  We study the anisotropic orbital effect in the electric field tunability of
the phonon induced spin-flip rate in quantum dots (QDs). Our study shows that
anisotropic gate potential enhances the spin-flip rate and reduces the level
crossing point to a lower quantum dot radius due to the suppression of the
Land$\acute{e}$ g-factor towards bulk crystal. In the range of $10^4-10^6$
V/cm, the electric field tunability of the phonon induced spin-flip rate can be
manipulated through strong Dresselhaus spin-orbit coupling. These results might
assist the development of a spin based solid state quantum computer by
manipulating phonon induced spin-flip rate through spin-orbit coupling with the
application of anisotropic gate potential in a regime where the g-factor
changes its sign.
