We study the scattering of the φ 8 kinks off each other, namely, we consider those φ 8 kinks
that have power-law asymptotics. The slow power-law fall-off leads to a long-range …

Abstract We consider the (1+ 1)-dimensional Lorentz-symmetric field-theoretic model with
logarithmic potential having a Mexican-hat form with two local minima similar to that of the …

The false vacua of some potentials do not decay via Euclidean bounces. This typically
happens for tunneling actions with a flat direction (in field configuration space) that is lifted …

Some false vacua do not decay via bounces. This usually happens when a flat direction of
the tunneling action due to scale invariance is lifted to a sloping valley by a scale breaking …

Using the renormalization group improvement technique, we study the effective potential of
a model consisting of N scalar fields ϕ i transforming in the fundamental representation of an …

The metastable dark energy scenario is revisited by assuming that the current false vacuum
energy density is the remnant from a primeval inflationary stage. The zero temperature …

We investigate analytically and numerically the stability of bubble-like fluxons in disk-shaped
heterogeneous Josephson junctions. Using ring solitons as a model of bubble fluxons in the …

A bstract Localised heterogeneities have been recently discovered to act as bubble-
nucleation sites in nonlinear field theories. Vacuum decay seeded by black holes is one of …

Bubble universes and traversable wormholes in general relativity can be realized as two
sides of the same concept. To exemplify it, we find, display, and study in a unified manner a …

In a previous paper (JCAP06, 033, 2018), we have proved that it is possible to have a stable
false vacuum in a potential that is unbounded from below. In this paper, we discuss the …