3 papers
hep-th2026
Superfluid memory effect
Kristan Jensen, Alfredo Pérez, Stefan Prohazka
We identify a memory effect produced by phonon scattering in a superfluid: a localized scattering event generates a far-field pressure pulse with vanishing time integral but a nonz…
hep-th2025
Planons and their Carroll-Galilei symmetries
José Figueroa-O'Farrill, Simon Pekar, Alfredo Pérez +1
We study the dynamics of planons, particles whose mobility is restricted to a plane, through the classification of coadjoint orbits and unitary irreducible representations of the c…
hep-th2024
Cartan-like formulation of electric Carrollian gravity
Simon Pekar, Alfredo Pérez, Patricio Salgado-Rebolledo
We present a Cartan-like first-order action principle for electric Carrollian gravity. The action is invariant under the local homogeneous Carroll group, albeit in a different repr…