for instance, the gravitational renormalization group flow cou... | asymptotic safety, string theory and the weak gravity conjecture |
any { n }=2 superconformal field theory (scft) in four dimensions has a sector of operators related to a two-dimensional chiral algebra containing a virasoro sub-algebra. moreover, there are well-known examples of isolated scfts whose chiral algebra is a virasoro algebra. in this note, we consider the chiral algebras a... | conformal manifolds in four dimensions and chiral algebras |
a network of cosmic strings (cs), if present, would continue emitting gravitational waves (gw) as it evolves throughout the history of the universe. this results in a characteristic broad spectrum making it a perfect source to infer the expansion history. in particular, a short inflationary period caused by a supercool... | imprints of a supercooled phase transition in the gravitational wave spectrum from a cosmic string network |
we investigate the quantum dynamics of the antiferromagnetic transverse field ising model on the triangular lattice through large-scale quantum monte carlo simulations and stochastic analytic continuation. this model effectively describes a series of triangular rare-earth compounds, for example, tmmggao4. at weak trans... | quantum dynamics of topological strings in a frustrated ising antiferromagnet |
recently there has been an interesting revival of the idea to use large extra dimensions to address the dark energy problem, exploiting the (true) observation that towers of states with masses split, by mn2 = f(n)m2, with f an unbounded function of the integer n, sometimes contribute to the vacuum energy only an amount... | perils of towers in the swamp: dark dimensions and the robustness of efts |
we investigate the proposed holographic duality between the tst transformation of iib string theory on ads$_3\times {\cal n}$ with ns-ns flux and a single-trace $t\bar{t}$ deformation of the symmetric orbifold cft. we present a non-perturbative calculation of two-point correlation functions using string theory and demo... | correlation functions in the tst/$t{\\bar t}$ correspondence |
a strongly-coupled sector can feature a supercooled confinement transition in the early universe. we point out that, when fundamental quanta of the strong sector are swept into expanding bubbles of the confined phase, the distance between them is large compared to the confinement scale. we suggest a modelling of the su... | string fragmentation in supercooled confinement and implications for dark matter |
in this paper, we study the implications of bulk locality on the celestial amplitude. in the context of the four-point amplitude, the fact that the bulk s-matrix factorizes locally in poles of mandelstam variables is reflected in the imaginary part of the celestial amplitude. in particular, on the real axis in the comp... | bulk locality from the celestial amplitude |
we develop a general framework for constructing charges associated with diffeomorphisms in gravitational theories using covariant phase space techniques. this framework encompasses both localized charges associated with space-time subregions, as well as global conserved charges of the full space-time. expressions for t... | a general framework for gravitational charges and holographic renormalization |
we establish the elliptic blowup equations for e-strings and m-strings and solve elliptic genera and refined bps invariants from them. such elliptic blowup equations can be derived from a path integral interpretation. we provide toric hypersurface construction for the calabi-yau geometries of m-strings and those of e-s... | elliptic blowup equations for 6d scfts. part iii. e-strings, m-strings and chains |
supervised machine learning can be used to predict properties of string geometries with previously unknown features. using the complete intersection calabi-yau (cicy) threefold dataset as a theoretical laboratory for this investigation, we use low h 1 , 1 geometries for training and validate on geometries with large h ... | getting cicy high |
in a recent paper it was shown that fundamental strings are null waves in double field theory. similarly, membranes are waves in exceptional extended geometry. here the story is continued by showing how various branes are kaluza-klein monopoles of these higher dimensional theories. examining the specific case of the e ... | branes are waves and monopoles |
we take a few steps towards constructing a string-inspired nonlocal extension of the standard model. we start by illustrating how quantum loop calculations can be performed in nonlocal scalar field theory. in particular, we show the potential to address the hierarchy problem in the nonlocal framework. next, we construc... | towards lhc physics with nonlocal standard model |
