abstract stringlengths 3 192k | title stringlengths 4 857 |
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the recently proposed relaxion models require extremely large trans-planckian axion excursions as well as a potential explicitly violating the axion shift symmetry. the latter property is however inconsistent with the axion periodicity, which corresponds to a gauged discrete shift symmetry. a way to make things consist... | relaxion monodromy and the weak gravity conjecture |
today's probabilistic language generators fall short when it comes to producing coherent and fluent text despite the fact that the underlying models perform well under standard metrics, e.g., perplexity. this discrepancy has puzzled the language generation community for the last few years. in this work, we posit that t... | locally typical sampling |
magnetic skyrmions, topological solitons characterized by a two-dimensional swirling spin texture, have recently attracted attention as stable particle-like objects. in a three-dimensional system, a skyrmion can extend in the third dimension forming a robust and flexible string structure, whose unique topology and symm... | propagation dynamics of spin excitations along skyrmion strings |
we elaborate on the recent proposal that intersection numbers of certain cohomology classes on the moduli space of genus-zero riemann surfaces with punctures compute tree-level scattering amplitudes in quantum field theories. the relevant cohomology classes are twisted by representations of the fundamental group that d... | aspects of scattering amplitudes and moduli space localization |
the coon amplitude is a deformation of the veneziano amplitude with logarithmic regge trajectories and an accumulation point in the spectrum, which interpolates between string theory and field theory. with string theory, it is the only other solution to duality constraints explicitly known and it constitutes an importa... | unitarity and low energy expansion of the coon amplitude |
all five-dimensional non-abelian gauge theories have a u(1)i global symmetry associated with instantonic particles. we describe an obstruction to coupling u(1)i to a classical background gauge field that occurs whenever the theory has a one-form center symmetry. this is a finite-order mixed 't hooft anomaly between the... | instantons, symmetries and anomalies in five dimensions |
we study confinement in 4d n =1 s u (n ) super-yang mills (sym) from a holographic point of view, focusing on the 1-form symmetry and its relation to chiral symmetry breaking (χsb). we identify the topological couplings in the 5d truncation of the klebanov-strassler solution that determine the 1-form symmetry and its '... | holography, 1-form symmetries, and confinement |
we propose a worldsheet description for the ads5×s5 string theory dual to large n , free n =4 supersymmetric yang-mills theory in four dimensions. the worldsheet theory is a natural generalization of the recently investigated tensionless string on ads3×s3×t4. as in the case of ads3 it has a free field description, with... | string dual to free n =4 supersymmetric yang-mills theory |
we develop a new approach to extracting the physical consequences of s-duality of four-dimensional n = 4 super yang-mills (sym) and its string theory dual, based on sl(2, &z;) spectral theory.we observe that cft observables 𝒪, invariant under sl(2, &z;) transformations of a complexified gauge coupling τ, admit a uniqu... | harnessing s-duality in n = 4 sym & supergravity as sl(2, &z;)-averaged strings |
we examine the kogut-susskind formulation of lattice gauge theories under the light of fermionic and bosonic degrees of freedom that provide a description useful to the development of quantum simulators of gauge-invariant models. we consider both discrete and continuous gauge groups and adopt a realistic multicomponent... | formulation of lattice gauge theories for quantum simulations |
we study integrability of fishnet-type feynman graphs arising in planar four-dimensional bi-scalar chiral theory recently proposed in arxiv:1512.06704 as a special double scaling limit of gamma-deformed n = 4 sym theory. we show that the transfer matrix "building" the fishnet graphs emerges from the r-matrix of non-com... | integrability of conformal fishnet theory |
the worldsheet theories that describe poisson-lie t-dualisable σ-models on group manifolds as well as integrable η, λ and β-deformations provide examples of ℰ-models. here we show how such ℰ-models can be given an elegant target space description within double field theory by specifying explicitly generalised frame fie... | doubled aspects of generalised dualities and integrable deformations |
