A specially regularized hyperbolic field space in a two-field model allows a stable non-singular bounce that preserves the null energy condition, remains BKL-stable, and recovers exact Starobinsky predictions on all observable scales after pushing bounce features far beyond reach.
Astrophys.641, A10 (2020)
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Robust Non-Singular Bouncing Cosmology from Regularized Hyperbolic Field Space
A specially regularized hyperbolic field space in a two-field model allows a stable non-singular bounce that preserves the null energy condition, remains BKL-stable, and recovers exact Starobinsky predictions on all observable scales after pushing bounce features far beyond reach.