confinement is an ubiquitous phenomenon when matter couples to gauge fields, which manifests itself in a linear string potential between two static charges. although gauge fields can be integrated out in one dimension, they can mediate nonlocal interactions which in turn influence the paradigmatic luttinger liquid prop... | confinement and mott transitions of dynamical charges in one-dimensional lattice gauge theories |
a new version of double field theory (dft) is derived for the exactly solvable background of an in general left-right asymmetric wzw model in the large level limit. this generalizes the original dft that was derived via expanding closed string field theory on a torus up to cubic order. the action and gauge transformati... | double field theory on group manifolds |
we study a toy model of the kerr/cft correspondence using string theory on ads3 × s 3. we propose a single trace irrelevant deformation of the dual cft generated by a vertex operator with spacetime dimensions (2 , 1). this operator shares the same quantum numbers as the integrable t\overline{j} deformation of two-dimen... | strings on warped ads3 via t\\overline{j} deformations |
planckian interacting dark matter (pidm) is a minimal scenario of dark matter assuming only gravitational interactions with the standard model and with only one free parameter, the pidm mass. pidm can be successfully produced by gravitational scattering in the thermal plasma of the standard model sector after inflation... | theory and phenomenology of planckian interacting massive particles as dark matter |
we construct the green-schwarz terms of six-dimensional supergravity theories on spacetimes with non-trivial topology and gauge bundle. we prove the cancellation of all global gauge and gravitational anomalies for theories with gauge groups given by products of u( n), su( n) and sp( n) factors, as well as for e 8. for ... | remarks on the green-schwarz terms of six-dimensional supergravity theories |
integrability is believed to underlie the \text{ad}{{\text{s}}3}/\text{cf}{{\text{t}}2} correspondence with sixteen supercharges. we elucidate the role of massless modes within this integrable framework. firstly, we find the dressing factors that enter the massless and mixed-mass worldsheet s matrix. secondly, we deriv... | on the dressing factors, bethe equations and yangian symmetry of strings on ads3 × s 3 × t 4 |
we study if eternal inflation is realized while satisfying the recently proposed string swampland criteria concerning the range of scalar field excursion, |δ ϕ |<d .mp, and the potential gradient, |∇v |>c .v /mp , where d and c are constants of order unity and mp is the reduced planck mass. we find that only the ... | eternal inflation and swampland conjectures |
we show a direct matching between individual feynman diagrams and integration measures in the scattering equation formalism of cachazo, he and yuan. the connection is most easily explained in terms of triangular graphs associated with planar feynman diagrams in φ 3-theory. we also discuss the generalization to general ... | scattering equations and feynman diagrams |
using the covariant phase space formalism, we compute the conserved charges for a solution, describing an accelerating and electrically charged reissner-nordstrom black hole. the metric is regular provided that the acceleration is driven by an external electric field, in spite of the usual string of the standard c-metr... | thermodynamics of regular accelerating black holes |
we examine some recently-constructed families of asymptotically-ads3 × s^3 supergravity solutions that have the same charges and mass as supersymmetric d1-d5- p black holes, but that cap off smoothly with no horizon. these solutions, known as superstrata, are quite complicated, however we show that, for an infinite fam... | integrability and black-hole microstate geometries |
in this paper, we investigate light bending in the spacetime of regular black holes with cosmic strings in weak field limits. to do so, we apply the gauss-bonnet theorem to the optical geometry of the black hole; and, using the gibbons-werner method, we obtain the deflection angle of light in the weak field limits whic... | weak field deflection angle by regular black holes with cosmic strings using the gauss-bonnet theorem |
this paper describes a generalization of decomposition in orbifolds. in general terms, decomposition states that two-dimensional orbifolds and gauge theories whose gauge groups have trivially-acting subgroups decompose into disjoint unions of theories. however, decomposition can be, at least naively, broken in orbifold... | a generalization of decomposition in orbifolds |