we demonstrate the validity of the string lamppost principle — that all consistent theories of quantum gravity are in the string landscape — for supersymmetric theories in d > 6 using compactness and connectedness of the moduli space of small instantons, as well as the classification of the associated coulomb branch... | compactness of brane moduli and the string lamppost principle in d > 6 |
by analogy with the landau-ginzburg theory of ordinary zero-form symmetries, we introduce and develop a landau-ginzburg theory of one-form global symmetries, which we call mean string field theory. the basic dynamical variable is a string field - defined on the space of closed loops - that can be used to describe the c... | mean string field theory: landau-ginzburg theory for 1-form symmetries |
magnetic monopoles play a central role in areas of physics that range from electromagnetism to topological matter. string theory promotes conventional vector gauge fields of electrodynamics to tensor gauge fields and predicts the existence of more exotic tensor monopoles. here, we report the synthesis of a tensor monop... | a synthetic monopole source of kalb-ramond field in diamond |
we determine the full 1/√{λ } correction to the flat-space wilson coefficients which enter the ads virasoro-shapiro amplitude in n = 4 sym theory at strong coupling. the assumption that the wilson coefficients are in the ring of single-valued multiple zeta values, as expected for closed string amplitudes, is surprising... | ads virasoro-shapiro from single-valued periods |
we clarify the higher-dimensional origin of a class of dyonic gaugings of d =4 n =8 supergravity recently discovered, when the gauge group is chosen to be iso(7). this dyonically gauged maximal supergravity arises from consistent truncation of massive iia supergravity on s6, and its magnetic coupling constant descends ... | string theory origin of dyonic n =8 supergravity and its chern-simons duals |
we classify and characterize fully all invertible anomalies and all allowed topo- logical terms related to various standard models (sm), grand unified theories (gut), and beyond standard model (bsm) physics. by all anomalies, we mean the inclusion of (1) perturbative local anomalies captured by perturbative feynman dia... | beyond standard models and grand unifications: anomalies, topological terms, and dynamical constraints via cobordisms |
modular symmetries naturally combine with traditional flavor symmetries and cp , giving rise to the so-called eclectic flavor symmetry. we apply this scheme to the two-dimensional z2 orbifold, which is equipped with two modular symmetries sl(2, z)t and sl(2, z)u associated with two moduli: the kähler modulus t and the ... | the eclectic flavor symmetry of the z2 orbifold |
we develop a novel approach to nonrelativistic closed bosonic string theory that is based on a string 1 /c2 expansion of the relativistic string, where c is the speed of light. this approach has the benefit that one does not need to take a limit of a string in a near-critical kalb-ramond background. the 1 /c2-expanded ... | nonrelativistic expansion of closed bosonic strings |
we study a quantum information metric (or fidelity susceptibility) in conformal field theories with respect to a small perturbation by a primary operator. we argue that its gravity dual is approximately given by a volume of maximal time slice in an anti-de sitter spacetime when the perturbation is exactly marginal. we ... | distance between quantum states and gauge-gravity duality |
massive gravity is holographically dual to "realistic" materials with momentum relaxation. the dual graviton potential encodes the phonon dynamics, and it allows for a much broader diversity than considered so far. we construct a simple family of isotropic and homogeneous materials that exhibit an interaction-driven me... | electron-phonon interactions, metal-insulator transitions, and holographic massive gravity |
we present a complete momentum-space prescription for the renormalisation of tensorial correlators in conformal field theories. our discussion covers all 3-point functions of stress tensors and conserved currents in arbitrary spacetime dimensions. in dimensions three and four, we give explicit results for the renormali... | renormalised 3-point functions of stress tensors and conserved currents in cft |
we discuss the origin of the choice of global structure for six dimensional (2, 0) theories and their compactifications in terms of their realization from iib string theory on ale spaces. we find that the ambiguity in the choice of global structure on the field theory side can be traced back to a subtle effect that nee... | iib flux non-commutativity and the global structure of field theories |
