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we study the scattering amplitudes of massive kaluza-klein (kk) states of open and closed bosonic strings under toroidal compactification. we analyze the structure of vertex operators for the kk strings and derive an extended massive klt-like relation which connects the n-point kk closed-string amplitude to the product... | scattering amplitudes of kaluza-klein strings and extended massive double-copy |
this book provides an introduction to string field theory (sft). string theory is usually formulated in the worldsheet formalism, which describes a single string (first-quantization). while this approach is intuitive and could be pushed far due to the exceptional properties of two-dimensional theories, it becomes cumbe... | string field theory -- a modern introduction |
we examine the contribution of small instantons to the axion mass in various uv completions of qcd. we show that the reason behind the potential dominance of such contributions is the non-trivial embedding of qcd into the uv theory. the effects from instantons in the partially broken gauge group appear as "fractional i... | uv sensitivity of the axion mass from instantons in partially broken gauge groups |
it has recently been conjectured that string theory does not admit de sitter vacua, and that quintessence explains the current epoch of accelerated cosmic expansion. a proposed, key prediction of this scenario is time-varying couplings in the dark sector, induced by the evolving quintessence field. we note that cosmolo... | the swampland, quintessence and the vacuum energy |
astrophysical observations of spinning black holes, which span 5 m⊙≲mbh≲5 ×108 m⊙ , can be used to exclude the existence of certain massive bosons via the superradiance phenomenon. in this work, we explore for the first time how these measurements can be used to constrain properties of statistical distributions for the... | black hole spin constraints on the mass spectrum and number of axionlike fields |
homogeneous yang-baxter (yb) deformation of ads5 × s5 superstring is revisited. we calculate the yb sigma model action up to quadratic order in fermions and show that homogeneous yb deformations are equivalent to β-deformations of the ads5 ×s5 background when the classical r-matrices consist of bosonic generators. in o... | local β-deformations and yang-baxter sigma model |
recent work on 6d superconformal field theories has established an intricate correspondence between certain higgs branch deformations and nilpotent orbits of flavor symmetry algebras associated with t -branes. in this paper, we return to the stringy origin of these theories and show that many aspects of these deformati... | t -branes, string junctions, and 6d scfts |
ultralight scalars, if they exist as theorized, could form clouds around rapidly rotating black holes. such clouds are expected to emit continuous, quasimonochromatic gravitational waves that could be detected by ligo and virgo. here we present results of a directed search for such signals from the cygnus x-1 binary, u... | search for ultralight bosons in cygnus x-1 with advanced ligo |
using de wit-nicolai d = 4 n = 8 so(8) supergravity as an example, we show how modern machine learning software libraries such as google's tensorflow can be employed to greatly simplify the analysis of high-dimensional scalar sectors of some m-theory compactifications. we provide detailed information on the location, s... | so(8) supergravity and the magic of machine learning |
we introduce a "web-based formalism" for describing the category of half-supersymmetric boundary conditions in $1+1$ dimensional massive field theories with ${\cal n}=(2,2)$ supersymmetry and unbroken $u(1)_r$ symmetry. we show that the category can be completely constructed from data available in the far infrared, nam... | algebra of the infrared: string field theoretic structures in massive ${\\cal n}=(2,2)$ field theory in two dimensions |
we discuss techniques for embedding a nilpotent goldstino sector both in weakly coupled type iib compactifications and f-theory models at arbitrary coupling, providing examples of both scenarios in semi-realistic compactifications. we start by showing how to construct a local embedding for the nilpotent goldstino in te... | global string embeddings for the nilpotent goldstino |
in the presence of a nonzero b-field, the symmetries of the $\mathrm e_8\times \mathrm e_8$ heterotic string form a 2-group, or a categorified group, as do the symmetries of the chl string. we express the bordism groups of the corresponding tangential structures as twisted string bordism groups, then compute them throu... | bordism for the 2-group symmetries of the heterotic and chl strings |