we use a moduli space exploration algorithm to produce a complete list of maximally enhanced gauge groups that are realized in the heterotic string in 7d, encompassing the usual narain component, and five other components with rank reduction realized via nontrivial holonomy triples. using lattice embedding techniques w... | symmetry enhancements in 7d heterotic strings |
we explore the non-perturbative dyson-schwinger equations obeyed by the partition functions of the $\omega$-deformed $\mathcal{n}=2, d=4$ supersymmetric linear quiver gauge theories in the presence of surface defects. we demonstrate that the partition functions of different types of defects (orbifold or vortex strings)... | opers, surface defects, and yang-yang functional |
we report the effect of the cosmological constant and the internal energy density of a cosmic string on the deflection angle of light in the spacetime of a rotating cosmic string with internal structure. we first revisit the deflection angle by a rotating cosmic string and then provide a generalization using the geodes... | effect of the cosmological constant on the deflection angle by a rotating cosmic string |
the symmetries of string theory on {ads}_3× {s}^3× t^4 at the dual of the symmetric product orbifold point are described by a so-called higher spin square (hss). we show that the massive string spectrum in this background organises itself in terms of representations of this hss, just as the matter in a conventional hig... | string theory as a higher spin theory |
we review the ghost-free four-derivative terms for chiral superfields in n=1 supersymmetry and supergravity. these terms induce cubic polynomial equations of motion for the chiral auxiliary fields and correct the scalar potential. we discuss the different solutions and argue that only one of them is consistent with the... | higher-derivative supergravity and moduli stabilization |
we demonstrate that the problems of finding stable or metastable vacua in a low energy effective field theory requires solving nested nondeterministically polynomial (np)-hard and co-np-hard problems, while the problem of finding near-vacua can be solved in polynomial (p) time. multiple problems relevant for computing ... | computational complexity of vacua and near-vacua in field and string theory |
we argue that, in the presence of time-dependent fluxes and quantum corrections, four-dimensional de sitter solutions should appear in the type iib string landscape and not in the swampland. our construction considers generic choices of local and non-local quantum terms and satisfies the no-go and the swampland criteri... | how a four-dimensional de sitter solution remains outside the swampland |
spacetime theories obtained from perturbative string theory constructions are automatically free of perturbative anomalies, but it is not settled whether they are always free of global anomalies. here we discuss a possible $\mathbb{z}_{24}$-valued pure gravitational anomaly of heterotic compactifications down to two sp... | topological modular forms and the absence of a heterotic global anomaly |
we use insights from string field theory to analyze and cure the divergences in the cylinder diagram in minimal string theory with both boundaries lying on a zz brane. we focus on theories with worldsheet matter consisting of the (2, p) minimal model plus liouville theory, with total central charge 26, together with th... | normalization of zz instanton amplitudes in minimal string theory |
we investigate a modular $a_4$ invariant two-loop neutrino mass model in a supersymmetric framework, where we introduce new fields as minimum as possible, expecting contributions of superpartners to the neutrino masses. we successfully reproduce the neutrino oscillation data thanks to the superpartner contributions in ... | radiative neutrino masses from modular $a_4$ symmetry and supersymmetry breaking |
we show that all known 6d scfts can be obtained iteratively from an underlying set of uv progenitor theories through the processes of "fission" and "fusion". fission consists of a tensor branch deformation followed by a special class of higgs branch deformations characterized by discrete and continuous homomorphisms in... | fission, fusion, and 6d rg flows |
a systematic analysis of possibilities for realizing single-field f-term axion monodromy inflation via the flux-induced superpotential in type iib string theory is performed. in this well-defined setting the conditions arising from moduli stabilization are taken into account, where we focus on the complex-structure mod... | the challenge of realizing f-term axion monodromy inflation in string theory |
