04307nam 22005775 450 991025460110332120200705144513.03-319-63420-810.1007/978-3-319-63420-3(CKB)3710000001631584(MiAaPQ)EBC4980402(DE-He213)978-3-319-63420-3(PPN)203851463(EXLCZ)99371000000163158420170817d2017 u| 0engurcnu||||||||rdacontentrdamediardacarrierPerturbative and Non-perturbative Approaches to String Sigma-Models in AdS/CFT /by Edoardo Vescovi1st ed. 2017.Cham :Springer International Publishing :Imprint: Springer,2017.1 online resource (246 pages) illustrations, tablesSpringer Theses, Recognizing Outstanding Ph.D. Research,2190-50533-319-63419-4 Introduction -- Superstring Actions in AdS5 × S5 and AdS4 × CP3 Spaces -- Geometric Properties of Semiclassically Quantized Strings -- “Exact” Semiclassical Quantization of Folded Spinning Strings -- Towards Precision Holography for Latitude Wilson Loops -- Light-like Cusp Anomaly and the Interpolating Function in ABJM -- AdS5 × S5 Superstring on the Lattice -- Conclusion and outlook.This thesis introduces readers to the type II superstring theories in the AdS5×S5 and AdS4×CP3 backgrounds. Each chapter exemplifies a different computational approach to measuring observables (conformal dimensions of single-trace operators and expectation values of Wilson loop operators) relevant for two supersymmetric theories: the N=4 super Yang-Mills theory and the N=6 Chern-Simons-matter (ABJM) theory.  Perturbative techniques have traditionally been used to make quantitative predictions in quantum field theories, but they are only reliable as long as the interaction strengths are weak. The anti-de Sitter/conformal field theory (AdS/CFT) correspondence realizes physicists’ dream of studying strongly coupled quantum field theories with “enhanced” symmetries, using the methods provided by string theory.  The first part of the thesis sets up the semiclassical quantization of worldsheet sigma-model actions around string solutions of least area in AdS space. This machinery is used to capture quantum corrections at large coupling to next-to-leading and next-to-next-to-leading order by solving the determinants of partial differential operators and by computing Feynman diagrams, respectively. In turn, the second part presents an innovative approach based on Monte Carlo simulations to finite coupling for a lattice-discretized model of the AdS5×S5 superstring action.  The thesis focuses on fundamental aspects, as well as on applications previously published by the author, and offers a valuable reference work for anyone interested in the most recent developments in this field.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Quantum field theoryString theoryElementary particles (Physics)SuperconductivitySuperconductorsQuantum Field Theories, String Theoryhttps://scigraph.springernature.com/ontologies/product-market-codes/P19048Elementary Particles, Quantum Field Theoryhttps://scigraph.springernature.com/ontologies/product-market-codes/P23029Strongly Correlated Systems, Superconductivityhttps://scigraph.springernature.com/ontologies/product-market-codes/P25064Quantum field theory.String theory.Elementary particles (Physics).Superconductivity.Superconductors.Quantum Field Theories, String Theory.Elementary Particles, Quantum Field Theory.Strongly Correlated Systems, Superconductivity.530.120151255Vescovi Edoardoauthttp://id.loc.gov/vocabulary/relators/aut823612BOOK9910254601103321Perturbative and Non-perturbative Approaches to String Sigma-Models in AdS1832724UNINA