Interacting dark energy with CPL admits exact solutions via incomplete gamma functions; Q proportional to dark energy density modestly improves AIC fit but BIC prefers LambdaCDM, showing phantom-to-quintessence transition and possible future transient acceleration.
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New cosmological data mildly favor a small coupling between dark matter and a scalar dark energy field at |β| ≈ 0.03 while allowing an effective phantom-crossing equation of state.
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Cosmological evolution of interacting dark energy with a CPL equation of state
Interacting dark energy with CPL admits exact solutions via incomplete gamma functions; Q proportional to dark energy density modestly improves AIC fit but BIC prefers LambdaCDM, showing phantom-to-quintessence transition and possible future transient acceleration.
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Constraints on Coupled Dark Energy in the DESI Era
New cosmological data mildly favor a small coupling between dark matter and a scalar dark energy field at |β| ≈ 0.03 while allowing an effective phantom-crossing equation of state.