recently, google announced the first demonstration of quantum computational supremacy with a programmable superconducting processor. their demonstration is based on collecting samples from the output distribution of a noisy random quantum circuit, then applying a statistical test to those samples called linear cross-en... | on the classical hardness of spoofing linear cross-entropy benchmarking |
we show that the proper interpretation of the cocycle operators appearing in the physical vertex operators of compactified strings is that the closed string target is noncommutative. we track down the appearance of this non-commutativity to the polyakov action of the flat closed string in the presence of translational ... | intrinsic non-commutativity of closed string theory |
axions play a central role in inflationary model building and other cosmological applications. this is mainly due to their flat potential, which is protected by a global shift symmetry. however, quantum gravity is known to break global symmetries, the crucial effect in the present context being gravitational instantons... | can gravitational instantons really constrain axion inflation? |
we contrast some aspects of various syk-like models with large- n melonic behavior. first, we note that ungauged tensor models can exhibit symmetry breaking, even though these are 0+1 dimensional theories. related to this, we show that when gauged, some of them admit no singlets, and are anomalous. the uncolored majora... | contrasting syk-like models |
we study how a cosmological bounce, with a type iv singularity at the bouncing point, can be generated by a classical vacuum f (g ) gravity. we focus our investigation on the behavior of the vacuum f (g ) theory near the type iv singular bouncing point and address the stability of the resulting solution by treating the... | singular bouncing cosmology from gauss-bonnet modified gravity |
in this work, we have studied the possibility of setting up bell's inequality violating experiment in the context of cosmology, based on the basic principles of quantum mechanics. first we start with the physical motivation of implementing the bell inequality violation in the context of cosmology. then to set up the co... | bell violation in the sky |
the weak gravity conjecture, if valid, rules out simple models of natural inflation by restricting their axion decay constant to be sub-planckian. we revisit stringy attempts to realise natural inflation, with a single open string axionic inflaton from a probe d-brane in a warped throat. we show that warped geometries ... | warping the weak gravity conjecture |
we suggest that holographic tensor models related to syk are viable candidates for exactly (ie., non-perturbatively in n ) solvable holographic theories. the reason is that in these theories, the hilbert space is a spinor representation, and the hamiltonian (at least in some classes) can be arranged to commute with the... | towards a finite- n hologram |
the classical double copy procedure relates classical asymptotically-flat gravitational field solutions to yang-mills and scalar field solutions living in minkowski space. in this paper we extend this correspondence to maximally symmetric curved spacetimes. we consider asymptotically (a)ds spacetimes in kerr-schild for... | the classical double copy in maximally symmetric spacetimes |
we present new formulas for one-loop ambitwistor-string correlators for gauge theories in any even dimension with arbitrary combinations of gauge bosons, fermions and scalars running in the loop. our results are driven by new all-multiplicity expressions for tree-level two-fermion correlators in the rns formalism that ... | one-loop correlators and bcj numerators from forward limits |
we consider type ii string compactifications on calabi-yau orientifolds with fluxes and d-branes, and analyse the f-term scalar potential that simultaneously involves closed and open string modes. in type iia models with d6-branes this potential can be directly computed by integrating out minkowski three-forms. the res... | open string multi-branched and kähler potentials |
we critically review the role of cosmological moduli in determining the post-inflationary history of the universe. moduli are ubiquitous in string and m-theory constructions of beyond the standard model physics, where they parametrize the geometry of the compactification manifold. for those with masses determined by su... | cosmological moduli and the post-inflationary universe: a critical review |
we derive the protected closed-string spectra of ads3/cft2 dual pairs with 16 supercharges at arbitrary values of the string tension and of the three-form fluxes. these follow immediately from the all-loop bethe equations for the spectra of the integrable worldsheet theories. further, representing the underlying integr... | protected string spectrum in ads3/cft2 from worldsheet integrability |