we present a new exact treatment of t t ¯ deformed 2d cft in terms of the worldsheet theory of a non-critical string. the transverse dimensions of the non-critical string are represented by the undeformed cft, while the two longitudinal light-cone di- rections are described by two scalar fields x+ and x- with free fiel... | t t ¯ deformed cft as a non-critical string |
we study a one-parameter family of n = 2 anti-de sitter vacua with u(1)2 symmetry of gauged four-dimensional maximal supergravity, with dyonic gauge group [so(6) × so(1, 1)] ⋉ &r;12. these backgrounds are known to correspond to type iib s-fold solutions with internal manifold of topology s1 × s5. the family of ads4 vac... | global properties of the conformal manifold for s-fold backgrounds |
in any consistent effective field theory of quantum gravity limits of infinite field distance are expected to lead to the eft breakdown due to the appearance of an infinite tower of light states, as predicted by the distance conjecture. we review the distant axionic string conjecture, which proposes that any 4d eft inf... | large field distances from eft strings |
four-dimensional homogeneous static and rotating black strings in dynamical chern-simons modified gravity, with and without torsion, are presented. each solution is supported by a scalar field that depends linearly on the coordinate that span the string. the solutions are locally ads_3× r and they represent the continu... | static and rotating black strings in dynamical chern-simons modified gravity |
recently, generalized equations of type iib supergravity have been derived from the requirement of classical kappa-symmetry of type iib superstring theory in the green-schwarz formulation. these equations are covariant under generalized t -duality transformations and hence one may expect a formulation similar to double... | generalized gravity from modified dft |
we propose that propagating one-dimensional majorana fermions will develop in the vortex cores of certain iron-based superconductors, most notably li (fe1 -xcox )as . a key ingredient of this proposal is the 3d dirac cones recently observed in photoemission experiments [p. zhang et al., nat. phys. 15, 41 (2019), 10.103... | crystalline-symmetry-protected helical majorana modes in the iron pnictides |
confinement of quarks due to the strong interaction and the deconfinement at high temperatures and high densities are a basic paradigm for understanding the nuclear matter. their simulation, however, is very challenging for classical computers due to the sign problem of solving equilibrium states of finite-temperature ... | variational thermal quantum simulation of the lattice schwinger model |
skyrmions are vortex-like spin textures that form strings in magnetic crystals. due to the analogy to elastic strings, skyrmion strings are naturally expected to braid and form complex three-dimensional patterns, but this phenomenon has not been explored yet. we found that skyrmion strings can form braids in cubic crys... | magnetic skyrmion braids |
we consider the type-iib supergravity vacua that include an internal t5, depend on a single coordinate r and respect a four-dimensional poincaré symmetry, with the aim of highlighting low-energy spectra with broken supersymmetry and a bounded string coupling. these vacua are characterized by the flux φ of the self-dual... | a 4d iib flux vacuum and supersymmetry breaking. part i. fermionic spectrum |
in string theory, the traditional picture of a universe that emerges from the inflation of a very small and highly curved space-time patch is a possibility, not a necessity: quite different initial conditions are possible, and not necessarily unlikely. in particular, the duality symmetries of string theory suggest scen... | string theory and pre-big bang cosmology |
block copolymer (bcp) represents a special type of polymeric system where each of the polymer chains is composed of two or more chemically distinct homopolymer blocks that are covalently tethered together. materials made of bcps are used predominantly in their bulk form, and more recently are finding increasing applica... | block copolymer thin films |
it has recently been shown that a set of the generalized type iib supergravity equations follows from the requirement of kappa symmetry of the type iib green-schwarz superstring theory defined on an arbitrary background. in this paper, we show that the whole bosonic part of the generalized type ii supergravity equation... | weyl invariance for generalized supergravity backgrounds from the doubled formalism |
the most detailed constructions of microstate geometries, and particularly of superstrata, are done using n = (1, 0) supergravity coupled to two anti-self-dual tensor multiplets in six dimensions. we show that an important sub-sector of this theory has a consistent truncation to a particular gauged supergravity in thre... | microstate geometries from gauged supergravity in three dimensions |
