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Italian theoretical physicist
Augusto Sagnotti (born 1955) is an
Italian
theoretical physicist at
Scuola Normale (since 2005).
Biography
Sagnotti earned a
Laurea in Electrical Engineering from the
University of Rome "La Sapienza" in 1978 (advisors: Bruno Crosignani and Paolo Di Porto); and a 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).[
citation needed ]
Sagnotti was Junior Faculty at the
University of Rome "Tor Vergata" from 1986 to 1994, then Associate Professor (1994–99) and Professor (2000-2005).[
citation needed ] 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 .[
citation needed ]
Sagnotti's main contribution to physics is perhaps the analysis of the
2-loop divergences in Einstein's theory of
General Relativity .
[1]
[2] 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,
[3] with 32 half-
D9-branes added in the vacuum to cancel various
anomalies
[4]
[5] and offered the elucidation of the key properties of orientifold constructions and of Conformal Field Theory on non-orientable surfaces.
[6]
[7]
[8]
[9]
[10] He also discovered the
10D "0B' string" , including both
open and closed strings , non supersymmetric but free of
tachyons .
[11]
[12] He has worked extensively on higher spins, arriving at a geometric formulation of their free field equations in terms of higher-spin curvatures.
[13]
More recently, Sagnotti has been working on the proposal of a possible link between "
brane supersymmetry breaking ",
[14]
[15]
[16]
[17] and the onset of the
inflationary phase , and on the exploration of some of its possible imprints on the
CMB ,
[18] in particular, the proposal that the low value of the CMB quadrupole
[19] and a first peak for l ~5
[20] be a manifestation of the onset of the inflationary phase.
Awards and honors
Sagnotti received the
Carosio Prize from the University of Rome “La Sapienza” in 1979, a
Miller Fellowship from U.C. Berkeley in 1984, shared with Massimo Bianchi the 1994
SIGRAV Prize of the
Italian Society for General Relativity and Gravitation ,
[21] and received the
Margherita Hack Prize for Science in 2014 for his work on the quantization of gravity and a
Humboldt Research Award in 2018.
[22] He was also
Andrejewski Lecturer at Humboldt Universitat in Berlin in 1999.
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)
References
^
Goroff, M. H.; Sagnotti, A. (1985). "Quantum gravity at two loops".
Physics Letters B . 160 (1–3): 81.
Bibcode :
1985PhLB..160...81G .
doi :
10.1016/0370-2693(85)91470-4 .
^
Goroff, M. H.; Sagnotti, A. (1986). "The ultraviolet behavior of Einstein gravity".
Nuclear Physics B . 266 (3–4): 709.
Bibcode :
1986NuPhB.266..709G .
doi :
10.1016/0550-3213(86)90193-8 .
^
Sagnotti, A. (1988). "Open strings and their symmetry groups". In 't Hooft, G.; Jaffe, A.; Mack, G.; Mitter, P. K.; Stora, R. (eds.). Nonperturbative Quantum Field Theory .
Plenum Publishing Corporation . pp. 521–528.
arXiv :
hep-th/0208020 .
Bibcode :
2002hep.th....8020S .
^
Sagnotti, A. (1992). "A note on the Green–Schwarz mechanism in open-string theories".
Physics Letters B . 294 (2): 196–203.
arXiv :
hep-th/9210127 .
Bibcode :
1992PhLB..294..196S .
doi :
10.1016/0370-2693(92)90682-T .
S2CID
14528538 .
^
Angelantonj, C.; Sagnotti, A. (2002). "Open strings".
Physics Reports . 371 (376): 1–150.
arXiv :
hep-th/0204089 .
Bibcode :
2002PhR...371....1A .
doi :
10.1016/S0370-1573(02)00273-9 .
S2CID
119334893 .
^
Pradisi, G.; Sagnotti, A. (1989). "Open string orbifolds".
Physics Letters B . 216 (1–2): 59.
Bibcode :
1989PhLB..216...59P .
doi :
10.1016/0370-2693(89)91369-5 .
^
Bianchi, M.; Sagnotti, A. (1990). "On the systematics of open string theories".
Physics Letters B . 247 (4): 517.
Bibcode :
1990PhLB..247..517B .
doi :
10.1016/0370-2693(90)91894-H .
