  The static and dynamic polarizabilities, and the tune-out wavelengths of the
ground state of Rb and the hyperfine ground states of $^{87, 85}$Rb have been
calculated by using relativistic configuration interaction plus core
polarization(RCICP) approach. It is found that the first primary tune-out
wavelengths of the $ 5s_{1/2}, F=1, 2 $ states of $ ^{87}$Rb are
790.018187(193) nm and 790.032602(193) nm severally, where the calculated
result for the $ 5s_{1/2}, F=2 $ state is in good agreement with the latest
high-precision measurement 790.032388(32) nm [Phys. Rev. A 92, 052501 (2015)].
Similarly, the first primary tune-out wavelengths of the $ 5s_{1/2}, F=2, 3 $
states of $^{85}$Rb are 790.023515(218) nm and 790.029918(218) nm respectively.
Furthermore, the tune-out wavelengths for the different magnetic sublevels $
M_{F}$ of each hyperfine level $F$ are also determined by considering the
contributions of tensor polarizabilities.