we re-examine a closed-string model defined by altering the boundary conditions for one handedness of two-dimensional propagators in otherwise-standard string theory. we evaluate the amplitudes using kawai-lewellen-tye factorization into open-string amplitudes. the only modification to standard string theory is effecti... | factorization of chiral string amplitudes |
we consider two non-relativistic strings and their galilean symmetries. these strings are obtained as the two possible non-relativistic (nr) limits of a relativistic string. one of them is non-vibrating and represents a continuum of non-relativistic massless particles, and the other one is a non-relativistic vibrating ... | extended galilean symmetries of non-relativistic strings |
we obtain the effective theory for the non-linear dynamics of black branes — both neutral and charged, in asymptotically flat or anti-desitter spacetimes — to leading order in the inverse-dimensional expansion. we find that black branes evolve as viscous fluids, but when they settle down they are more naturally viewed ... | hydro-elastic complementarity in black branes at large d |
the tree-level s-matrix of type ii supergravity can be computed in scattering equation form by correlators in a worldsheet theory analogous to a chiral, infinite tension limit of the pure spinor formalism. by defining a non-minimal version of this theory, we give a prescription for computing correlators on higher genus... | scattering equations, supergravity integrands, and pure spinors |
we study the production of strange hadrons in nucleus-nucleus collisions from 4 to 160 a gev within the parton-hadron-string dynamics (phsd) transport approach that is extended to incorporate essentials aspects of chiral symmetry restoration (csr) in the hadronic sector (via the schwinger mechanism) on top of the decon... | chiral symmetry restoration versus deconfinement in heavy-ion collisions at high baryon density |
the kerr-sen black hole is a rotating charged black hole solution arising from heterotic string theory. in 4-dimensions effective theory the bosonic fields are: a $u(1)$ gauge boson, a kalb-ramond 3-form which is equivalent to a pseudoscalar axion in 4-dimensions, the dilaton and the graviton. the coupling constants in... | test of kerr-sen metric with black hole observations |
this is a review of exceptional field theory: a generalisation of kaluza-klein theory that unifies the metric and p-form gauge field degrees of freedom of supergravity into a generalised or extended geometry, whose additional coordinates may be viewed as conjugate to brane winding modes. this unifies the maximal superg... | the geometry, branes and applications of exceptional field theory |
continuous global symmetries are expected to be broken by gravity, which can lead to important phenomenological consequences. a prime example is the threat that this poses to the viability of the peccei-quinn solution to the strong cp problem. in this paper, we explore the impact of wormholes as a source of global symm... | the axion quality problem: global symmetry breaking and wormholes |
we present three lagrangian algebras in the modular 2-category associated to the 3+1d $\mathbb{z}_2$ topological order and discuss their physical interpretations, connecting algebras with gapped boundary conditions, and interestingly, maps (braided autoequivalences) exchanging algebras with bulk domain walls. a lagrang... | string condensations in 3+1d and lagrangian algebras |
weakly coupled regions of 4d efts coupled to gravity are particularly suitable to describe the backreaction of bps fundamental axionic strings, dubbed eft strings, in a local patch of spacetime around their core. we study the extension of these local solutions to global ones, which implies probing regions of strong cou... | 4d strings at strong coupling |
we study the thermodynamics and thermodynamic geometry of a five-dimensional reissner-nordström-ads black hole in the extended phase space by treating the cosmological constant as being related to the number of colors in the boundary gauge theory and its conjugate quantity as the associated chemical potential. we find ... | phase transition and thermodynamical geometry of reissner-nordström-ads black holes in extended phase space |
we revisit the factorisation of supersymmetric partition functions of 3d n = 4 gauge theories. the building blocks are hemisphere partition functions of a class of uv n = (2, 2) boundary conditions that mimic the presence of isolated vacua at infinity in the presence of real mass and fi parameters. these building block... | boundaries, vermas and factorisation |
double field theory (dft) is an attempt to make the o(d, d) t-duality symmetry of string theory manifest, already before reducing on a d-torus. it is known that supergravity can be formulated in an o(d, d) covariant way, and remarkably this remains true to the first order in α'. we set up a systematic way to analyze o(... | o(d, d) and the string α' expansion: an obstruction |