we continue the investigation of f-term axion monodromy inflation in string theory, while seriously taking the issue of moduli stabilization into account. for a number of closed and open string models, we show that they suffer from serious control issues once one is trying to realize trans-planckian field excursions. m... | the swampland conjecture and f-term axion monodromy inflation |
some of the most well-celebrated constructions of metastable de sitter vacua from string theory, such as the kklt proposal, involve the interplay of gaugino condensation on a d7-brane stack and an uplift by a positive tension object. these constructions have recently been challenged using arguments that rely on the tra... | understanding kklt from a 10d perspective |
we introduce a new class of collider-type observables in conformal field theories which we call generalized event shapes. they are defined as matrix elements of light-ray operators that are sensitive to the longitudinal, or time-dependent, structure of the state produced in the collision. generalized event shapes can b... | generalizing event shapes: in search of lost collider time |
starting from the defining two-point and three-point functions of celestial cfts, euclidean integral blocks are constructed for the ope of scalar primaries. in their integral form they can alternatively be fixed using poincaré symmetry acting on both massless and massive states. subsequently, an analytic continuation i... | celestial ope blocks |
we study the modular symmetric standard model effective field theory. we employ the stringy ansatz on coupling structure that 4-point couplings y(4 ) of matter fields are written by a product of 3-point couplings y(3 ) of matter fields, i.e., y(4 )=y(3 )y(3 ). in this framework, we discuss the flavor structure of bilin... | modular symmetry in the smeft |
lattice studies suggest that at zero baryon chemical potential and increasing temperature there are three characteristic regimes in qcd that are connected by smooth analytical crossovers: a hadron gas regime at t < t_ch ~ 155 mev, an intermediate regime, called stringy fluid, at t_ch < t < ~ 3 t_ch, and a quar... | large $n_c$ qcd phase diagram at $\\mu_b = 0$ |
eclectic flavor groups arising from string compactifications combine the power of modular and traditional flavor symmetries to address the flavor puzzle. this top-down scheme determines the representations and modular weights of all matter fields, imposing strict constraints on the structure of the effective potential,... | the first string-derived eclectic flavor model with realistic phenomenology |
we use string field theory to fix the normalization of the d-instanton corrections to the superpotential involving the moduli fields of type ii string theory compactified on an orientifold of a calabi-yau threefold in the absence of fluxes. we focus on o(1) instantons whose only zero modes are the four bosonic modes as... | d-instanton induced superpotential |
we study the bosonic sector of a decoupling limit of type iia superstring theory, where a background ramond-ramond one-form is fined tuned to its critical value, such that it cancels the associated background d0-brane tension. the light excitations in this critical limit are d0-branes, whose dynamics are described by b... | worldsheet formalism for decoupling limits in string theory |
six-dimensional conformal field theories with (2, 0) supersymmetry are shown to possess a protected sector of operators and observables that are isomorphic to a two-dimensional chiral algebra. we argue that the chiral algebra associated to a (2, 0) theory labelled by the simply-laced lie algebra is precisely the algebr... | symmetry in six dimensions |
we consider weakly coupled theories of massive higher-spin particles. this class of models includes, for instance, tree-level string theory and large-n yang-mills theory. the s-matrix in such theories is a meromorphic function obeying unitarity and crossing symmetry. we discuss the (unphysical) regime s, t ≫ 1, in whic... | strings from massive higher spins: the asymptotic uniqueness of the veneziano amplitude |
conformal defects describe the universal behaviors of a conformal field theory (cft) in the presence of a boundary or more general impurities. the coupled critical system is characterized by new conformal anomalies which are analogous to, and generalize those of standalone cfts. here we study the conformal a- and c-ano... | defect a-theorem and a-maximization |
we show that using the loop-string-hadron (lsh) formulation of su(2) lattice gauge theory (i. raychowdhury and j. r. stryker, phys. rev. d 101, 114502 (2020), 10.1103/physrevd.101.114502) as a basis for digital quantum computation easily solves an important problem of fundamental interest: implementing gauge invariance... | solving gauss's law on digital quantum computers with loop-string-hadron digitization |
