Scuola Normale Superiore

Closed string trajectories from a new “tiling”

A bstract Based on an efficient technology for the excavation of entire open string trajectories of physical states, we propose an algorithmic method of constructing the largely unknown closed string trajectories. Due to combinatorial complexity, the “double copy” of open strings...

Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity

ABSTRACT Thin dielectric films are known to show distinct colors, depending primarily on the film thickness. In the present article we show that a specialized thin film Fabry–Pérot resonator, that we name conductor–dielectric–conductor (CDC) matched cavity, appears grey when obse...

Parity‐Dependent THz Harmonic Generation in Electrically Pumped Micro‐Lasers Exploiting Topological Insulator–Metamaterial Gratings

The intersection of topological photonics and nonlinear optics provides new opportunities for compact, tunable light sources. Here, we demonstrate even and odd harmonic generation, in the 6-10 THz range, in electrically driven micro-lasers by integrating a set of different topolo...

A finite algebraic target theorem for Kreisel’s conjecture

Abstract Friedman’s Problem 34, attributed there to Kreisel, states that for Peano arithmetic formalized precisely as in Kleene, a uniform bound on the proof lengths of all numeral instances $$A(\bar{n})$$ A ( n ¯ ) entails the provability of the universal closure $$\forall x\,A(...

Barycentric Stability of Nonlocal Perimeters: the Convex Case

We establish a sharp form of a nonlocal quantitative isoperimetric inequality involving the barycentric asymmetry for convex sets. This result can be seen as the nonlocal analogue of the one obtained by B. Fuglede [Lower estimate of the isoperimetric deficit of convex domains in...

Mosco-Convergence of Convex Sets and Unilateral Problems for Differential Operators with Lower Order Terms Having Natural Growth

We study the stability of solutions to a class of variational inequalities posed on obstacle-type convex sets, under Mosco-convergence. Specifically, we consider problems of the form {u∈W01,p(Ω)∩L∞(Ω),u≥ψ in Ω,⟨A(u),v−u⟩+∫ΩH(x,u,Du)(v−u)≥0,∀ v∈W01,p(Ω)∩L∞(Ω),v≥ψ in Ω. Here, A is...

‘No war’ inside peace movements: alliance building in Madrid’s pro-Palestine networks

This article examines coalition-building within Madrid’s pro-Palestine movement since October 2023, shifting attention from cross-movement alliances to the endogenous dynamics that shape cooperation among solidarity actors. Drawing on 10 semi-structured interviews with key activi...

Every negative amphichiral knot is rationally slice

In 2009, Kawauchi proved that every strongly negative amphichiral knot is rationally slice. However, as shown by Hartley in 1980, there are examples of negative amphichiral knots that are not strongly negative amphichiral. In this paper, we prove that every negative amphichiral l...

Infinitary negative translations and Glivenko logic

Abstract We study infinitary intuitionistic logic by employing both syntactic and semantic methods. First, we introduce a natural deduction system for infinitary predicate logic and study some of its basic properties. We then extend neighbourhood semantics to this setting, provid...

A regularity theorem for stationary measures

Abstract We investigate a variational problem for eigenvalues of the Laplace-Beltrami operator on smooth manifolds with respect to Radon measures belonging to a suitable class; we are motivated by conformal eigenvalues in dimension two. Our main result is a regularity result for...

More on pre-inflationary non Gaussianities

Abstract I generalize the three-point amplitude of curvature perturbations in the climbing scenario inspired by ten-dimensional non-supersymmetric strings to a broader class of exponential potentials, under some assumptions on the smoothing effects of String Theory that favor a b...

“ We Are Not Freeing Palestine, Palestine Is Freeing Us ”: Intellectuals and the Anti-Colonial Framing of the Palestinian Solidarity Movement

This article examines the role of political, cultural, and institutional intellectuals in the discursive radicalization of the current wave of solidarity with Palestine in Spain. Drawing on Gramscian and decolonial traditions, we reconsider who becomes legible and constructed as...