we propose a non-perturbative definition for refined topological strings. this can be used to compute the partition function of superconformal theories in 5 dimensions on squashed s 5 and the superconformal index of a large number of 6 dimensional (2 , 0) and (1 , 0) theories, including that of n coincident m5 branes. ... | superconformal partition functions and non-perturbative topological strings |
we investigate the phenomenology of a heavy scalar ϕ of the type involved in bekenstein's framework for varying electromagnetic coupling theories, with the difference that the scalar in our model has a large mass. the model has only two free parameters, the mass mϕ of the scalar and the scale λ of new physics. the scal... | heavy photophilic scalar at the lhc from a varying electromagnetic coupling |
we study the evolution of black hole collisions and ultraspinning black hole instabilities in higher dimensions. these processes can be efficiently solved numerically in an effective theory in the limit of large number of dimensions d. we present evidence that they lead to violations of cosmic censorship. the post-merg... | black hole collisions, instabilities, and cosmic censorship violation at large d |
in the low-energy effective action of string theories, non-abelian gauge interactions and supergravity are augmented by infinite towers of higher-mass-dimension operators. we propose a new method to construct one-loop matrix elements with insertions of operators d2kfn and d2krn in the tree-level effective action of typ... | one-loop matrix elements of effective superstring interactions: α'-expanding loop integrands |
we derive explicit expressions for a specific subclass of jackiw-teitelboim (jt) gravity bilocal correlators, corresponding to degenerate virasoro representations. on the disk, these degenerate correlators are structurally simple, and they allow us to shed light on the 1/c schwarzian bilocal perturbation series. in par... | degenerate operators in jt and liouville (super)gravity |
we study the in-medium effects in strangeness production in heavy-ion collisions at (sub)threshold energies of (1-2)a gev based on the microscopic parton-hadron-string dynamics (phsd) transport approach. the in-medium modifications of the antikaon (k ¯=k−,k¯0) properties are described via the self-consistent coupled-ch... | in-medium effects in strangeness production in heavy-ion collisions at (sub)threshold energies |
in the qcd axion dark matter scenario with postinflationary peccei-quinn symmetry breaking, the number density of axions, and hence the dark matter density, depends on the length of string per unit volume at cosmic time t , by convention written ζ /t2. the expectation has been that the dimensionless parameter ζ tends t... | scaling density of axion strings |
we study the non-perturbative quantum geometry of the open and closed topological string on the resolved conifold and its mirror. our tools are finite difference equations in the open and closed string moduli and the resurgence analysis of their formal power series solutions. in the closed setting, we derive new finite... | quantum curves, resurgence and exact wkb |
we argue how to identify the supersymmetric quiver quantum mechanics description of bps states, which arise in string theory in brane systems representing knots. this leads to a surprising relation between knots and quivers: to a given knot, we associate a quiver, so that various types of knot invariants are expressed ... | bps states, knots, and quivers |
we uncover and highlight relations between the m-branes in m-theory and various topological invariants: the hopf invariant over q, z and z2, the kervaire invariant, the f-invariant, and the ν-invariant. this requires either a framing or a corner structure. the canonical framing provides a minimum for the classical acti... | framed m-branes, corners, and topological invariants |
the d1d5p system has a large set of bps states at its orbifold point. perturbing away from this `free' point leads to some states joining up into long supermultiplets and lifting, while other states remain bps. we consider the simplest orbifold which exhibits this lift: that with n = 2 copies of the free c = 6 cft. we ... | lifting at higher levels in the d1d5 cft |
we revisit the old black hole s-matrix construction and its new partial wave expansion of 't hooft. inspired by old ideas from non-critical string theory & c = 1 matrix quantum mechanics, we reformulate the scattering in terms of a quantum mechanical model — of waves scattering off inverted harmonic oscillator pote... | the black hole s-matrix from quantum mechanics |
