  The evaluation of BPS Wilson loops in N=6, D=3 Chern-Simons matter theory is
reduced to ordinary matrix integrals via localization technique. It is easy to
check that the vacuum expectation value of 1/2 BPS Wilson loops at leading
order in planar limit agrees with the regularized classical string action, via
AdS/CFT. Then the subleading terms in principle can be calculated by treating
the string theory semi-classically. In this article we calculate the one-loop
determinant for fluctuation modes of holographic Wilson loop in the dual
geometry AdS4xCP3. The fermionic normal mode frequencies are expressed in terms
of the hypergeometric function, and we compute the one-loop effective action
numerically. The discrepancy with localization formula is due to the zero mode
normalization constant, which is yet to be determined.