we analyse global anomalies and related constraints in the standard model (sm) and various beyond the standard model (bsm) theories. we begin by considering four distinct, but equally valid, versions of the sm, in which the gauge group is taken to be g = gsm/γn, with gsm = su(3) × su(2) × u(1) and γn isomorphic to &z;/... | global anomalies in the standard model(s) and beyond |
orientifold $p$-planes with $p\le4$ have fractional d$p$-charges, and therefore appear inconsistent with dirac quantization with respect to d$(6-p)$-branes. we explain in detail how this issue is resolved by taking into account the anomaly of the worldvolume fermions using the $\eta$ invariants. we also point out relat... | why are fractional charges of orientifolds compatible with dirac quantization? |
we study the vacua of 4d heterotic toroidal orbifolds using effective theories consisting of an overall kähler modulus, the dilaton, and non-perturbative corrections to both the superpotential and kähler potential that respect modular invariance. we prove three de sitter no-go theorems for several classes of vacua and ... | heterotic de sitter beyond modular symmetry |
we revisit the emergence proposal in 4d n = 2 vector multiplet sectors that arise from type ii string calabi-yau compactifications, with emphasis on the role of axionic fundamental strings, or eft strings. we focus on large-volume type iia compactifications, where eft strings arise from ns5-branes wrapping internal fou... | eft strings and emergence |
we show using diagramtic arguments that in some (but not all) cases, the temperature dependent part of the chiral vortical effect coefficient is independent of the coupling constant. an interpretation of this result in terms of quantization in the effective 3 dimensional chern-simons theory is also given. in the langua... | (non)-renormalization of the chiral vortical effect coefficient |
we introduce a formalism for describing holomorphic blocks of 3d quiver gauge theories using networks of ding-iohara-miki algebra intertwiners. our approach is very direct and gives an explicit identification of the blocks with dotsenko-fateev type integrals for q-deformed quiver w-algebras. we also explain how quiver ... | higgsed network calculus |
motivated by the recently reported diphoton excess at 750 gev observed by both cms and atlas, we study string-based particle physics models which can accommodate this signal. quite remarkably, although grand unified theories in f-theory tend to impose tight restrictions on candidate extra sectors, the case of a probe d... | 750 gev diphotons from a d3-brane |
we use the f-theory realization of 6d superconformal field theories (scfts) to study the corresponding spectrum of stringlike, i.e., surface defects. on the tensor branch, all of the stringlike excitations pick up a finite tension, and there is a corresponding lattice of string charges, as well as a dual lattice of cha... | on the defect group of a 6d scft |
we present a consistency condition for 8d n =1 supergravity theories with nontrivial global structure g /z for the non-abelian gauge group, based on an anomaly involving the z 1-form center symmetry. the interplay with other swampland criteria identifies the majority of 8d theories with gauge group g /z , which have no... | string universality and non-simply-connected gauge groups in 8d |
we study six dimensional supergravity theories with superconformal sectors (scfts). instances of such theories can be engineered using type iib strings, or more generally f-theory, which translates field theoretic constraints to geometry. specifically, we study the fate of the discrete 2-form global symmetries of the s... | gauged 2-form symmetries in 6d scfts coupled to gravity |
we systematically study 4d n = 2 superconformal field theories (scfts) that can be constructed via type iib string theory on isolated hypersurface singularities (ihss) embedded in ℂ4. we show that if a theory in this class has no n = 2-preserving exactly marginal deformation (i.e., the theory is isolated as an n = 2 sc... | 1-form symmetry, isolated n = 2 scfts, and calabi-yau threefolds |
we study whether the universal runaway behaviour of stringy scalar potentials towards infinite field distance limits can produce an accelerated expanding cosmology à la quintessence. we identify a loophole to some proposed bounds that forbid such asymptotic (at parametric control) accelerated expansion in 4d n = 1 supe... | asymptotic accelerated expansion in string theory and the swampland |
we review work on `decomposition,' a property of two-dimensional theories with 1-form symmetries and, more generally, d-dimensional theories with (d-1)-form symmetries. decomposition is the observation that such quantum field theories are equivalent to (`decompose into') disjoint unions of other qfts, known in this con... | an introduction to decomposition |
