Tides across thin-shells: differences between spacetimes with one and two asymptotic regions

EMILIO RUBIN DE CELIS; CLAUDIO SIMEONE

EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS

SPRINGER

Lugar: Berlin; Año: 2023 vol. 83

1434-6044

Traversability across thin shells is investigated, with special attention devoted to the difference in tides relatedwith different global properties of the geometries. While we have recently associated curvature jumps across infinitely thin shells to troublesome tides and consequent very restrictive conditions for a safe travel across a throat satisfying the flare-out condition in spacetimes with two asymptotic regions, now we find that analogous problems can be significantly reduced or even cancelled across shells joining an inner with an outer submanifold of spacetimes with one asymptotic region.We also showthat,within this framework, cylindrical shells present an advantage over spherical shells.