in this paper we study non-perturbative instabilities in anti-de sitter vacua arising from flux compactifications of string models with broken supersymmetry. in the semi-classical limit, these processes drive the vacua towards lower fluxes, which translate into higher curvatures and higher string couplings. in order to... | brane annihilation in non-supersymmetric strings |
we obtain charged and rotating black hole solutions to the novel 3d gauss-bonnet theory of gravity recently proposed, both of which generalize the banados-teitelboim-zanelli (btz) metric. the charged solutions are obtained in the maxwell and born-infeld theories and feature 'universal thermodynamics'—identical to the t... | rotating and charged gauss-bonnet btz black holes |
the four dimensional n = 4 super-yang-mills (sym) theory exhibits rich dynamics in the presence of codimension-one conformal defects. the new structure constants of the extended operator algebra consist of one-point functions of local operators which are nonvanishing due to the defect insertion and carry nontrivial cou... | non-perturbative defect one-point functions in planar n = 4 super-yang-mills |
we study the s1 × σg topologically twisted index and the squashed sphere partition function of various 3d n ≥ 2 holographic superconformal field theories arising from m2-branes. employing numerical techniques in combination with well-motivated conjectures we provide compact closed-form expressions valid to all orders i... | large n partition functions of 3d holographic scfts |
we give new proofs of a global and a local property of the integrals which compute closed string theory amplitudes at genus zero. both kinds of properties are related to the newborn theory of single-valued periods, and our proofs provide an intuitive understanding of this relation. the global property, known in physics... | single-valued hyperlogarithms, correlation functions and closed string amplitudes |
we evaluate the backreaction of o6-planes in scale-separated ads3 flux vacua of massive type iia. using the appropriate flux scaling we show that the corrections to the various background fields and moduli are controlled and subleading when going from smeared to localized sources. similarly, the backreaction correction... | o6-plane backreaction on scale-separated type iia ads3 vacua |
the ikkt matrix model yields an emergent space-time. we further develop these ideas and give a proposal for an emergent metric. based on previous numerical studies of this model, we provide evidence that the emergent space-time is continuous and infinite in extent, both in space and in time, and that the metric is spat... | emergent metric space-time from matrix theory |
the tower weak gravity conjecture predicts infinitely many super-extremal states along every ray in the charge lattice of a consistent quantum gravity theory. we show this far-reaching claim in five-dimensional compactifications of m-theory on calabi-yau 3-folds for gauge groups with a weak coupling limit. we first cha... | the asymptotic weak gravity conjecture in m-theory |
we investigate infinite distance limits in the complex structure moduli space of f-theory compactified on k3 to eight dimensions. while this is among the simplest possible arenas to test ideas about the swampland distance conjecture, it is nevertheless non-trivial enough to improve our understanding of the physics for ... | physics of infinite complex structure limits in eight dimensions |
the distance conjecture states that an infinite tower of modes becomes exponentially light when approaching an infinite distance point in field space. we argue that the inherent path-dependence of this statement can be addressed when combining the distance conjecture with the recent tameness conjecture. the latter asse... | tameness, strings, and the distance conjecture |
in this note we revisit the homotopy-algebraic structure of oriented bosonic open-closed string field theory and we give a new compact formulation in terms of a single cyclic open-closed co-derivation which defines a single nilpotent structure describing the consistency of generic open-closed off-shell amplitudes with ... | the nilpotent structure of open-closed string field theory |
non-invertible symmetries have been extensively studied in quantum field theories in recent years. in this note we initiate their study in supergravity. we find infinite families of non-invertible defects in 11d and 10d type ii supergravities. these operators display a rich action on different probe branes. we comment ... | non-invertible symmetries in supergravity |
we use e8(8) exceptional field theory to construct the consistent truncation of iib supergravity on s3× s3× s1 to maximal 3-dimensional n = 16 gauged supergravity containing the n = (4, 4) ads3 vacuum. we explain how to achieve this by adding a 7-form flux to the s1 reduction of the dyonic e7(7) truncation on s3× s3 pr... | adding fluxes to consistent truncations: iib supergravity on ads3× s3× s3× s1 |