spin correlations of λ -hyperons embedded in the qcd strings formed in high energy collider experiments provide unique insight into their locality and entanglement features. we show from general considerations that, while the clauser-horne-shimony-holt inequality is less stringent for such states, they provide a benchm... | measurement of bell-type inequalities and quantum entanglement from λ -hyperon spin correlations at high energy colliders |
the worldsheet string theory dual to free 4d n = 4 super yang-mills theory was recently proposed in [1]. it is described by a free field sigma model on the twistor space of ads5 × s5, and is a direct generalisation of the corresponding model for tensionless string theory on ads3 × s3. as in the case of ads3, the worlds... | the worldsheet dual of free super yang-mills in 4d |
we show that transformer-based large language models are computationally universal when augmented with an external memory. any deterministic language model that conditions on strings of bounded length is equivalent to a finite automaton, hence computationally limited. however, augmenting such models with a read-write m... | memory augmented large language models are computationally universal |
we investigate iterated integrals on an elliptic curve, which are a natural genus-one generalization of multiple polylogarithms. these iterated integrals coincide with the multiple elliptic polylogarithms introduced by brown and levin when constrained to the real line. at unit argument they reduce to an elliptic analog... | elliptic multiple zeta values and one-loop superstring amplitudes |
we present a microscopic model for collective effects in high multiplicity proton-proton collisions, where multiple partonic subcollisions give rise to a dense system of strings. from lattice calculations we know that qcd strings are transversely extended, and we argue that this should result in a transverse pressure a... | collectivity without plasma in hadronic collisions |
the question of whether the holomorphic collinear singularities of graviton amplitudes define a consistent chiral algebra has garnered much recent attention. we analyse a version of this question for infinitesimal perturbations around the self-dual sector of 4d einstein gravity. the singularities of tree amplitudes in ... | on the associativity of 1-loop corrections to the celestial operator product in gravity |
we study the orbifold singularities x=\mathbb{c}^3/\gammax=ℂ3/γ where \gammaγ is a finite subgroup of su(3)su(3). m-theory on this orbifold singularity gives rise to a 5d scft, which is investigated with two methods. the first approach is via 3d mckay correspondence which relates the group theoretic data of \gammaγ to ... | 5d and 6d scfts from \\mathbb{c}(3)orbifolds |
almost a century ago, string states—complex bound states of magnetic excitations—were predicted to exist in one-dimensional quantum magnets. however, despite many theoretical studies, the experimental realization and identification of string states in a condensed-matter system have yet to be achieved. here we use high-... | experimental observation of bethe strings |
we study a family of 2d n=(0, 4) gauge theories which describes at low energy the dynamics of e-strings, the m2-branes suspended between a pair of m5 and m9 branes. the gauge theory is engineered using a duality with type iia theory, leading to the d2-branes suspended between an ns5-brane and 8 d8-branes on an o8-plane... | elliptic genus of e-strings |
the trinions tn are a class of 5d n = 1 superconformal field theories (scfts) realized as m-theory on ℂ3/&z;n× &z;n . we apply to tn , as well as closely-related scfts that are obtained by mass deformations, a multitude of recently developed approaches to studying 5d scfts and their ir gauge theory descriptions. thereb... | trifectas for tn in 5d |
in this note, we study a simplified variant of the familiar holographic duality between supergravity on ads3×s3×t4 and the scft (on the moduli space of) the symmetric orbifold theory s y mn(t4) as n →∞ . this variant arises conjecturally from a twist proposed by the first author and si li. we recover a number of result... | twisted supergravity and koszul duality: a case study in ads3 |
lorentz symmetry is a fundamental spacetime symmetry underlying both the standard model of particle physics and general relativity. this symmetry guarantees that physical phenomena are observed to be the same by all inertial observers. however, unified theories, such as string theory, allow for violation of this symmet... | neutrino interferometry for high-precision tests of lorentz symmetry with icecube |
the global symmetries of a $d$-dimensional qft can, in many cases, be captured in terms of a $(d+1)$-dimensional symmetry topological field theory (symtft). in this work we construct a $(d+1)$-dimensional theory which governs the symmetries of qfts with multiple sectors which have connected correlators that admit a dec... | symtrees and multi-sector qfts |