it was recently shown that the cft dual of string theory on ads3 × s3 × t 4, the symmetric orbifold of t 4, contains a closed higher spin subsector. via holography, this makes precise the sense in which tensionless string theory on this background contains a vasiliev higher spin theory. in this paper we study this phen... | higher spins on ads3 from the worldsheet |
using numerical holography, we study the collision of a planar sheet of energy with a bounded localized distribution of energy. the collision, which mimics proton-nucleus collisions, produces a localized lump of debris with transverse size r ∼1 /teff with teff the effective temperature, and has large gradients and larg... | colliding shock waves and hydrodynamics in small systems |
we examine integrable λ-deformations of so( n + 1) /so( n) coset cfts and their analytic continuations. we provide an interpretation of the deformation as a squashing of the corresponding coset σ-model's target space. we realise the λ-deformation for n = 5 case as a solution to supergravity supported by non-vanishing f... | integrable λ-deformations: squashing coset cfts and ads5 × s 5 |
in this paper, we first review the equal area laws and clapeyron equations in the extended phase space of charged anti-de sitter black holes. with different fixed parameters, the maxwell's equal area law holds not only in the pressure-thermodynamic volume oscillatory line, but also in the charge-electric potential and ... | clapeyron equations and fitting formula of the coexistence curve in the extended phase space of charged ads black holes |
in this paper we demonstrate that the stokes constants of unrefined free energies and the stokes constants of nekrasov-shatashvili free energies of topological string on a non-compact calabi-yau threefold are identical, possibly up to a sign, for any borel singularity which is not associated to a compact two-cycle that... | relations between stokes constants of unrefined and nekrasov-shatashvili topological strings |
motivated by a recent construction of non-supersymmetric $\text{ads}_3$, we revisit the $o(16)\times o(16)$ heterotic string compactified on a torus. the string one-loop potential energy has interesting dependence on the classical moduli; extrema of this potential include loci where the gauge symmetry is maximally enha... | non-supersymmetric heterotic strings on a circle |
this paper is devoted to the canonical analysis of non-linear sigma model that describes motion of non-relativistic string on stringy newton-cartan background. we determine structure of constraints of this string and compare resulting hamiltonian with previous proposal of non-relativistic string on stringy newton-carta... | nonrelativistic string theory sigma model and its canonical formulation |
we discuss the entropy carried by a quark-antiquark pair, in particular across the deconfinement transition. we therefore rely on a self-consistent solution to einstein-maxwell-dilaton gravity, capable of mimicking essential features of qcd. in particular we introduce a novel model that still captures well the qcd conf... | thermal entropy of a quark-antiquark pair above and below deconfinement from a dynamical holographic qcd model |
we study wilson loop expectations in lattice yang-mills models with a compact lie group $g$. using tools recently introduced in a companion paper, we provide alternate derivations, interpretations, and generalizations of several recent theorems about brownian motion limits (dahlqvist), lattice string trajectories (chat... | random surfaces and lattice yang-mills |
we consider four-point integrals arising in the planar limit of the conformal "fishnet" theory in four dimensions. they define a two-parameter family of higher-loop feynman integrals, which extend the series of ladder integrals and were argued, based on integrability and analyticity, to admit matrix-model-like integral... | fishnet four-point integrals: integrable representations and thermodynamic limits |
we study extremal 5- and 4-dimensional black hole solutions of the heterotic superstring effective action at first order in α' with, respectively, 3 and 4 charges of arbitrary signs. for a particular choice of the relative signs of these charges the solutions are supersymmetric, but other signs give rise to non-supersy... | non-supersymmetric black holes with α' corrections |
we perform a detailed study of linear perturbations of the jmart family of non-bps smooth horizonless solutions of type iib supergravity beyond the near-decoupling limit. in addition to the unstable quasi normal modes (qnms) responsible for the ergo-region instability, already studied in the literature, we find a new c... | charge instability of jmart geometries |
