Alberto Castellano

activity

20232026

most citedA Universal Pattern in Quantum Gravity at Infinite Distance

1 citations · 4 across the 8 of their papers we have counts for

collaborators

Showing 2026Show all

4 papers · 1 filter

hep-th2026

Complex Worldline Instantons in (Anti-)de Sitter Space

Alberto Castellano, Jinwei Chu, Eliseu Kloster +1

We study complex saddle points of the worldline path integral for massive charged particles in two-dimensional maximally symmetric backgrounds threaded by homogeneous electric fiel…

hep-th2026

How to (Non-)Perturb a BPS Black Hole

Alberto Castellano, Matteo Zatti

We relate the structure of non-perturbative corrections to BPS black hole observables in flat-spacetime theories with certain properties of probe charged particles in the near-hori…

hep-th2026

Exact Path Integral Methods in Supersymmetric $AdS_{2} \times S^{2}$ Backgrounds

Alberto Castellano, Carmine Montella, Matteo Zatti

We determine the exact functional determinants of charged, massive spin-0 and spin- $\frac{1}{2}$ particles in $AdS_{2} \times S^{2}$ backgrounds threaded by constant electri…

hep-th2026

Curvature divergences and gravity decoupling in Calabi--Yau rigid limits

Alberto Castellano, Fernando Marchesano, Lorenzo Paoloni

Four-dimensional $N = 2$ supergravity theories become rigid in gravity-decoupling limits. We study this effect for type II string compactifications on general Calabi--Yau m…

Complex Worldline Instantons in (Anti-)de Sitter Space

How to (Non-)Perturb a BPS Black Hole

Exact Path Integral Methods in Supersymmetric AdS2​×S2 Backgrounds

Curvature divergences and gravity decoupling in Calabi--Yau rigid limits

Exact Path Integral Methods in Supersymmetric $AdS_{2} \times S^{2}$ Backgrounds