the stringy realization of generalized symmetry operators involves wrapping "branes at infinity". we argue that in the case of continuous (as opposed to discrete) symmetries, the appropriate objects are fluxbranes. we use this perspective to revisit the phase structure of verlinde's monopole, a proposed particle which ... | fluxbranes, generalized symmetries, and verlinde's metastable monopole |
the tadpole conjecture by bena, blåbäck, graña and lüst effectively states that for string-theory compactifications with a large number of complex-structure moduli, not all of these moduli can be stabilized by fluxes. in this note we study this conjecture in the large complex-structure regime using statistical data obt... | the tadpole conjecture at large complex-structure |
we study open and closed string amplitudes at tree-level in string perturbation theory using the methods of single-valued integration which were developed in the prequel to this paper (brown and dupont in single-valued integration and double copy, 2020). using dihedral coordinates on the moduli spaces of curves of genu... | single-valued integration and superstring amplitudes in genus zero |
we review recent developments in the construction of heterotic and type ii string field theories and their various applications. these include systematic procedures for determining the shifts in the vacuum expectation values of fields under quantum corrections, computing renormalized masses and s-matrix of the theory a... | closed superstring field theory and its applications |
we study nonrelativistic field theory coupled to a torsional newton-cartan (nc) geometry both directly and holographically. the latter involves gravity on asymptotically local lifshitz space-times. we define an energy-momentum tensor and a mass current and study the relation between conserved currents and conformal kil... | schrödinger invariance from lifshitz isometries in holography and field theory |
the swampland distance conjecture (sdc) restricts the geodesic distances that scalars can traverse in effective field theories as they approach points at infinite distance in moduli space. we propose that, when applied to the subset of light fields in effective theories with scalar potentials, the sdc restricts the amo... | the convex hull swampland distance conjecture and bounds on non-geodesics |
we study soft theorems in a broader context, their universality in effective field theories and string theory, as well as continue the analysis of their fate at loop level. in effective field theories with f3 and r3 interactions, the soft theorems are not modified. however, for gravity theories with r2ϕ interactions, t... | more on soft theorems: trees, loops, and strings |
we analyze topological mass terms of bf type arising in supersymmetric m-theory compactifications to ads5. these describe spontaneously broken higher-form gauge symmetries in the bulk. different choices of boundary conditions for the bf terms yield dual field theories with distinct global discrete symmetries. we discus... | discrete and higher-form symmetries in scfts from wrapped m5-branes |
5d superconformal field theories (scfts) can be obtained from 6d scfts by circle compactification and mass deformation. successive decoupling of hypermultiplet matter and rg-flow generates a decoupling tree of descendant 5d scfts. in this paper we determine the magnetic quivers and hasse diagrams, that encode the higgs... | (5d rg-flow) trees in the tropical rain forest |
multiquark states have been advocated to explain recent experimental data in the heavy-light sector, and there are already speculations about multiquarks containing only heavy quarks and antiquarks. with a rigorous treatment of the four-body problem in current quark models, full-charm (c c c ¯c ¯) and full-beauty (b b ... | string dynamics and metastability of all-heavy tetraquarks |
we show that, in dimensional regularization in the minimal subtraction scheme, the qcd trace anomaly can be unambiguously decomposed into two parts coming from the renormalized quark and gluon energy momentum tensors. we carry out this decomposition at the two-loop level. the result can be used to constrain the renorma... | quark and gluon contributions to the qcd trace anomaly |
recently a swampland criterion has been proposed that rules out de sitter vacua in string theory. such a criterion should hold at all points in the field space and especially at points where the system is on-shell. however there has not been any attempt to examine the swampland criterion against explicit equations of m... | quantum corrections and the de sitter swampland conjecture |
