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2020

Multi-field inflation and preheating in asymmetric $\alpha$-attractors

Iarygina, Oksana, Sfakianakis, Evangelos I., Wang, Dong-Gang et al.

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We analyze and compare the multi-field dynamics during inflation and preheating in symmetric and asymmetric models of $\alpha$-attractors, characterized by a hyperbolic field-space manifold.

We show that the generalized (asymmetric) E- and (symmetric) T-models exhibit identical two-field dynamics during inflation for a wide range of initial conditions.
The resulting motion can be decomposed in two approximately single-field segments connected by a sharp turn in field-space.
The details of preheating can nevertheless be different.

Multi-field inflation and preheating in asymmetric $\alpha$-attractors · Around

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