Non-singular cosmologies matching regular black holes

Abstract

We construct a new non-singular cosmological model matched to a Minkowski-core regular black hole by means of a modified Oppenheimer--Snyder framework. Its dynamics is studied in both dust-only and scalar-field scenarios, and compared with that of two other non-singular models as well as the classical standard cosmology. The results show that, although all three non-singular cosmologies share identical late-time behavior and allow for a natural embedding of inflation in the scalar-field setting, they exhibit qualitatively distinct non-singular features at very early times. In particular, the new cosmology approaches Minkowski spacetime in the limits of both the infinite past and the infinite future, thereby manifesting an intriguing symmetry between the two asymptotic regimes.