Academic literature on the topic 'Stringy instantons'

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Journal articles on the topic "Stringy instantons"

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Brustein, Ram, and Burt A. Ovrut. "Stringy instantons." Physics Letters B 309, no. 1-2 (July 1993): 45–52. http://dx.doi.org/10.1016/0370-2693(93)91501-d.

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Frau, M. "Stringy instantons and dualities." Fortschritte der Physik 59, no. 7-8 (March 7, 2011): 683–89. http://dx.doi.org/10.1002/prop.201100022.

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Gorbunov, I. V., and A. A. Sharapov. "String with noncommutative world-sheet and stringy instantons." Physics Letters B 531, no. 3-4 (April 2002): 255–62. http://dx.doi.org/10.1016/s0370-2693(02)01500-9.

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Argurio, Riccardo, Matteo Bertolini, Gabriele Ferretti, Christoffer Petersson, and Alberto Lerda. "Stringy instantons at orbifold singularities." Journal of High Energy Physics 2007, no. 06 (June 19, 2007): 067. http://dx.doi.org/10.1088/1126-6708/2007/06/067.

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Aharony, Ofer, and Shamit Kachru. "Stringy instantons and cascading quivers." Journal of High Energy Physics 2007, no. 09 (September 18, 2007): 060. http://dx.doi.org/10.1088/1126-6708/2007/09/060.

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Amariti, Antonio, Luciano Girardello, and Alberto Mariotti. "Stringy instantons as strong dynamics." Journal of High Energy Physics 2008, no. 11 (November 13, 2008): 041. http://dx.doi.org/10.1088/1126-6708/2008/11/041.

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Amariti, Antonio, Luciano Girardello, and Alberto Mariotti. "Stringy instantons from Seiberg duality." Nuclear Physics B - Proceedings Supplements 192-193 (July 2009): 161–62. http://dx.doi.org/10.1016/j.nuclphysbps.2009.07.066.

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Distler, Jacques, and Shamit Kachru. "Quantum symmetries and stringy instantons." Physics Letters B 336, no. 3-4 (September 1994): 368–75. http://dx.doi.org/10.1016/0370-2693(94)90547-9.

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Amariti, A., L. Girardello, and A. Mariotti. "Stringy instantons from Seiberg duality." Fortschritte der Physik 57, no. 5-7 (April 28, 2009): 478–84. http://dx.doi.org/10.1002/prop.200900055.

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Florea, Bogdan, Shamit Kachru, John McGreevy, and Natalia Saulina. "Stringy instantons and quiver gauge theories." Journal of High Energy Physics 2007, no. 05 (May 8, 2007): 024. http://dx.doi.org/10.1088/1126-6708/2007/05/024.

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Dissertations / Theses on the topic "Stringy instantons"

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Bonelli, Giulio. "Issues in Matrix String Theory." Doctoral thesis, SISSA, 1999. http://hdl.handle.net/20.500.11767/4427.

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AMARITI, ANTONIO. "Recent aspects of seiberg duality: metastable vacua, stringy instantons and M2-branes." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2009. http://hdl.handle.net/10281/7540.

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I review the basic aspects of UV/IR duality in N=1 supersymmetric gauge theories and discuss recent application. I focus on supersymmetry breaking in metastable vacua, instanton corrections and new applications to three dimensional field theories and M2 branes.
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Gutperle, Michael. "Dirichlet branes, Dirichlet instantons and string duality." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627362.

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Persson, Daniel. "Arithmetic and hyperbolic structures in string theory." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210323.

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Résumé anglais:

This thesis consists of an introductory text followed by two separate parts which may be read independently of each other. In Part I we analyze certain hyperbolic structures arising when studying gravity in the vicinity of spacelike singularities (the BKL-limit). In this limit, spatial points decouple and the dynamics exhibits ultralocal behaviour which may be mapped to an auxiliary problem given in terms of a (possibly chaotic) hyperbolic billiard. In all supergravities arising as low-energy limits of string theory or M-theory, the billiard dynamics takes place within the fundamental Weyl chambers of certain hyperbolic Kac-Moody algebras, suggesting that these algebras generate hidden infinite-dimensional symmetries of gravity. We investigate the modification of the billiard dynamics when the original gravitational theory is formulated on a compact spatial manifold of arbitrary topology, revealing fascinating mathematical structures known as galleries. We further use the conjectured hyperbolic symmetry E10 to generate and classify certain cosmological (S-brane) solutions in eleven-dimensional supergravity. Finally, we show in detail that eleven-dimensional supergravity and massive type IIA supergravity are dynamically unified within the framework of a geodesic sigma model for a particle moving on the infinite-dimensional coset space E10/K(E10).

