2013-01-28

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Speaker:       Jonathan White (Kyoto University)
Speaker: Jonathan White (Kyoto University)

Title:		Curvature perturbation in multi-field inflation with non-minimal coupling
Title: Curvature perturbation in multi-field inflation with non-minimal coupling

Abstract:	        We consider the curvature perturbation resulting from multi-field inflation models 
			in which potentially all fields are non-minimally coupled to the Ricci Scalar.  
			We confirm that, unlike in the single field case, the curvature perturbations 
			associated with the Jordan and Einstein frames are not the same, and that 
			the difference is a direct consequence of the isocurvature perturbations 
			inherent to multi-field models.  Using the dN formalism, and focusing on 
			analytically soluble examples, we see how the statistical properties of the two 
			curvature perturbations are also not necessarily the same, but confirm that 
			equivalence is recovered in the adiabatic limit.
Abstract: We consider the curvature perturbation resulting from multi-field inflation models 
in which potentially all fields are non-minimally coupled to the Ricci Scalar.  
We confirm that, unlike in the single field case, the curvature perturbations 
associated with the Jordan and Einstein frames are not the same, and that 
the difference is a direct consequence of the isocurvature perturbations 
inherent to multi-field models.  Using the dN formalism, and focusing on 
analytically soluble examples, we see how the statistical properties of the two 
curvature perturbations are also not necessarily the same, but confirm that 
equivalence is recovered in the adiabatic limit.