we investigate the spectral form factor in two different systems, free large n gauge theories and highly excited string gas. in both cases, after a rapid decay of the spectral form factor at early time, new contributions come in, preventing the spectral form factor from ever becoming exponentially small. we consider u(... | spectral form factor for free large n gauge theory and strings |
we introduce a new type iib 5-brane description for the e-string theory which is the world-volume theory on the m5-brane probing the end of the world m9-brane. the e-string in the new realization is depicted as spiral 5-branes web equipped with the cyclic structure which is key to uplifting to six dimensions. utilizing... | tao probing the end of the world |
in six-dimensional supergravity, there is a natural sense in which matter lying in certain representations of the gauge group is "generic," in that other "exotic" matter representations require more fine tuning. from considerations of the dimensionality of the moduli space and anomaly cancellation conditions, we find t... | generic matter representations in 6d supergravity theories |
in string theory, an important challenge is to show if the big-bang singularity could be resolved by the higher derivative α' corrections. in this work, based on the hohm-zwiebach action, we construct a series of non-singular non-perturbative cosmological solutions with the complete α' corrections, for the bosonic grav... | non-singular string cosmology via α' corrections |
we describe the back-reaction of gaugino condensates in supersymmetric ads4 type ii string theory compactifications with fluxes. we use generalized complex geometry to capture the modification of the ten-dimensional supersymmetry equations and show that the cosmological constant prevents the cycle wrapped by the branes... | kähler moduli stabilization from ten dimensions |
one of the main challenges in 3d-3d correspondence is that no existent approach offers a complete description of 3d n = 2 scft t [m3] — or, rather, a "collection of scfts" as we refer to it in the paper — for all types of 3-manifolds that include, for example, a 3-torus, brieskorn spheres, and hyperbolic surgeries on k... | 3d-3d correspondence for mapping tori |
we study the confinement/deconfinement transition in the d0-brane matrix model (often called the bfss matrix model) and its one-parameter deformation (the bmn matrix model) numerically by lattice monte carlo simulations. our results confirm general expectations from the dual string/m-theory picture for strong coupling.... | confinement/deconfinement transition in the d0-brane matrix model -- a signature of m-theory? |
microstate geometries in string theory replace the black-hole horizon with a smooth geometric "cap" at the horizon scale. in geometries constructed using superstratum technology, this cap has the somewhat surprising property that induces very large tidal deformations on infalling observers that are far away from it. we... | delaying the inevitable: tidal disruption in microstate geometries |
we dimensionally reduce the spacetime action of bosonic string theory, and that of the bosonic sector of heterotic string theory after truncating the yang-mills gauge fields, on a d -dimensional torus including all higher-derivative corrections to first order in α'. a systematic procedure is developed that brings this ... | duality invariance and higher derivatives |
we consider structure constants of single trace operators in planar \mathcal{n}=4 super-yang-mills theory within the hexagon framework. the standard procedure for forming a three point function out of two hexagons develops divergences when the effects of virtual particles wrapping around the operators are taken into ac... | structure constants at wrapping order |
we construct a new class of integrable σ-models based on current algebra theories for a general semisimple group g by utilizing a left-right asymmetric gauging. their action can be thought of as the all-loop effective action of two independent wzw models for g both at level k, perturbed by current bilinears mixing the ... | a new class of integrable deformations of cfts |
for a wide variety of quantum potentials, including the textbook `instanton' examples of the periodic cosine and symmetric double-well potentials, the perturbative data coming from fluctuations about the vacuum saddle encodes all non-perturbative data in all higher non-perturbative sectors. here we unify these examples... | quantum geometry of resurgent perturbative/nonperturbative relations |
we consider general 5d su( n ) quiver gauge theories whose nodes form an ade dynkin diagram of type g. each node has su( ni ) gauge group of general rank, chern-simons level κiand additional wifundamentals. when the total flavor number at each node is less than or equal to 2 ni- 2| κi |, we give general rules under whi... | instanton operators and symmetry enhancement in 5d supersymmetric quiver gauge theories |