in a consistent top-down approach based on orbifold compactifications, modular and traditional flavor symmetries combine nontrivially to the so-called eclectic flavor symmetry. we extend this scheme from two extra dimensions, discussed previously, to the six extra dimensions of string theory. by doing so, new insights ... | eclectic flavor scheme from ten-dimensional string theory - i. basic results |
an intriguing correspondence between ingredients in geometric function theory related to the famous bieberbach conjecture (de branges' theorem) and the non-perturbative crossing symmetric representation of 2-2 scattering amplitudes of identical scalars is pointed out. using the dispersion relation and unitarity, we are... | quantum field theory and the bieberbach conjecture |
four-dimensional n = 2 superconformal field theories have families of protected correlation functions that possess the structure of two-dimensional chiral algebras. in this paper, we explore the chiral algebras that arise in this manner in the context of theories of class s . the class s duality web implies nontrivial ... | chiral algebras of class s |
the kerr-schild (ks) formalism is a powerful tool for constructing exact solutions in general relativity. in this paper, we present a generalization of the conventional ks formalism to double field theory (dft) and supergravities. we introduce a generalized ks ansatz for the generalized metric in terms of a pair of nul... | kerr-schild double field theory and classical double copy |
s-folds are generalizations of orientifolds in type iib string theory, such that the geometric identifications are accompanied by non-trivial s-duality transformations. they were recently used by garcía-etxebarria and regalado to provide the first construction of four dimensional mathcal{n} =3 superconformal theories. ... | s-folds and 4d mathcal{n} = 3 superconformal field theories |
we relate one-loop scattering amplitudes of massless open- and closed-string states at the level of their low-energy expansion. the modular graph functions resulting from integration over closed-string punctures are observed to follow from symmetrized open-string integrals through a tentative generalization of the sing... | from elliptic multiple zeta values to modular graph functions: open and closed strings at one loop |
the physics of m5 branes placed near an m9 plane on an a-type ale singularity exhibits a variety of phenomena that introduce additional massless degrees of freedom. there are tensionless strings whenever two m5 branes coincide or whenever an m5 brane approaches the m9 plane. these systems do not admit a low-energy lagr... | magnetic quivers, higgs branches and 6d n = (1, 0) theories |
we describe new ambitwistor string theories that give rise to the recent amplitude formulae for einstein-yang-mills, (dirac)-born-infeld, galileons and others introduced by cachazo, he and yuan. in the case of the einstein-yang-mills amplitudes, an important role is played by a novel worldsheet conformal field theory t... | new ambitwistor string theories |
compactifications of the heterotic string on td are the simplest, yet rich enough playgrounds to uncover swampland ideas: the u(1)d+16 left-moving gauge symmetry gets enhanced at special points in moduli space only to certain groups. we state criteria, based on lattice embedding techniques, to establish whether a gauge... | exploring the landscape of heterotic strings on td |
a two-phase description of the quark-nuclear matter hybrid equation of state that takes into account the effect of excluded volume in both the hadronic and the quark-matter phases is introduced. the nuclear phase manifests a reduction of the available volume as density increases, leading to a stiffening of the matter. ... | quark-nuclear hybrid star equation of state with excluded volume effects |
we evaluate one-loop open-string amplitudes at finite \alpha'α′ for the first time. our method involves a deformation of the integration contour over the modular parameter \tauτ to a fractal contour introduced by rademacher in the context of analytic number theory. this procedure leads to explicit and practical formula... | evaluating one-loop string amplitudes |
we study holographic entanglement and information scrambling in de-sitter (ds) space in the context of the ds/ds correspondence. we find that our previously identified non-local entanglement structure of ds vacua can be extended out of the time-reflection symmetric slice. we extend the geometry to a two-sided configura... | non-local entanglement and fast scrambling in de-sitter holography |
we use the duality between color and kinematics to obtain scattering amplitudes in non-minimal conformal n=0,1,2,4 (super)gravity theories. generic tree amplitudes can be constructed from a double copy between (super-)yang-mills theory and a new gauge theory built entirely out of dimension-six operators. the latter the... | conformal gravity from gauge theory |
