Non-minimally coupled inflation

Non-minimally coupled inflation is an inflationary model in which the constant which couples gravity to the inflaton field is not small. The coupling constant is usually represented by $\xi$ (Xi), which features in the action (constructed by modifying the Einstein–Hilbert action):^[1]

$S=\int d^{4}x{\sqrt {-g}}\left[{m_{P}^{2} \over 2}R-{1 \over 2}\partial ^{{\mu }}\phi \partial _{{\mu }}\phi -V(\phi )-{\xi \over 2}R\phi ^{2}\right]$

$\xi$ represents the strength of the interaction between $R$ and $\phi$ , which relate to the curvature of space and the magnitude of the inflaton field respectively.

References

↑ Hertzberg (2010-02-16), p. 1–2

Bibliography

Hertzberg, Mark P (2010). "On Inflation with Non-minimal Coupling". arXiv:1002.2995.

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