Phase-space analysis of a quadratic dark energy model identifies stable attractors that approach the phantom divide asymptotically from both sides without crossing it.
Negative values ofηdrive the system toward stable phantom attractors (sinks), while positive values correspond to unstable repellers (sources) or saddle points in the phase space
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Phase-Space Analysis of Quadratic Dark Energy: Stable Attractors and Their Observational Signatures
Phase-space analysis of a quadratic dark energy model identifies stable attractors that approach the phantom divide asymptotically from both sides without crossing it.