Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Roberto Volpato"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-82 (2024)
Abstract We consider the topological defect lines commuting with the spectral flow and the N $$ \mathcal{N} $$ = (4, 4) superconformal symmetry in two dimensional non-linear sigma models on K3. By studying their fusion with boundary states, we derive
Externí odkaz:
https://doaj.org/article/805896bba2ba4447a1fd8d196ba2b8a2
Autor:
Stefano Giaccari, Roberto Volpato
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 1, Pp 1-62 (2023)
Abstract In quantum field theory, an orbifold is a way to obtain a new theory from an old one by gauging a finite global symmetry. This definition of orbifold does not make sense for quantum gravity theories, that admit (conjecturally) no global symm
Externí odkaz:
https://doaj.org/article/4e805932eb6b4ca2ac5b044a1d30fe9b
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 2, Pp 1-48 (2021)
Abstract We study some special features of F 24, the holomorphic c = 12 superconformal field theory (SCFT) given by 24 chiral free fermions. We construct eight different Lie superalgebras of “physical” states of a chiral superstring compactified
Externí odkaz:
https://doaj.org/article/7c88d63c262f4d75bed6674275770e57
Autor:
Roberto Volpato
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-54 (2019)
Abstract We consider two dimensional N $$ \mathcal{N} $$ = (4, 4) superconformal field theories in the moduli space of symmetric orbifolds of K3. We complete a classification of the discrete groups of symmetries of these models, conditional to a seri
Externí odkaz:
https://doaj.org/article/5449e60f28cb4454a14174b0087fe210
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 10, Pp 1-10 (2017)
Abstract We consider the spectrum of BPS states of the heterotic sigma model with (0, 8) supersymmetry and T 8 target, as well as its second-quantized counterpart. We show that the counting function for such states is intimately related to Borcherds
Externí odkaz:
https://doaj.org/article/d3500b6fed5d43639923b3b2d2a4aa48
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 5, Pp 1-78 (2017)
Abstract We determine the generating functions of 1/4 BPS dyons in a class of 4d N $$ \mathcal{N} $$ = 4 string vacua arising as CHL orbifolds of K3 × T 2, a classification of which has been recently completed. We show that all such generating funct
Externí odkaz:
https://doaj.org/article/c0326de2b385411988b8c8f22accb1e1
Autor:
Stefano Giaccari, Roberto Volpato
Publikováno v:
Journal of High Energy Physics
In quantum field theory, an orbifold is a way to obtain a new theory from an old one by gauging a finite global symmetry. This definition of orbifold does not make sense for quantum gravity theories, that admit (conjecturally) no global symmetries. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58a0f1d19b0a11694a55c10f0a8320d2
Publikováno v:
Progress of Theoretical and Experimental Physics, 2021(8):08B102. Oxford University Press
We propose a correspondence between vertex operator superalgebras and families of sigma models in which the two structures are related by symmetry properties and a certain reflection procedure. The existence of such a correspondence is motivated by p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71232f864e8ca222fe49f76693da52ae
https://dare.uva.nl/personal/pure/en/publications/vertex-operator-superalgebrasigma-model-correspondences(508145cd-0a44-42bf-9006-03ed58a80527).html
https://dare.uva.nl/personal/pure/en/publications/vertex-operator-superalgebrasigma-model-correspondences(508145cd-0a44-42bf-9006-03ed58a80527).html
We discuss a set of heterotic and type II string theory compactifications to 1+1 dimensions that are characterized by factorized internal worldsheet CFTs of the form $V_1\otimes \bar V_2$, where $V_1, V_2$ are self-dual (super) vertex operator algebr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a40d6d652c61d9ac914c0e36ba2abde6
http://arxiv.org/abs/2107.03507
http://arxiv.org/abs/2107.03507
We construct a Borcherds Kac-Moody (BKM) superalgebra on which the Conway group Co$_0$ acts faithfully. We show that the BKM algebra is generated by the BRST-closed states in a chiral superstring theory. We use this construction to produce denominato
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7995aff7eb59dba8250e6563ff7b1ed7
http://hdl.handle.net/11577/3328108
http://hdl.handle.net/11577/3328108