  We compute from chiral two- and three-body forces the complete quasiparticle
interaction in symmetric nuclear matter up to twice nuclear matter saturation
density. Second-order perturbative contributions that account for
Pauli-blocking and medium polarization are included, allowing for an
exploration of the full set of central and noncentral operator structures
permitted by symmetries and the long-wavelength limit. At the Hartree-Fock
level, the next-to-next-to-leading order three-nucleon force contributes to all
noncentral interactions, and their strengths grow approximately linearly with
the nucleon density up that of saturated nuclear matter. Three-body forces are
shown to enhance the already strong proton-neutron effective tensor
interaction, while the corresponding like-particle tensor force remains small.
We also find a large isovector cross-vector interaction but small
center-of-mass tensor interactions in the isoscalar and isovector channels. The
convergence of the expansion of the noncentral quasiparticle interaction in
Landau parameters and Legendre polynomials is studied in detail.