Part II of the thesis is devoted to a study of how (U-)dualities in string theory provide powerful constraints on perturbative and non-perturbative quantum corrections. These dualities are typically given by certain arithmetic groups G(Z) which are conjectured to be preserved in the effective action. The exact couplings are given by moduli-dependent functions which are manifestly invariant under G(Z), known as automorphic forms. We discuss in detail various methods of constructing automorphic forms, with particular emphasis on a special class of functions known as (non-holomorphic) Eisenstein series. We provide detailed examples for the physically relevant cases of SL(2,Z) and SL(3,Z), for which we construct their respective Eisenstein series and compute their (non-abelian) Fourier expansions. We also discuss the possibility that certain generalized Eisenstein series, which are covariant under the maximal compact subgroup K(G), could play a role in determining the exact effective action for toroidally compactified higher derivative corrections. Finally, we propose that in the case of rigid Calabi-Yau compactifications in type IIA string theory, the exact universal hypermultiplet moduli space exhibits a quantum duality group given by the emph{Picard modular group} SU(2,1;Z[i]). To verify this proposal we construct an SU(2,1;Z[i])-invariant Eisenstein series, and we present preliminary results for its Fourier expansion which reveals the expected contributions from D2-brane and NS5-brane instantons.

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Résumé francais:

Cette thèse est composée d'une introduction suivie de deux parties qui peuvent être lues indépendemment. Dans la première partie, nous analysons des structures hyperboliques apparaissant dans l'étude de la gravité au voisinage d'une singularité de type espace (la limite BKL). Dans cette limite, les points spatiaux se découplent et la dynamique suit un comportement ultralocal qui peut être reformulé en termes d'un billiard hyperbolique (qui peut être chaotique). Dans toutes les supergravités qui sont des limites de basse énergie de théories de cordes ou de la théorie M, la dynamique du billiard prend place à l'intérieur des chambres de Weyl fondamentales de certaines algèbres de Kac-Moody hyperboliques, ce qui suggère que ces algèbres correspondent à des symétries cachées de dimension infinie de la gravité. Nous examinons comment la dynamique du billard est modifiée quand la théorie de gravité originale est formulée sur une variété spatiale compacte de topologie arbitraire, révélant ainsi de fascinantes structures mathématiques appelées galleries. De plus, dans le cadre de la supergravité à onze dimensions, nous utilisons la symétrie hyperbolique conjecturée E10 pour engendrer et classifier certaines solutions cosmologiques (S-branes). Finalement, nous montrons en détail que la supergravité à onze dimensions et la supergravité de type IIA massive sont dynamiquement unifiées dans le contexte d'un modèle sigma géodesique pour une particule se déplaçant sur l'espace quotient de dimension infinie E10/K(E10).

La deuxième partie de cette thèse est consacrée à étudier comment les dualités U en théorie des cordes fournissent des contraintes puissantes sur les corrections quantiques perturbatives et non perturbatives. Ces dualités sont typiquement données par des groupes arithmétiques G(Z) dont il est conjecturé qu'ils préservent l'action effective. Les couplages exacts sont donnés par des fonctions des moduli qui sont manifestement invariantes sous G(Z), et qu'on appelle des formes automorphiques. Nous discutons en détail différentes méthodes de construction de ces formes automorphiques, en insistant particulièrement sur une classe spéciale de fonctions appelées séries d'Eisenstein (non holomorphiques). Nous présentons comme exemples les cas de SL(2,Z) et SL(3,Z), qui sont physiquement pertinents. Nous construisons les séries d'Eisenstein correspondantes et leurs expansions de Fourier (non abéliennes). Nous discutons également la possibilité que certaines séries d'Eisenstein généralisées, qui sont covariantes sous le sous-groupe compact maximal, pourraient jouer un rôle dans la détermination des actions effectives exactes pour les théories incluant des corrections de dérivées supérieures compactifiées sur des tores.