we consider einstein gravity with the addition of r2 and rμ νrμ ν interactions in the context of effective field theory, and the corresponding scattering amplitudes of gravitons and minimally coupled heavy scalars. first, we recover the known fact that graviton amplitudes are the same as in einstein gravity. then we sh... | note on the absence of r2 corrections to newton's potential |
at high energy densities, fivebranes are populated by a hagedorn phase of so- called little strings, whose statistical mechanics underlies black fivebrane thermodynamics. a particular limit of this phase yields btz black holes in ads3, leading us to the idea that in this context fuzzballs and highly excited little stri... | little strings, long strings, and fuzzballs |
we present new and explicit formulae for the one-loop integrands of scattering amplitudes in non-supersymmetric gauge theory and gravity, valid for any number of particles. the results exhibit the colour-kinematics duality in gauge theory and the double-copy relation to gravity, in a form that was recently observed in ... | gluons and gravitons at one loop from ambitwistor strings |
biadjoint scalar field theory has been the subject of much recent study, due to a number of applications in field and string theory. the catalogue of exact non-linear solutions of this theory is relatively unexplored, despite having a role to play in extending known relationships between gauge and gravity theories, suc... | biadjoint wires |
we argue that super-planckian diameters of axion fundamental domains can arise in calabi-yau compactifications of string theory. in a theory with n axions θi , the fundamental domain is a polytope defined by the periodicities of the axions, via constraints of the form - π < qi jθj< π. we compute the diameter of t... | planckian axions in string theory |
we compute the mutual information between finite intervals in two non-compact 2d cfts in the thermofield double formulation after one of them has been locally perturbed by a primary operator at some time t ω in the large c limit. we determine the time scale, called the scrambling time, at which the mutual information v... | scrambling time from local perturbations of the eternal btz black hole |
the coefficient of the d 6ℛ4 interaction in the low energy expansion of the two-loop four-graviton amplitude in type ii superstring theory is known to be proportional to the integral of the zhang-kawazumi (zk) invariant over the moduli space of genus-two riemann surfaces. we demonstrate that the zk invariant is an eige... | matching the d 6ℛ4 interaction at two-loops |
we present a large class of new backgrounds that are solutions of type iib supergravity with a warped ads5 factor, non-trivial axion-dilaton, b-field and three-form ramond-ramond flux but yet have no five-form flux. we obtain these solutions and many of their variations by judiciously applying non-abelian and abelian t... | type iib supergravity solutions with ads5 from abelian and non-abelian t dualities |
we use the inverse-dimensional expansion to compute analytically the frequencies of a set of quasinormal modes of static black holes of einstein-(anti-)de sitter gravity, including the cases of spherical, planar or hyperbolic horizons. the modes we study are decoupled modes localized in the near-horizon region, which a... | quasinormal modes of (anti-)de sitter black holes in the 1 /d expansion |
we find that the duality between color and kinematics can be used to inform the high energy behavior of effective field theories. namely, we demonstrate that the massless gauge theory of yang-mills deformed by a higher-derivative f3 operator cannot be tree level color dual while consistently factorizing without a tower... | color-dual fates of f3, r3, and n =4 supergravity |
in flux compactifications of type iib string theory with d3 and seven-branes, the negative induced d3 charge localized on seven-branes leads to an apparently pathological profile of the metric sufficiently close to the source. with the volume modulus stabilized in a kklt de sitter vacuum this pathological region takes ... | resolving spacetime singularities in flux compactifications & kklt |
we apply the modular approach to computing the topological string partition function on non-compact elliptically fibered calabi-yau 3-folds with higher kodaira singularities in the fiber. the approach consists in making an ansatz for the partition function at given base degree, exact in all fiber classes to arbitrary o... | topological strings on singular elliptic calabi-yau 3-folds and minimal 6d scfts |
