LEADER 04307nam 22005775 450 001 9910254601103321 005 20200705144513.0 010 $a3-319-63420-8 024 7 $a10.1007/978-3-319-63420-3 035 $a(CKB)3710000001631584 035 $a(MiAaPQ)EBC4980402 035 $a(DE-He213)978-3-319-63420-3 035 $a(PPN)203851463 035 $a(EXLCZ)993710000001631584 100 $a20170817d2017 u| 0 101 0 $aeng 135 $aurcnu|||||||| 181 $2rdacontent 182 $2rdamedia 183 $2rdacarrier 200 10$aPerturbative and Non-perturbative Approaches to String Sigma-Models in AdS/CFT /$fby Edoardo Vescovi 205 $a1st ed. 2017. 210 1$aCham :$cSpringer International Publishing :$cImprint: Springer,$d2017. 215 $a1 online resource (246 pages) $cillustrations, tables 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 311 $a3-319-63419-4 327 $aIntroduction -- 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. 330 $aThis thesis introduces readers to the type II superstring theories in the AdS5×S5 and AdS4×CP3 backgrounds. Each chapter exemplifies a different computational approach to measuring observables (conformal dimensions of single-trace operators and expectation values of Wilson loop operators) relevant for two supersymmetric theories: the N=4 super Yang-Mills theory and the N=6 Chern-Simons-matter (ABJM) theory.  Perturbative techniques have traditionally been used to make quantitative predictions in quantum field theories, but they are only reliable as long as the interaction strengths are weak. The anti-de Sitter/conformal field theory (AdS/CFT) correspondence realizes physicists? dream of studying strongly coupled quantum field theories with ?enhanced? symmetries, using the methods provided by string theory.  The first part of the thesis sets up the semiclassical quantization of worldsheet sigma-model actions around string solutions of least area in AdS space. This machinery is used to capture quantum corrections at large coupling to next-to-leading and next-to-next-to-leading order by solving the determinants of partial differential operators and by computing Feynman diagrams, respectively. In turn, the second part presents an innovative approach based on Monte Carlo simulations to finite coupling for a lattice-discretized model of the AdS5×S5 superstring action.  The thesis focuses on fundamental aspects, as well as on applications previously published by the author, and offers a valuable reference work for anyone interested in the most recent developments in this field. 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 606 $aQuantum field theory 606 $aString theory 606 $aElementary particles (Physics) 606 $aSuperconductivity 606 $aSuperconductors 606 $aQuantum Field Theories, String Theory$3https://scigraph.springernature.com/ontologies/product-market-codes/P19048 606 $aElementary Particles, Quantum Field Theory$3https://scigraph.springernature.com/ontologies/product-market-codes/P23029 606 $aStrongly Correlated Systems, Superconductivity$3https://scigraph.springernature.com/ontologies/product-market-codes/P25064 615 0$aQuantum field theory. 615 0$aString theory. 615 0$aElementary particles (Physics). 615 0$aSuperconductivity. 615 0$aSuperconductors. 615 14$aQuantum Field Theories, String Theory. 615 24$aElementary Particles, Quantum Field Theory. 615 24$aStrongly Correlated Systems, Superconductivity. 676 $a530.120151255 700 $aVescovi$b Edoardo$4aut$4http://id.loc.gov/vocabulary/relators/aut$0823612 906 $aBOOK 912 $a9910254601103321 996 $aPerturbative and Non-perturbative Approaches to String Sigma-Models in AdS$91832724 997 $aUNINA