Doctorat en Sciences
info:eu-repo/semantics/nonPublished

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Condeescu, Cezar. "Non-perturbative effects in string theory." Palaiseau, Ecole polytechnique, 2010. http://pastel.archives-ouvertes.fr/docs/00/56/57/62/PDF/Phd-thesis.pdf.

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On étudie les effets non-perturbatifs généré par des branes instantoniques Euclidiens en compactifications de la théorie des cordes de type I/II avec orientifolds et D-branes magnétisées. Le focus est sur les instantons qui peuvent générer des corrections au superpotentiel. Une condition nécessaire est que les instantons doivent enrouler des cycles rigides. On considère la compactification de la théorie de Type I (IIB) sur l'orientifold T^6/Z_2xZ_2 avec torsion discrète et D-branes magnétisées. Les instantons enroulant le même cycle que l'O-plane exotique (requis par la torsion discrète) ont la structure désiré de modes zéro pour générer des corrections au superpotentiel. On construit des modèles globales basée sur cet orientifold ou les instantons génère des termes linaires et de termes de masse dans le superpotentiel. En théorie des cordes on calcule un couplage physique duquel on doit extraire la partie olomorphique pour obtenir le superpotentiel non-perturbatif. Les facteurs non-olomorphiques sont absorbés dans le potentiel de Kähler et dans redéfinitions des champs chiraux et modules des cordes fermées. On a dérivé ces redéfinitions pour les compactifications toroïdales (avec orientifolds) de la théorie de Type I avec branes magnétisées et lignes Wilson. Finalement, on a considéré des modèles globales avec des termes linéaires. On a calculé explicitement le superpotentiel non-perturbatif pour les orientifolds toroïdales. On a montré comment faire la somme sur les contributions a un instanton. Les modèles analysées possédaient des vides non-perturbatifs supersymétriques ou le group de jauge était brisé et certains modules des cordes ouvertes étaient stabilisés
We study non-perturbative effects generated by Euclidean brane instantons in compactifications of Type I/II string theory with orientifolds and magnetized D-branes. The focus is on instantons which can generate corrections to the superpotential. A necessary condition is that the instantons have to wrap rigid cycles. We consider the compactification of Type I (IIB) on the T^6/Z_2xZ_2 orientifold with discrete torsion and magnetized branes. The instantons wrapping the same cycle as the exotic O-planes (required by the presence of discrete torsion) have the desired uncharged zero-mode structure in order to generate corrections to the superpotential. We build global models based on this orientifold where stringy instantons generate linear terms and mass terms in the superpotential. Typically, in string theory one computes a physical coupling from which one has to extract a holomorphic part in order to obtain the non-perturbative superpotential. Various non-holomorphic factors are absorbed into the Kähler potential and redefinitions of chiral fields and closed string moduli. We have derived these redefinitions in the context of toroidal (orientifold) compactifications of Type I with magnetized branes and continuous Wilson lines. Finally, we have considered global models with linear terms in the superpotential generated non-perturbatively. We have computed explicitly the non-perturbative superpotential for toroidal orientifolds. We show how to sum coherently over the various one-instanton contributions. The explicit models analyzed possessed a non-perturbative supersymmetric vacuum where the gauge group was broken and certain open-string moduli were stabilized
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Mattiello, Luca [Verfasser], and Ivo [Akademischer Betreuer] Sachs. "On instantons and finite-size D-Branes in string theory / Luca Mattiello ; Betreuer: Ivo Sachs." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1196968578/34.

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Uemura, Shohei. "D-brane Models and D-brane Instantons in Type IIA Toroidal Orientifolds." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225393.

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Schmidt-Sommerfeld, Maximilian. "One-loop and D-instanton corrections to the effective action of open string models." Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-103433.

