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Helical Phase Inflation · Around

2014

Helical Phase Inflation

Li, Tianjun, Li, Zhijin, Nanopoulos, Dimitri V.

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We show that the quadratic inflation can be realized by the phase of a complex field with helicoid potential.

Remarkably, this helicoid potential can be simply realized in minimal supergravity.
The global $U(1)$ symmetry of the K\"ahler potential introduces a flat direction and evades the $\eta$ problem automatically.
So such inflation is technically natural.

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