34 citations · 62 across the 15 of their papers we have counts for
15 papers
The Art of Networking: Networks of Trivalent 10d Heterotic Junctions
Chiara Altavista, Edoardo Anastasi, Roberta Angius +2
We initiate the study of networks of 10d string theories connected by junctions implied by the cobordism conjecture. Focusing on the recently constructed junction of the three 10d…
Hodge Loci and Complex Multiplication via Generalized Symmetries in Calabi-Yau sigma models
Roberta Angius, Roberto Volpato
We propose a sigma-model analogue of Hodge loci in the moduli space of geometric Calabi-Yau compactifications, characterized by the emergence of non-trivial rational Hodge endomorp…
The Art of Branching: Cobordism Junctions of 10d String Theories
Chiara Altavista, Edoardo Anastasi, Roberta Angius +1
We describe the explicit construction of configurations of several 10d string theories joining at a 9d junction, providing a dynamical realization of cobordisms between multiple 10…
Non-invertible defects from the Conway SCFT to K3 sigma models II: duality and Fibonacci defects
Roberta Angius, Stefano Giaccari, Sarah M. Harrison +1
We continue the study, initiated in [hep-th:2504.18619], of topological defect lines (TDLs) in the Conway module and K3 non-linear sigma models (NLSMs). In the cas…
Towards a classification of topological defects in sigma models
Roberta Angius, Stefano Giaccari
Given a surface, a supersymmetric non-linear K3 sigma model is the internal superconformal field theory (SCFT) in a six dimensional compactification of type IIA superstring on…
Wall crossing structure from quantum phenomena to Feynman Integrals
Roberta Angius, Sergio Luigi Cacciatori, Anthony Massidda
A growing body of evidence suggests that the complexity of Feynman integrals is best understood through geometry. Recent mathematical developments [Kontsevich and Soibelman, arXiv:…
Non-invertible defects from the Conway SCFT to K3 sigma models I: general results
Roberta Angius, Stefano Giaccari, Sarah M. Harrison +1
We initiate the study of supersymmetry-preserving topological defect lines (TDLs) in the Conway moonshine module . We show that the tensor category of such defects,…
Relative Quantum Gravity: Localized Gravity and the Swampland
Edoardo Anastasi, Roberta Angius, Jesús Huertas +2
We perform a systematic study of the applicability of swampland constraints to theories of localized gravity. We find that these gravity theories can violate swampland constraints,…
End of the World Boundaries for Chiral Quantum Gravity Theories
Roberta Angius, Angel Maria Uranga, Chuying Wang
We describe the construction of large classes of explicit string theory backgrounds corresponding to 6d and 4d chiral theories with end of the world boundaries, and describe the st…
End of The World brane networks for infinite distance limits in CY moduli space
Roberta Angius
Dynamical Cobordism provides a powerful method to probe infinite distance limits in moduli/field spaces parameterized by scalars constrained by generic potentials, employing config…
Topological defects in K3 sigma models
Roberta Angius, Stefano Giaccari, Roberto Volpato
We consider the topological defect lines commuting with the spectral flow and the superconformal symmetry in two dimensional non-linear sigma models on K3. By s…
Intersecting End of the World Branes
Roberta Angius, Andriana Makridou, Angel M. Uranga
Dynamical cobordisms implement the swampland cobordism conjecture in the framework of effective field theory, realizing codimension 1 end of the world (ETW) branes as singularities…
Small Black Hole Explosions
Roberta Angius, Jesus Huertas, Angel M. Uranga
Small black holes are a powerful tool to explore infinite distances in moduli spaces. However, we show that in 4d theories with a scalar potential growing fast enough at infinity,…
Dynamical Cobordism and the Beginning of Time: Supercritical Strings and Tachyon Condensation
Roberta Angius, Matilda Delgado, Angel M. Uranga
We describe timelike linear dilaton backgrounds of supercritical string theories as time-dependent Dynamical Cobordisms in string theory, with their spacelike singularity as a boun…
At the End of the World: Local Dynamical Cobordism
Roberta Angius, José Calderón-Infante, Matilda Delgado +2
The Cobordism Conjecture states that any Quantum Gravity configuration admits, at topological level, a boundary ending spacetime. We study the dynamical realization of cobordism, a…