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Terna, Stefano. "Strong Coupling Analysis of D=2 and D=4 Maximally Supersymmetric YM Theories." Doctoral thesis, SISSA, 2000. http://hdl.handle.net/20.500.11767/4330.

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Cherkis, Sergey A. "Three-Dimensional Gauge Theories and Gravitational Instantons from String Theory." Thesis, 1998. https://thesis.library.caltech.edu/10372/1/Cherkis_sa_1998.pdf.

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Various realizations of gauge theories in string theory allow an identification of their spaces of vacua with gravitational instantons. Also, they provide a correspondence of vacua of gauge theories with nonabelian monopole configurations and solutions of a system of integrable equations called Nahm equations. These identifications make it possible to apply powerful techniques of differential and algebraic geometry to solve the gauge theories in question. In other words, it becomes possible to find the exact metrics on their moduli spaces of vacua with all quantum corrections included. As another outcome we obtain for the first time the description of a series of all Dk-type gravitational instantons.
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Books on the topic "Stringy instantons"

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editor, Donagi Ron, Katz Sheldon 1956 editor, Klemm Albrecht 1960 editor, and Morrison, David R., 1955- editor, eds. String-Math 2012: July 16-21, 2012, Universität Bonn, Bonn, Germany. Providence, Rhode Island: American Mathematical Society, 2015.

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Book chapters on the topic "Stringy instantons"

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Gutperle, Michael. "Aspects of D-Instantons." In Strings, Branes and Dualities, 411–22. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4730-9_17.

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Kingaby, Thomas. "Instanton Expansions In 5DN = 2 Prepotentials." In Progress in String, Field and Particle Theory, 421–24. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0211-0_29.

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Polyakov, A. M. "Instantons in Abelian Systems." In Gauge Fields and Strings, 49–72. Routledge, 2018. http://dx.doi.org/10.1201/9780203755082-4.

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"Worldsheet instantons and torsion curves." In Advances in String Theory, 231–40. Providence, Rhode Island: American Mathematical Society, 2008. http://dx.doi.org/10.1090/amsip/044/14.

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"Anomalies, instantons and the strong CP problem." In Supersymmetry and String Theory, 76–105. 2nd ed. Cambridge University Press, 2022. http://dx.doi.org/10.1017/9781009290883.010.

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LOSEV, ANDREI S., ANDREI V. MARSHAKOV, and NIKITA A. NEKRASOV. "SMALL INSTANTONS, LITTLE STRINGS AND FREE FERMIONS." In From Fields to Strings: Circumnavigating Theoretical Physics, 581–621. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812775344_0017.

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KAZAKOV, VLADIMIR A., and IVAN K. KOSTOV. "INSTANTONS IN NON-CRITICAL STRINGS FROM THE TWO-MATRIX MODEL." In From Fields to Strings: Circumnavigating Theoretical Physics, 1864–94. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812775344_0045.

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de la Ossa, Xenia, Magdalena Larfors, and Eirik E. Svanes. "Restrictions of Heterotic G2 Structures and Instanton Connections." In Geometry and Physics: Volume II, 503–18. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198802020.003.0020.

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This chapter revisits recent results regarding the geometry and moduli of solutions of the heterotic string on manifolds Y with a G 2 structure. In particular, such heterotic G 2 systems can be rephrased in terms of a differential Ď acting on a complex Ωˇ∗(Y,Q), where Ωˇ=T∗Y⊕End(TY)⊕End(V), and Ď is an appropriate projection of an exterior covariant derivative D which satisfies an instanton condition. The infinitesimal moduli are further parametrized by the first cohomology HDˇ1(Y,Q). The chapter proceeds to restrict this system to manifolds X with an SU(3) structure corresponding to supersymmetric compactifications to four-dimensional Minkowski space, often referred to as Strominger–Hull solutions. In doing so, the chapter derives a new result: the Strominger–Hull system is equivalent to a particular holomorphic Yang–Mills covariant derivative on Q|X=T∗X⊕End(TX)⊕End(V).
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Conference papers on the topic "Stringy instantons"

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Cvetič, M., R. Richter, T. Weigand, Arttu Rajantie, Carlo Contaldi, Paul Dauncey, and Horace Stoica. "New Stringy Instanton Effects." In PARTICLES, STRINGS, AND COSMOLOGY. AIP, 2007. http://dx.doi.org/10.1063/1.2823789.

