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Alvaro Herraez08/07/2025, 13:30
In this talk, we will explore the structure of EFTs within the context of Quantum Gravity, using string theory as a laboratory. Using an amplitudes-based approach, we argue that any EFT describing Quantum Gravity should exhibit a double expansion for higher-curvature operators, which includes terms supressed with respect to the Einstein-Hilbert term by either the mass of the lightest tower of...
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Matilda Delgado08/07/2025, 13:48
I will outline how large classical BPS black hole solutions which feature an attractor mechanism can be used to probe large distances in moduli space at the horizon. I will show how these classical 2-derivative solutions seem to know about UV scales such as the species scale and the KK scale, in contrast with standard ``EFT'' reasoning. I will then explain that this is possible only because of...
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Chuying Wang08/07/2025, 14:06
Chirality provides a powerful topological tool to study the cobordism conjecture, which states that any theory of quantum gravity should admit end of the world (ETW) boundaries of spacetime. I discuss two realizations of this idea: First, I consider explicit 6d and 4d string theory models realizing gravity theories with chiral matter content, and construct explicit ETW boundaries which gap the...
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Ignacio Ruiz08/07/2025, 14:24
Using type IIB 9d gauged supergravities as an example, I will discuss how non-trivial topology plays a crucial role in bordisms to nothing or to other gauged supergravities, by allowing monodromies along its 1-cycles, which reduces the number of bordism defects that naively one would have needed. I will then explain how a property of the duality group, in this case SL(2,Z), known as commutator...
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Alessandra Grieco08/07/2025, 14:42
The bottom-up origin of the Swampland Distance Conjecture (SDC) and its relation to string dualities remains an open puzzle. In 4d 𝑁 = 1 N=1 theories, the existence of ½-BPS EFT string solutions provides a bottom-up realization of these infinite distance limits. In this presentation, I will explore an intriguing integer scaling relation between EFT strings becoming asymptotically tensionless,...
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Sebastian Rauch08/07/2025, 15:30
The Weak Gravity Conjecture and its various refinements form a cornerstone of the swampland program. While many examples satisfy the Lattice Weak Gravity Conjecture (LWGC), where a superextremal state is present at every site of the charge lattice, there are exceptional examples where only a (finite index) sublattice of superextremal states are present. Following my recent work 2502.14951, we...
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Leonardo Bersigotti08/07/2025, 15:48
We investigate the relation between the existence of extra dimensions and the scale at which supersymmetry is expected to break down, linking it to the threshold at which the Effective Field Theory description becomes invalid. We use the Gravitino Conjecture(GC) to make predictions on the number and the size of extra dimensions based on the value of the gravitino mass, ensuring our results...
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Bjoern Friedrich08/07/2025, 16:06
It has been speculated that de Sitter space is problematic in quantum gravity due to the presence of cosmological horizons. By considering spacetimes with dynamical boundaries, we argue that if a swampland criterion related to horizons can be formulated, it has to go beyond simply demanding the absence of cosmological horizons. We formulate an appropriate condition and analyze its consequences...
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Thomas Raml08/07/2025, 16:24
"A notion of distance on the moduli space of low-energy effective field theories is crucial for the Swampland program, and specifically for the Distance Conjecture. In this talk, I will show how geometric flow equations, and in particular generalizations of the Ricci flow, offer a different and elegant viewpoint in the more general case of a scalar field space with potential. After a brief...
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Guoen Nian08/07/2025, 16:42
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Antonia Paraskevopoulou10/07/2025, 13:30
The M-theoretic emergence proposal claims that in an isotropic decompactification limit to M-theory the full effective action is generated via quantum effects by integrating out only the light towers of states of the theory. In the BPS particle sector, these include transversally wrapped M2- and M5-branes possibly carrying Kaluza-Klein momentum. A longitudinally wrapped M5-brane, i.e. a...
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Lorenzo Paoloni10/07/2025, 13:48
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Gonzalo F. Casas10/07/2025, 14:06
In 4D supersymmetric quantum gravity, moduli-dependent species scales imply a field-dependent cutoff. We show that in GKP-like no-scale vacua, this leads to one-loop, positive-definite potentials with Minkowski minima at “desert points” ($z_i \sim \mathcal{O}(1)$). The potential exhibits a dS maximum and asymptotic runaway, aligning with Swampland constraints. This mechanism may stabilize...
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Alessandro Mininno10/07/2025, 14:24
We recently proposed a version of the Weak Gravity Conjecture that applies to AdS spacetime. We find that the condition on the charge-to-mass ratio of a charged particle in AdS spacetime is corrected compared to the one in Minkowski spacetime by contributions that depends on the AdS scale and the horizon radius of the extremal Reissner–Nordström black hole charged under the same gauge theory....
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Muldrow Etheredge10/07/2025, 14:42
I consider flat slices of moduli space where (−∇logT)-vectors of particle-towers and branes are constant, and I show that the Emergent String Conjecture constrains these vectors to reside on lattices. I further identify conditions that determine whether a given lattice site must be populated, and I show that only a finite set of configurations satisfies these conditions. I classify all such...
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Jeroen Monnee10/07/2025, 15:30
We discuss the realization of the Emergent String Conjecture in certain infinite distance limits in the vector multiplet moduli space of Type IIB compactifications on Calabi-Yau threefolds. We establish the existence of a critical tensionless string corresponding to a heterotic string on T^2 x K3, in limits of type IIb that correspond to so-called Tyurin degenerations. We do so by combining...
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Christian Aoufia10/07/2025, 15:48
The species cutoff is a moduli-dependent quantity signaling the onset of quantum gravitational phenomena, whose form can be oftentimes determined from higher-derivative and higher-curvature corrections within low-energy gravitational EFTs. In this work, we point out that these Wilson coefficients are eigenfunctions of an appropriate second-order elliptic operator defined over moduli space in...
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Gregory Loges10/07/2025, 16:06
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Lukas Kaufmann10/07/2025, 16:24
Using supergravity string probes, we study infinite distance boundaries in the vector multiplet moduli space of 5d N=1 supergravities. By imposing consistency of their worldsheet theories, we derive several constraints on the 5d Chern-Simons couplings, including their non-negativity. These constraints allow us to classify all infinite distance limits without having to assume any geometric...
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10/07/2025, 16:41
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