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Valentina Bevilacqua (Istituto Nazionale di Fisica Nucleare)25/05/2026, 18:00
The poster describes the effect of introducing open string degrees of freedom (scalars and fluxes) associated with spacetime-filling branes/orientifold planes in dimensional reductions of massive type IIA supergravity on a 3-sphere with warping. The corresponding supergravity description in 7 dimensions needs extra vector multiplets coupled to the gravity multiplet and new embedding tensor...
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Riccardo Giordana Pozzi (Istituto Nazionale di Fisica Nucleare)25/05/2026, 18:00
Exploiting the analytic properties of the scattering amplitude, we provide an alternative but equivalent definition of the standard Mellin transform used to obtain celestial correlation functions. From this representation, we identify a celestial dispersion relation that relates the reduced correlation function to the poles and discontinuities of the bulk amplitude. By drawing an analogy with...
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Elisa Grilli (Istituto Nazionale di Fisica Nucleare)25/05/2026, 18:00
We investigate the dynamics and radiation of electrically charged black hole binaries within the post-Newtonian (PN) framework. We derive the conservative dynamics up to second post-Newtonian (2PN) order from a harmonic-coordinate Lagrangian incorporating both gravitational and electromagnetic interactions, and we compute the leading dissipative effects induced by charge. Furthermore, we...
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Francesca Pacifico (Università di Napoli Federico II)25/05/2026, 18:00
The AdS/CFT correspondence provides us with the best working example of the holographic principle. The holographic principle is used to study quantum gravity observables living on the conformal boundary of space-time. For example, this has been applied in the AdS/CFT correspondence, where we studied that quantum gravity observables on the boundary of (d+1)-dimensional AdS space are equivalent...
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Gianmarco Esposto (Università di Padova)25/05/2026, 18:00
We study the gravitational origin of the logarithmic term arising in the superconformal index of four-dimensional $\mathcal{N}=1$ SCFTs, both in the Cardy-like limit and in the large-$N$ limit, focusing on its interpretation in terms of discrete symmetries and saddle degeneracy. On the field-theory side, this contribution is associated with the spontaneous breaking of an electric...
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Matteo Orso (Università di Pisa)25/05/2026, 18:00
Several simple asymptotically free chiral gauge theories are studied. The only “free parameters” of our models are the choice of the gauge group and the representations of the matter Weyl fermions,and the relative magnitudes of the renormalization-group (RG) energy scales $Λ_{i}$ associated with each gauge group. Equivalently, they can be chosen as small gauge coupling constants at an...
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Federico Arrighi (Leibniz Universität Hannover)25/05/2026, 18:00
We revisit the one-loop logarithmic corrections to the partition function in 11-dimensional supergravity on $AdS_4 \times S^7$, providing a systematic lower-dimensional framework for precision holography. Starting from the 11d partition function, we perform a complete spherical harmonic decomposition of the supergravity field content on the internal manifold $S^7$, thus reducing the 11d...
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Lihan Guo (UCSC & KU Leuven & INFN-PG)25/05/2026, 18:00
In the thin wall approximation, we study a class of asymptotically AdS black holes which contain a spherically symmetric vacuum bubble with a different (positive or negative) cosmological constant. Collapsing, expanding, and static bubble solutions are considered. Among these, expanding bubbles with positive cosmological constant can provide a way to apply the AdS/CFT correspondence to...
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Alessandro Brolis (University of Milano-Bicocca)25/05/2026, 18:00
Line defects pose a fundamental challenge for dualities in gauge theories. While it is known that field theories with radically different gauge groups can be dual at low energies, it is not yet fully understood how the presence of a line defect in one theory maps in the dual description. This conundrum was partially solved in the case of 3d theories with N=4 supersymmetry related by mirror...
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Bruno Bucciotti (Scuola Normale Superiore di Pisa)25/05/2026, 18:00
String theory scattering amplitudes exhibit remarkable properties, most notably their ultraviolet softness, easily explained from a worldsheet perspective. From a target space perspective, these features arise from the infinite tower of massive excitations organized into Regge trajectories. Despite this rich structure, string amplitudes are not known in closed form beyond a few low-lying...
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Luca Novelli (University of Bonn)25/05/2026, 18:00
Six dimensional $\mathcal{N}=(1,0)$ supergravity features BPS strings whose properties encode highly nontrivial information about the parent 6d theory. We focus on a distinguished set of theories whose string charge lattice is one-dimensional. In geometric theories, the generator of the lattice arises from a D3 brane wrapping the hyperplane class in $\mathbb{P}^2$. This hyperplane string is...
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Sante Ruggieri (Università degli Studi Milano-Bicocca. INFN, Section of Milano-Bicocca)25/05/2026, 18:00
Supersymmetric localization is a powerful technique to get exact results from the path integral of a supersymmetric field theories defined on a compact manifold [1,2,3]. Localization relies on the definition of supersymmetric theories in curved space, which need to preserve part of the original supersymmetry existing in flat space. In the relativistic case, this problem was systematically...
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Riccardo Giordana Pozzi (Istituto Nazionale di Fisica Nucleare)25/05/2026, 18:00
We study universal features of defect correlation functions in supersymmetric defect CFTs, focusing on four-point functions of the displacement supermultiplet. By perturbing the leading-order correlators at strong coupling, we derive constraints that identify the operators exchanged at next-to-leading order. From this, we determine the conditions under which four-point functions of defect...
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