  We investigate the role of the magnetohydrodynamic (MHD) turbulence measured
by Voyager in the very local interstellar medium (VLISM) in modeling the
Interstellar Boundary Explorer (IBEX) ribbon. We demonstrate that the mirroring
by compressible modes of MHD turbulence dominates over that by the mean
magnetic field. Based on the new mirror diffusion mechanism identified by
Lazarian and Xu for particles with large pitch angles in MHD turbulence, we
find that the mirror diffusion can both confine pickup ions and preserve their
initial pitch angles, and thus accounts for the enhanced intensity of energetic
neutral atoms that return to the heliosphere. The ribbon width is determined by
both the range of pitch angles for effective turbulent mirroring and the field
line wandering induced by Alfv\'{e}nic modes. It in turn provides a constraint
on the amplitude of magnetic fluctuations of fast modes. The field line
wandering also affects the coherence of the ribbon structure across the sky. By
extrapolating the magnetic energy spectrum measured by Voyager, we find that
the injection scale of the turbulence in the VLISM is less than $\sim 500$ au
for the ribbon structure to be coherent.
