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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Augusto Sagnotti ： ウィキペディア英語版 Augusto Sagnotti Augusto Sagnotti (born 1955) is a Professor of Theoretical Physics at Scuola Normale (since 2005). Laurea in Electrical Engineering from the University of Rome "La Sapienza" in 1978 (advisors: Bruno Crosignani and Paolo Di Porto); and Ph.D. in Theoretical Physics from Caltech in 1983 (advisor: John H. Schwarz). He was Post-Doctoral Fellow at Caltech (1983–84) and Miller Research Fellow at U.C. Berkeley (1984–86). He was Junior Faculty at the University of Rome "Tor Vergata" from 1986 to 1994, then Associate Professor (1994–99) and Professor (2000-2005). He was also a visiting Professor at several international Institutions, including University of Brussels, CERN, DESY, UCLA, Princeton, Humboldt Universitat, University of Cambridge, University of Oxford, Ecole Normale Superieure, IHES, Ecole Polytechnique, UAM Madrid, U. Uppsala, U. Warsaw. His research activity has been devoted to the quantization of the gravitational field, to String Theory, to Conformal Field Theory and to Higher-Spin Gauge Fields. Sagnotti's main contribution to physics is perhaps the analysis of the 2-loop divergences in Einstein's theory of General Relativity.〔M.H. Goroff and A. Sagnotti, "Quantum Gravity At Two Loops", Phys. Lett. B160 (1985) 81,〕〔M.H. Goroff and A. Sagnotti, "The Ultraviolet Behavior Of Einstein Gravity", Nucl. Phys. B266 (1986) 709〕 Moreover, he was the first to propose, in 1987, that the type I string theory can be obtained as an orientifold of type IIB string theory,〔A. Sagnotti, "Open Strings and their Symmetry Groups", IN *CARGESE 1987, PROCEEDINGS, NONPERTURBATIVE QUANTUM FIELD THEORY * 521-528 AND ROME II UNIV. - ROM2F-87-025 (87,REC.MAR.88) 12p ()〕 with 32 half-D9-branes added in the vacuum to cancel various anomalies〔A. Sagnotti, "A Note on the Green-Schwarz mechanism in open string theories", Phys. Lett. B294 (1992) 196 ()〕〔C. Angelantonj and A. Sagnotti, "Open strings", ''Phys. Rept.'' 1 (339 ) (arXiv:hep-th/0204089 )〕 and offered the elucidation of the key properties of orientifold constructions and of Conformal Field Theory on non-orientable surfaces.〔G. Pradisi and A. Sagnotti, "Open String Orbifolds", Phys. Lett. B216 (1989) 59.〕〔M. Bianchi and A. Sagnotti, "On the systematics of open string theories", Phys. Lett. B247 (1990) 517〕〔M. Bianchi, G. Pradisi and A. Sagnotti, "Toroidal compactification and symmetry breaking in open string theories", Nucl. Phys. B376 (1992) 365.〕〔D. Fioravanti, G. Pradisi and A. Sagnotti, "Sewing constraints and nonorientable open strings" , Phys. Lett. B321 (1994) 349 ()〕〔G. Pradisi, A. Sagnotti and Y.S. Stanev, "Completeness conditions for boundary operators in 2-D conformal field theory," Phys. Lett. B381 (1996) 97 ()〕 He also discovered the 10D "0B' string", including both open and closed strings, non supersymmetric but free of tachyons.〔A. Sagnotti, "Some properties of open string theories", in *Palaiseau 1995, Susy 95 * 473-484 ().〕〔A. Sagnotti, "Surprises in open-string perturbation theory", Nucl. Phys. Proc. Suppl. 56B (1997) 332 ()〕 He has worked extensively on higher spins, arriving at a geometric formulation of their free field equations in terms of higher-spin curvatures.〔D. Francia and A. Sagnotti, "Free geometric equations for higher spins", Phys. Lett. B543 (2002) 303〕 More recently, Sagnotti has been working on the proposal of a possible link between "brane supersymmetry breaking",〔S. Sugimoto, "Anomaly cancellations in type I D9-D9-bar system and the USp(32) string theory", Prog. Theor. Phys. 102 (1999) 685 ()〕〔I. Antoniadis, E. Dudas and A. Sagnotti, "Brane supersymmetry breaking", Phys. Lett. B464 (1999) 38 ()〕〔C. Angelantonj, "Comments on open-string orbifolds with a non-vanishing B(ab)" Nucl. Phys. B566 (2000) 126 ()〕〔G. Aldazabal and A.M. Uranga, "Tachyon-free non-supersymmetric type IIB orientifolds via brane-antibrane systems", JHEP 9910 (1999) 024 ()〕 and the onset of the inflationary phase, and on the exploration of some of its possible imprints on the CMB, in particular, the proposal that the low value of the CMB quadrupole and a first peak for l ~5 be a manifestation of the onset of the inflationary phase. == Books == * "String Theory", eds. C. Procesi and A. Sagnotti (Academic Press, 1988) * "String Theory, Quantum Gravity and the Unification of the Fundamental Interactions", eds. M. Bianchi, F. Fucito, V. Marinari and A. Sagnotti (World Scientific, 1992) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Augusto Sagnotti」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.