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Ahlén, Olof. "Instantons in string theory." In THE SECOND ICRANET CÉSAR LATTES MEETING: Supernovae, Neutron Stars and Black Holes. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4937214.

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Hollowood, Timothy, Nick Dorey, and Valentin V. Khoze. "A brief history of the stringy instanton." In Non-perturbative Quantum Effects 2000. Trieste, Italy: Sissa Medialab, 2000. http://dx.doi.org/10.22323/1.006.0002.

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Li, Jun, and Yun S. Song. "Open string instantons and relative stable morphisms." In The interaction of finite-type and Gromov--Witten invariants. Mathematical Sciences Publishers, 2006. http://dx.doi.org/10.2140/gtm.2006.8.49.

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Ohta, Kazutoshi. "Supersymmetric D-brane bound states with B field and higher dimensional instantons on non-commutative geometry." In STRING THEORY; 10th Tohwa University International Symposium on String Theory. AIP, 2002. http://dx.doi.org/10.1063/1.1454399.

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Cvetič, M., R. Richter, T. Weigand, and Aalok Misra. "New Stringy Instanton Effects And Neutrino Majorana Masses." In THEORETICAL HIGH ENERGY PHYSICS: International Workshop on Theoretical High Energy Physics. AIP, 2007. http://dx.doi.org/10.1063/1.2803809.

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Hammou, A. "On the perturbative corrections around D-string instantons." In European Network on Physics beyond the Standard Model. Trieste, Italy: Sissa Medialab, 1999. http://dx.doi.org/10.22323/1.002.0014.

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Ohta, Kazutoshi. "Instanton Counting, Two Dimensional Yang-Mills Theory and Topological Strings." In Proceedings of the International Sendai-Beijing Joint Workshop. WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812779649_0012.

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Zhu, W. D., and C. D. Mote. "Transient and Steady-State Response of Constrained Translating Strings." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0643.

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Abstract The exact expression describing the constraint force in a constrained translating string is derived using the Green’s function formulation. Discontinuity of the initial velocity at a boundary of the string due to a disturbance causes discontinuity in the constraint force history for any constraint that is not modeled by a single spring element. The discontinuities in the constraint force occur at instants when those propagating wave-fronts in the string with non-vanishing slope interact with the constraint. A model of a magnetic tape-recording head system is analyzed. Tape-head contact loss is predicted, depending on the amplitude and frequency of the disturbance, the head location and the preload of the tape against the head. The transient response to a harmonic end excitation is compared at the steady state to the closed-form prediction of a steady forced analysis.
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Zhu, W. D., and C. D. Mote. "Free and Forced Response of an Axially Moving String Transporting a Damped Linear Oscillator." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0135.

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Abstract The transverse response of a cable transport system, which is modelled as an ideal, constant tension string travelling at constant speed between two supports with a damped linear oscillator attached to it, is predicted for arbitrary initial conditions, external forces and boundary excitations. The exact formulation of the coupled system reduces to a single integral equation of Volterra type governing the interaction force between the string and the payload oscillator. The time history of the interaction force is discontinuous for non-vanishing damping of the oscillator. These discontinuities occur at the instants when transverse waves propagating along the string interact with the oscillator. The discontinuities are treated using the theory of distributions. Numerical algorithms for computing the integrals involving generalized functions and for solution of the delay-integral-differential equation are developed. Response analysis shows a discontinuous velocity history of the payload attachment point. Special conditions leading to absence of the discontinuities above are given.
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Reports on the topic "Stringy instantons"

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Lawrence, L. Open string instantons and superpotentials. Office of Scientific and Technical Information (OSTI), January 2000. http://dx.doi.org/10.2172/753256.

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Song, Yun S. Open String Instantons and Relative Stable Morphisms. Office of Scientific and Technical Information (OSTI), April 2001. http://dx.doi.org/10.2172/784891.

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