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Discrimination between inflaton potentials <br />
Lyth bound: <br />
Smaller r <br />
(i) Large-‐field inflation (e.g., chaotic inflation, 1983) <br />
During inflation <strong>the</strong> field evolves <br />
over <strong>the</strong> large-‐distance: <br />
<br />
(ii) Small-‐field inflation (e.g., natural inflation, 1990) <br />
During inflation <strong>the</strong> field evolves <br />
over <strong>the</strong> small-‐distance: <br />
A. Linde (young version) <br />
K. Freese <br />
(iii) Hybrid inflation (1994) <br />
Inflation ends due to <strong>the</strong> waterfall transition <br />
to <strong>the</strong> global minimum. <br />
A. Linde (current version)
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