Title: Soft-pion theorems for large-scale structure
Time: 2pm
Place: DRL 2N36
Abstract:
Consistency relations, which relate the squeezed limit of an N+1-point function to an N-point function, are extremely useful nonperturbative statements in cosmology and remain valid when the N-point function is deep in the nonlinear regime. In this talk I will discuss the derivation of these relations in conformal Newtonian gauge, with velocity potential playing the role of the soft pion; their robustness under astrophysical complications; and the connection to previously derived relations in zeta (unitary) gauge. As a byproduct of this investigation, I also discuss a simple fluid Lagrangian for large scale structure.
Date of event:
Mon, 2014-09-29 (All day)
