An exponential f(Q) gravity model, a small perturbation of ΛCDM, gives quintessence for one sign of its parameter b and phantom behavior for the other, while changing late-time structure growth.
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Analysis of the cosmological evolution parameters, energy conditions, and linear matter perturbations of an exponential-type model in $f(Q)$ gravity
An exponential f(Q) gravity model, a small perturbation of ΛCDM, gives quintessence for one sign of its parameter b and phantom behavior for the other, while changing late-time structure growth.