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CERN Document Server Znaleziono 86 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 1.26 sekund. 
1.
Local Operator Algebras of Charged States in Gauge Theory and Gravity / Grassi, Pietro Antonio (CERN ; INFN, Turin ; Piemonte Orientale U., Alessandria) ; Porrati, Massimo (New York U., CCPP)
Powerful techniques have been developed in quantum field theory that employ algebras of local operators, yet local operators cannot create physical charged states in gauge theory or physical nonzero-energy states in perturbative quantum gravity. [...]
arXiv:2411.08865. - 33.
Fulltext
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2.
Properties of Dual Supertranslation Charges in Asymptotically Flat Spacetimes / Kol, Uri (New York U., CCPP) ; Porrati, Massimo (New York U., CCPP ; CERN)
We study several properties of some new charges of asymptotically flat spacetimes. These dual supertranslation charges are akin to the magnetic large $U(1)$ charges in QED. [...]
arXiv:1907.00990; CERN-TH-2019-069.- 2019-08-29 - 19 p. - Published in : Phys. Rev. D 100 (2019) 046019 Article from SCOAP3: 7dd201e51cc8dc3855c205d85f2d61aa - PDF; scoap3-fulltext - PDF; Fulltext: PDF;
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3.
Comments on Nonlinear Sigma Models Coupled to Supergravity / Ferrara, Sergio (CERN ; Frascati ; UCLA) ; Porrati, Massimo (New York U. ; New York U., CCPP)
N=1, D=4 non linear sigma models, parametrized by chiral superfields, usually describe Kaehlerian geometries, provided that Einstein frame supergravity is used. The sigma model metric is no longer Kaehler when local supersymmetry becomes nonlinearly realized through the nilpotency of the supergravity auxiliary fields. [...]
arXiv:1707.09273; CERN-TH-2017-164.- 2017-12-10 - 3 p. - Published in : Phys. Lett. B 775 (2017) 361-363 Article from SCOAP3: PDF; Fulltext: PDF;
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4.
On a Canonical Quantization of 3D Anti de Sitter Pure Gravity / Kim, Jihun (New York U. ; New York U., CCPP) ; Porrati, Massimo (New York U. ; CERN ; New York U., CCPP)
We perform a canonical quantization of pure gravity on AdS3 using as a technical tool its equivalence at the classical level with a Chern-Simons theory with gauge group SL(2,R)xSL(2,R). We first quantize the theory canonically on an asymptotically AdS space --which is topologically the real line times a Riemann surface with one connected boundary. [...]
arXiv:1508.03638; CERN-PH-TH-2015-188; CERN-PH-TH-2015-188.- Geneva : CERN, 2015-10-14 - 63 p. - Published in : JHEP 10 (2015) 096 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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5.
Scale invariant Volkov–Akulov supergravity / Ferrara, S. (CERN ; Frascati ; UCLA) ; Porrati, M. (CERN ; New York U., CCPP) ; Sagnotti, A. (CERN ; INFN, Pisa)
A scale invariant Goldstino theory coupled to Supergravity is obtained as a standard supergravity dual of a rigidly scale invariant higher--curvature Supergravity with a nilpotent chiral scalar curvature. The bosonic part of this theory describes a massless scalaron and a massive axion in a de Sitter Universe..
arXiv:1508.02939; CERN-PH-TH-2015-193.- Geneva : CERN, 2015-09-02 - 3 p. - Published in : Phys. Lett. B 749 (2015) 589-591 Article from SCOAP3: PDF; Fulltext: PDF; External link: Preprint
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6.
Effective Planck Mass and the Scale of Inflation / Kleban, Matthew (New York U., CCPP) ; Mirbabayi, Mehrdad (Princeton, Inst. Advanced Study) ; Porrati, Massimo (New York U., CCPP ; CERN)
A recent paper argued that it is not possible to infer the energy scale of inflation from the amplitude of tensor fluctuations in the Cosmic Microwave Background, because the usual connection is substantially altered if there are a large number of universally coupled fields present during inflation, with mass less than the inflationary Hubble scale. We give a simple argument demonstrating that this is incorrect..
arXiv:1508.01527; CERN-PH-TH-2015-187; CERN-PH-TH-2015-187.- Geneva : CERN, 2016-01-11 - 4 p. - Published in : JCAP 01 (2016) 017 Article from SCOAP3: PDF; Fulltext: 10.1088_1475-7516_2016_01_017 - PDF; arXiv:1508.01527 - PDF; IOP Open Access article: PDF; External link: Preprint
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7.
${\cal R}^2$ Supergravity / Ferrara, Sergio (UCLA ; CERN ; Frascati) ; Kehagias, Alex (Natl. Tech. U., Athens) ; Porrati, Massimo (CERN ; New York U., CCPP)
We formulate $R^2$ pure supergravity as a scale invariant theory built only in terms of superfields describing the geometry of curved superspace. The standard supergravity duals are obtained in both "old" and "new" minimal formulations of auxiliary fields. [...]
arXiv:1506.01566; CERN-PH-TH-2015-130; CERN-PH-TH-2015-130.- Geneva : CERN, 2015-08-03 - 12 p. - Published in : JHEP 08 (2015) 001 Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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8.
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An Identity Crisis for Strings on AdS3 and its Resolution / PORRATI, Massimo (speaker)
2015 - 2702. Conferences & Workshops; Bruno Zumino Memorial meeting External links: Talk details; Event details In : Bruno Zumino Memorial meeting
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9.
Generalized Born--Infeld Actions and Projective Cubic Curves / Ferrara, S. (CERN ; Frascati) ; Porrati, M. (New York U., CCPP ; New York U.) ; Sagnotti, A. (CERN) ; Stora, R. (CERN ; Annecy, LAPTH) ; Yeranyan, A. (Enrico Fermi Ctr., Rome ; Frascati)
We investigate $U(1)^{\,n}$ supersymmetric Born-Infeld Lagrangians with a second non-linearly realized supersymmetry. The resulting non-linear structure is more complex than the square root present in the standard Born-Infeld action, and nonetheless the quadratic constraints determining these models can be solved exactly in all cases containing three vector multiplets. [...]
arXiv:1412.3337; CERN-PH-TH-2014-250; CERN-PH-TH-2014-250.- 2015 - 9 p. - Published in : Fortschr. Phys. 63 (2015) 189-197 Fulltext: PDF; External link: Preprint
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10.
N=2 Born-Infeld Attractors / Ferrara, S. (CERN ; Frascati) ; Porrati, M. (New York U., CCPP) ; Sagnotti, A. (CERN)
We derive new types of $U(1)^n$ Born-Infeld actions based on N=2 special geometry in four dimensions. As in the single vector multiplet (n=1) case, the non--linear actions originate, in a particular limit, from quadratic expressions in the Maxwell fields. [...]
arXiv:1411.4954; CERN-PH-TH-2014-228; CERN-PH-TH-2014-228.- 2014-12-09 - 16 p. - Published in : JHEP 12 (2014) 065 Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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CERN Document Server : Znaleziono 86 rekordów   1 - 10następnykoniec  skocz do rekordu:
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132 PORRATI, Massimo
23 Porrati, M
132 Porrati, Massimo
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