Nonlinear E-mode clustering in Lagrangian space.

We study the nonlinear E-mode clustering in Lagrangian space by using large scale structure N-body simulations and use the displacement field information in Lagrangian space to recover the primordial linear density field. We find that, compared to Eulerian nonlinear density fields, the E-mode displacement fields in Lagrangian space improves the cross-correlation scale k with initial density field by a factor of 6-7, containing 2 orders of magnitude more primordial information. This illustrates ability of potential density reconstruction algorithms, to improve the baryonic acoustic oscillation measurements from current and future large scale structure surveys. [ABSTRACT FROM AUTHOR]