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Motivated by the gauge theory of gravity with local scaling symmetry proposedrecently in 1712.04537 and 1506.01807, we investigate whether the scalar fieldtherein can be responsible for the inflation. We show that the classical theorywould suffer from the difficulty that inflation can start but will never stop.We explore possible solutions by invoking the symmetry breaking through quantumeffects. The effective potential of the scalar field is shown to havephenomenologically interesting forms to give viable inflation models. Thepredictions of physical observables agree well with current cosmologicalmeasurements and can be further tested in future experiments searching forprimordial gravitational waves.

Inflation in gauge theory of gravity with local scaling symmetry and quantum induced symmetry breaking