multifield models with a curved field space have already been shown to be able to provide viable quintessence models for steep potentials that satisfy swampland bounds. the simplest dynamical systems of this type are obtained by coupling einstein gravity to two scalar fields with a curved field space. in this paper we ... | out of the swampland with multifield quintessence? |
we establish an orientifold calabi-yau threefold database for h1,1(x) ≤ 6 by considering non-trivial &z;2 divisor exchange involutions, using a toric calabi-yau database (www.rossealtman.com/tcy). we first determine the topology for each individual divisor (hodge diamond), then identify and classify the proper involuti... | orientifold calabi-yau threefolds with divisor involutions and string landscape |
these lectures notes are based on courses given at national taiwan university, national chiao-tung university, and national tsing hua university in the spring term of 2015. although the course was offered primarily for graduate students, these lecture notes have been prepared for a more general audience. they are inten... | lectures on conformal field theory |
given $2n$ unit equilateral triangles, there are finitely many ways to glue each edge to a partner. we obtain a random sphere-homeomorphic surface by sampling uniformly from the gluings that produce a topological sphere. as $n$ tends to infinity, these random surfaces (appropriately scaled) converge in law. the limit i... | what is a random surface? |
spontaneous symmetry breaking describes a variety of transformations from high- to low-temperature phases and applies to cosmological concepts as well as atomic systems. t. w. b. kibble suggested defect structures (domain walls, strings, and monopoles) to appear during the expansion and cooling of the early universe. t... | kibble-zurek mechanism in colloidal monolayers |
the lovelock gravity is a natural extension of the theory of general relativity (tgr) to higher dimensions, which presents the criteria of general covariance and whose field equations are of second order. its action contains higher order curvature terms and is reduced to the einstein-hilbert action when we consider a f... | black holes with cloud of strings and quintessence in lovelock gravity |
as described by cachazo, he and yuan, scattering amplitudes in many quantum field theories can be represented as integrals that are fully localized on solutions to the so-called scattering equations. because the number of solutions to the scattering equations grows quite rapidly, the contour of integration involves con... | integration rules for scattering equations |
recently, string theory on ads3× s3× 𝕋4 with one unit of ns-ns flux (k = 1) was argued to be exactly dual to the symmetric orbifold of 𝕋 4, and in particular, the full (unprotected) spectrum was matched between the two descriptions. this duality was later extended to the case with higher ns-ns background flux for whi... | three-point functions in ads3/cft2 holography |
in this note we examine certain classes of solutions of iia theory without sources, of the form ads2× ℳ(1) × ⋯ × ℳ(n), where ℳ(i) are riemannian spaces. we show that large hierarchies of curvatures can be obtained between the different factors, however the absolute value of the scalar curvature of ads2 must be of the s... | ads2 type-iia solutions and scale separation |
we discuss infinite families of non-supersymmetric ads6 solutions in type iib string theory. they are siblings of supersymmetric solutions which are associated with (p, q) 5-brane webs and holographically dual to 5d scfts engineered by those brane webs. the non-supersymmetric backgrounds carry identical 5-brane charges... | non-supersymmetric ads6 and the swampland |
we discuss implications of the latest bicep/keck data release for inflationary models, with special emphasis on the cosmological attractors which can describe all presently available inflation-related observational data. these models are compatible with any value of the tensor to scalar ratio r, all the way down to r =... | bicep/keck and cosmological attractors |
we discuss the string corrections to one-loop amplitudes in ads5×s5, focussing on their expressions in mellin space. we present the leading (α')3 corrections to the family of correlators <o2o2opop > at one loop and begin the exploration of the form of correlators with multiple channels. from these correlators we ... | one-loop string corrections for ads kaluza-klein amplitudes |
we study 4d friedmann-lemaître-robertson-walker cosmologies obtained from time-dependent compactifications of type iia 10d supergravity on various classes of 6d manifolds (calabi-yau, einstein, einstein-kähler). the cosmologies we present are universal in that they do not depend on the detailed features of the compacti... | universal accelerating cosmologies from 10d supergravity |