celestial operator product expansions (opes) arise from the collinear limit of scattering amplitudes and play a vital role in celestial holography. in this paper, we derive the celestial opes of massless fields in string theory from the worldsheet. by studying the worldsheet opes of vertex operators in worldsheet cft a... | celestial opes and w1+∞ algebra from worldsheet in string theory |
in this paper, with the help of hermitian/non-hermitian dynamic strings, a theory of non-hermitian topological orders is developed based on a non-hermitian wen-plaquette model. the effective models for bosonic topological excitations (e particles and m particles) are hermitian tight-binding lattice models; the effectiv... | non-hermitian dynamic strings and anomalous topological degeneracy on a non-hermitian toric-code model with parity-time symmetry |
we attempt a systematic analysis of string-theoretic quintessence models as an alternative to metastable de sitter vacua. it appears that, within the boundaries of what is known, large-volume type-iib flux compactifications are preferred. here the quintessence scalar is the ratio of certain 4-cycle volumes. it has alre... | the f -term problem and other challenges of stringy quintessence |
we present a comprehensive method for the evaluation of a vast class of integrals representing 3-point functions of conformal field theories in momentum space. the method leads to analytic, closed-form expressions for all scalar and tensorial 3-point functions of operators with integer dimensions in any spacetime dimen... | evaluation of conformal integrals |
we revisit the first law of black hole thermodynamics in 4-dimensional theories containing scalar and abelian vector fields coupled to gravity using wald's formalism and a new definition of scalar charge as an integral over a 2-surface which satisfies a gauss law in the background of stationary black-hole spacetimes. w... | on scalar charges and black hole thermodynamics |
noncollinear magnetism opens exciting possibilities to generate topological superconductivity. here, we focus on helical and cycloidal magnetic textures in magnet-superconductor hybrid structures in a background magnetic field. we demonstrate that this system can enter a topological phase which can be understood as a s... | majorana modes in emergent-wire phases of helical and cycloidal magnet-superconductor hybrids |
confinement of topological excitations into particle-like states - typically associated with theories of elementary particles - are known to occur in condensed matter systems, arising as domain-wall confinement in quantum spin chains. however, investigation of confinement in the condensed matter setting has rarely vent... | soliton confinement in a quantum circuit |
we study the minimal flavor violation in the context of string effective field theory. stringy selection rules indicate that n-point couplings among fermionic zero-modes and lightest scalar modes in the string effective action are given by a product of yukawa couplings which are regarded as spurion fields of stringy an... | on stringy origin of minimal flavor violation |
the positive binding conjecture is a proposed formulation of the weak gravity conjecture appropriate to anti de-sitter (ads) space. it proposes that in a consistent gravitational theory, with a u(1) gauge symmetry, there must exist a charged particle with non-negative self-binding energy. in order to formulate this as ... | self-binding energies in ads |
prompted by the recent developments in integrable single trace t\overline{t} and j\overline{t} deformations of 2d cfts, we analyse such deformations in the context of ads3/cft2 from the dual string worldsheet cft viewpoint. we observe that the finite form of these deformations can be recast as o( d, d) transformations,... | holographic integration of t\\overline{t} & j\\overline{t} via o( d, d) |
we propose that inflation is driven by a (complex) neutral higgs of the mssm extension of the sm, in a chaotic-like inflation setting. the susy breaking soft term masses are of order 1012 - 1013 gev, which is identified with the inflaton mass scale and is just enough to stabilise the sm higgs potential. the fine-tuned ... | higgs-otic inflation and string theory |
we construct a two-parameter deformation of the metsaev-tseytlin action for supercosets with isometry group of the form g ˆ × g ˆ . the resulting action is classically integrable and is poisson-lie symmetric suggesting that the symmetry of the model is q-deformed, uql (g ˆ) ×uqr (g ˆ). focusing on the cases relevant fo... | towards a two-parameter q-deformation of ads3 ×s3 ×m4 superstrings |
we study the non-linearly realized spontaneously broken supersymmetry of the (anti-)d3-brane action in type iib string theory. the worldvolume fields are one vector aμ , three complex scalars ϕiand four 4d fermions λ 0, λ i. these transform, in addition to the more familiar {n}=4 linear supersymmetry, also under 16 spo... | string theory origin of constrained multiplets |