we consider geodesics of infinite length and with constant 4d dilaton in the (classical) hypermultiplet moduli space of type ii calabi-yau compactifications. when approaching such infinite distance points, a large amount of d-instantons develop an exponentially suppressed action, substantially modifying the moduli spac... | instantons and infinite distances |
we present a stringy realization of quantum field theory ensembles in d ≤4 spacetime dimensions, thus realizing a disorder averaging over coupling constants. when each member of the ensemble is a conformal field theory with a standard semiclassical holographic dual of the same radius, the resulting bulk can be interpre... | disorder averaging and its uv discontents |
we compute the sphere and disk partition functions in semiclassical liouville and analogous quantities in double-scaled matrix integrals. the quantity sphere/disk2 is unambiguous and we find a precise numerical match between the liouville answer and the matrix integral answer. an application is to show that the sphere ... | sphere and disk partition functions in liouville and in matrix integrals |
it has recently been conjectured that string theory does not admit de sitter critical points. this note points out that in several cases, including kklt or racetrack models, this statement is equivalent to the absence of supersymmetric minkowski or ads solutions. this equivalence arises from establishing the positivity... | the de sitter swampland conjecture and supersymmetric ads vacua |
chiral higher spin gravity is unique in being the smallest higher spin extension of gravity and in having a simple local action both in flat and (anti-)de sitter spaces. it must be a closed subsector of any other higher spin theory in four dimensions, which makes it an important building block and benchmark. using the ... | more on quantum chiral higher spin gravity |
in this paper we begin revisiting the little string theories (lsts) which govern the dynamics of the instantonic heterotic e8 × e8 five-branes probing ale singularities, building on and extending previous results on the subject by aspinwall and morrison as well as blum and intriligator. our focus are the cases correspo... | back to heterotic strings on ale spaces. part i. instantons, 2-groups and t-duality |
starting from an already known solution in the literature, we study the dynamical cobordism induced by the backreaction of a non-supersymmetric, positive tension domain wall in string theory. this could e.g. be a non-bps d8-brane of type i or a d 8 ¯/o8 stack of a non-supersymmetric type iia orientifold. the singularit... | dynamical cobordism of a domain wall and its companion defect 7-brane |
we study rg flows between superconformal field theories living in different spacetime dimensions which exhibit universal properties, independent of the details of the uv and ir theories. in particular, when the uv and ir theories are both even-dimensional we establish exact universal relations between their conformal a... | universal rg flows across dimensions and holography |
we present a new model of large field inflation along a winding trajectory in the field space of two axionic fields, where the "axions" originate from the complex structure moduli sector of a calabi-yau 3-fold at large complex structure. the winding trajectory arises from fixing one combination of axions by bulk fluxes... | winding out of the swamp: evading the weak gravity conjecture with f-term winding inflation? |
an example of a higher spin gravity in four-dimensional flat space has recently been constructed by d. ponomarev and e. d. skvortsov, j. phys. a, 50, 095401(2017). this theory is chiral and the action is written in the light-cone gauge. the theory has certain stringy features, e.g., admits chan-paton factors. we show t... | quantum chiral higher spin gravity |
using the ambitwistor string, we compute tree-level celestial amplitudes for biadjoint scalars, yang-mills and gravity to all multiplicities. they are presented in compact chy-like formulas with operator-valued scattering equations and numerators acting on a generalized hypergeometric function. with these we extend the... | celestial double copy from the worldsheet |
we study the hall conductivity in holographic models where translational invariance is broken by a lattice. we show that generic holographic theories will display a different temperature dependence in the hall angle as to the dc conductivity. our results suggest a general mechanism for obtaining an anomalous scaling of... | quantum critical transport and the hall angle in holographic models |
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