Superfluid Rayleigh–Plesset extension of FLRW cosmology

Guided by the analogy with Rayleigh–Plesset dynamics of multielectron bubbles in superfluid He-4, we consider cosmological FLRW evolution equation additional cubic and sixth powers inverse scale factor universe. For barotropic parameter w=2∕3 (coasting universe), along zero constant absence viscous terms, using Sundman time as parameter, present parametric solutions for universe terms rational expressions Weierstrass elliptic functions their particular cases thereof. other values state w, such w=−1, but also same coasting case, a more standard discussion conformal variable obtained numerical integration.