we investigate the properties of holographic heat engines with an uncharged accelerating non-rotating ads black hole as the working substance in a benchmarking scheme. we find that the efficiencies of the black hole heat engines can be influenced by both the size of the benchmark circular cycle and the cosmic string te... | accelerating ads black holes as the holographic heat engines in a benchmarking scheme |
we use the s -matrix bootstrap to carve out the space of unitary, crossing symmetric and supersymmetric graviton scattering amplitudes in ten dimensions. we focus on the leading wilson coefficient α controlling the leading correction to maximal supergravity. the negative region α <0 is excluded by a simple dual argu... | where is string theory in the space of scattering amplitudes? |
we extend the classification of fermionic z2×z2 heterotic string orbifolds to nonsupersymmetric pati-salam models in two classes of vacua, that we dub s ∼ models and s models. the first corresponds to compactifications of a tachyonic ten-dimensional vacuum, whereas the second corresponds to compactifications of the ten... | classification of nonsupersymmetric pati-salam heterotic string models |
the notion of a unique integrand does not a priori makes sense in field theory: different feynman diagrams have different loop momenta and there should be no reason to compare them. in string theory, however, a global integrand is natural and allows one, for instance, to make explicit the separation between left- and r... | integrands and loop momentum in string and field theory |
we use the o(d, d)-covariant formulation of supergravity familiar from double field theory to find the first α'-correction to (unimodular) homogeneous yang-baxter (yb) deformations of the bosonic string. a special case of this result gives the α'-correction to tst transformations. in a suitable scheme the correction co... | the first α'-correction to homogeneous yang-baxter deformations using o(d, d) |
we study the behavior of the scattering amplitudes of the bosonic string involving a soft massless state (graviton, dilaton and kalb-ramond antisymmetric tensor) and closed string tachyons or other closed string massless states. for a soft graviton we confirm the results, obtained in ref. [37] using just gauge invarian... | soft theorem for the graviton, dilaton and the kalb-ramond field in the bosonic string |
dynamical dark matter (ddm) is an alternative framework for dark-matter physics in which the dark sector comprises a vast ensemble of particle species whose standard-model decay widths are balanced against their cosmological abundances. previous studies of this framework have focused on a particular class of ddm ensemb... | dynamical dark matter from strongly-coupled dark sectors |
we use holographic renormalization of minimal n=2 gauged supergravity in order to derive the general form of the quantum ward identities for 3d n=2 and 4d n=1 superconformal theories on general curved backgrounds, including an arbitrary fermionic source for the supercurrent. the ward identities for 4d n=1 theories cont... | supercurrent anomalies in 4d scfts |
alp domain walls without strings may be formed in the early universe. we point out that such alp domain walls lead to both isotropic and anisotropic birefringence of cosmic microwave background (cmb) polarization, which reflects spatial configuration of the domain walls at the recombination. the polarization plane of t... | kilobyte cosmic birefringence from alp domain walls |
in this paper we consider gravitational parity anomaly in three and four dimensions. we start with a re-computation of this anomaly on a 3d manifold without boundaries and with a critical comparison of our results to the previous calculations. then we compute the anomaly on 4d manifolds with boundaries with local bag b... | gravitational parity anomaly with and without boundaries |
we investigate higher-derivative extensions of einstein-maxwell theory that are invariant under electromagnetic duality rotations, allowing for non-minimal couplings between gravity and the gauge field. working in a derivative expansion of the action, we characterize the lagrangians giving rise to duality-invariant the... | duality-invariant extensions of einstein-maxwell theory |
we find an n=1 gauge theory that flows to the rank-one n=2 superconformal field theory with e 7 flavor symmetry. we first obtain a lagrangian description for the r 0, ntheory, which appears in the s-dual description of the su( n) gauge theory with 2 n fundamental hypermultiplets. this is a straightforward generalizatio... | a "lagrangian" for the e 7 superconformal theory |
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