recent developments in string compactifications demonstrate obstructions to the simplest constructions of low energy cosmologies with positive vacuum energy. the existence of obstacles to creating scale-separated de sitter solutions indicates a uv/ir puzzle for embedding cosmological vacua in a unitary theory of quantu... | emergent de sitter cosmology from decaying anti-de sitter space |
we study the longitudinal magnetotransport in three-dimensional multi-weyl semimetals, constituted by a pair of (anti)-monopole of arbitrary integer charge ( n), with n = 1 ,2 and 3 in a crystalline environment. for any n > 1, even though the distribution of the underlying berry curvature is anisotropic, the corresp... | magnetotransport in multi-weyl semimetals: a kinetic theory approach |
we find four-dimensional de sitter compactifications of type iia supergravity by directly solving the 10-dimensional equations of motion. in the simplest examples, the internal space has the topology of a circle times an einstein manifold of negative curvature. an orientifold acts on the circle with two fixed loci, at ... | classical de sitter solutions of 10-dimensional supergravity |
we elaborate on the class of deformed t-dual (dtd) models obtained by first adding a topological term to the action of a supercoset sigma model and then performing (non-abelian) t-duality on a subalgebra \tilde{g} of the superisometry algebra. these models inherit the classical integrability of the parent one, and they... | on non-abelian t-duality and deformations of supercoset string sigma-models |
this document is an elementary introduction to string diagrams. it takes a computer science perspective: rather than using category theory as a starting point, we build on intuitions from formal language theory, treating string diagrams as a syntax with its semantics. after the basic theory, pointers are provided to co... | an introduction to string diagrams for computer scientists |
this work resolves a longstanding tension between the physically-expected stability of the microcanonical ensemble for gravitating systems and the fact that the known negative mode of the asymptotically flat schwarzschild black hole decays too rapidly at infinity to affect the adm energy boundary term at infinity. the ... | stability of the microcanonical ensemble in euclidean quantum gravity |
we study ads5 black holes from a recently suggested giant graviton expansion formula for the index of u(n) maximal super-yang-mills theory. we compute the large n entropy at fixed charges and giant graviton numbers ni by a saddle point analysis, and further maximize it in ni. this agrees with the dual black hole entrop... | from giant gravitons to black holes |
we introduce a method to measure many-body magic in quantum systems based on a statistical exploration of pauli strings via markov chains. we demonstrate that sampling such pauli-markov chains gives ample flexibility in terms of partitions where to sample from: in particular, it enables the efficient extraction of the ... | many-body magic via pauli-markov chains—from criticality to gauge theories |
we investigate higher derivative corrections to the extremal kerr black hole in the context of heterotic string theory with α' corrections and of a cubic-curvature extension of general relativity. by analyzing the near-horizon extremal geometry of these black holes, we are able to compute the iyer-wald entropy as well ... | the extremal kerr entropy in higher-derivative gravities |
we compute genus zero correlators of hybrid phases of calabi-yau gauged linear sigma models (glsms), i.e. of phases that are landau-ginzburg orbifolds fibered over some base. these correlators are generalisations of gromov-witten and fjrw invariants. using previous results on the structure of the of the sphere- and hem... | on genus-0 invariants of calabi-yau hybrid models |
we present a conjecture for the three-point functions of single-trace operators in planar n =4 super-yang-mills theory at finite coupling, in the case where two operators are protected. our proposal is based on the hexagon representation for structure constants of long operators, which we complete to incorporate operat... | structure constants of short operators in planar n =4 supersymmetric yang-mills theory |
we propose a new mechanism of (geometric) moduli stabilisation in type iib/f-theory four-dimensional compactifications on calabi-yau manifolds, in the presence of 7-branes, that does not rely on non-perturbative effects. complex structure moduli and the axion-dilaton system are stabilised in the standard way, without b... | perturbative moduli stabilisation in type iib/f-theory framework |
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