^
Bianchi, M.; Pradisi, G.; Sagnotti, A. (1992). "Toroidal compactification and symmetry breaking in open string theories".
Nuclear Physics B . 376 (2): 362.
Bibcode :
1992NuPhB.376..365B .
doi :
10.1016/0550-3213(92)90129-Y .
^
Fioravanti, D.; Pradisi, G.; Sagnotti, A. (1994). "Sewing constraints and non-orientable open strings".
Physics Letters B . 321 (4): 349–354.
arXiv :
hep-th/9311183 .
Bibcode :
1994PhLB..321..349F .
doi :
10.1016/0370-2693(94)90255-0 .
S2CID
15330492 .
^
Pradisi, Gianfranco; Sagnotti, Augusto; Stanev, Yassen S. (1996). "Completeness conditions for boundary operators in 2D conformal field theory".
Physics Letters B . 381 (1–3): 97–104.
arXiv :
hep-th/9603097 .
Bibcode :
1996PhLB..381...97P .
doi :
10.1016/0370-2693(96)00578-3 .
S2CID
119096336 .
^
Sagnotti, A. (1995). "Some properties of open-string theories".
arXiv :
hep-th/9509080 .
^
Sagnotti, A. (1997). "Surprises in open-string perturbation theory".
Nuclear Physics B: Proceedings Supplements . 56 (3): 332–343.
arXiv :
hep-th/9702093 .
Bibcode :
1997NuPhS..56..332S .
doi :
10.1016/S0920-5632(97)00344-7 .
S2CID
13867997 .
^
Francia, D.; Sagnotti, A. (2002). "Free geometric equations for higher spins".
Physics Letters B . 543 (3–4): 303.
arXiv :
hep-th/0207002 .
Bibcode :
2002PhLB..543..303F .
doi :
10.1016/S0370-2693(02)02449-8 .
S2CID
14912668 .
^
Sugimoto, S. (1999). "Anomaly cancellations in the type I D9-D9 system and the USp (32) string theory".
Progress of Theoretical Physics . 102 (3): 685–699.
arXiv :
hep-th/9905159 .
Bibcode :
1999PThPh.102..685S .
doi :
10.1143/PTP.102.685 .
S2CID
14476861 .
^
Antoniadis, I.; Dudas, E.; Sagnotti, A. (1999). "Brane supersymmetry breaking".
Physics Letters B . 464 (1–2): 38–45.
arXiv :
hep-th/9908023 .
Bibcode :
1999PhLB..464...38A .
doi :
10.1016/S0370-2693(99)01023-0 .
S2CID
16185036 .
^
Angelantonj, C. (2000). "Comments on open-string orbifolds with a non-vanishing B ab ".
Nuclear Physics B . 566 (1–2): 126–150.
arXiv :
hep-th/9908064 .
Bibcode :
2000NuPhB.566..126A .
doi :
10.1016/S0550-3213(99)00662-8 .
S2CID
15795436 .
^
Aldazabal, G.; Uranga, A. M. (1999). "Tachyon-free non-supersymmetric type IIB orientifolds via brane-antibrane systems".
Journal of High Energy Physics . 1999 (10): 24.
arXiv :
hep-th/9908072 .
Bibcode :
1999JHEP...10..024A .
doi :
10.1088/1126-6708/1999/10/024 .
S2CID
15612821 .
^
Kitazawa, N.; Sagnotti, A. (2014). "Pre-inflationary clues from string theory?".
Journal of Cosmology and Astroparticle Physics . 2014 (4): 17.
arXiv :
1402.1418 .
Bibcode :
2014JCAP...04..017K .
doi :
10.1088/1475-7516/2014/04/017 .
S2CID
119232246 .
^
Hu, W.
"Quadrupole types and polarization patterns" .
University of Chicago . Retrieved 2014-07-25 .
^
Abdalla, F. B.
"Observational cosmology: The CMB" (PDF) .
University College London . Retrieved 2014-07-26 .
^
"I Premi SIGRAV" . Archived from
the original on February 12, 2019. Retrieved March 18, 2021 .
^
"Von Humboldt Foundation Prizes awarded to Professor Ferrara and Professor Sagnotti" . Normale News . 9 January 2019. Retrieved 18 March 2021 .
External links
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