  We investigate the spatial motion of the trapped atom with the
electromagnetically induced transparency (EIT) configuration where the two Rabi
transitions are coupled to two classical light fields respectively with the
same detuning. When the internal degrees of freedom can be decoupled
adiabatically from the spatial motion of the center of mass via the
Born-Oppenheimer approximation, it is demonstrated that the lights of certain
profile can provide the atom with an effective field of magnetic monopole,
which is the so-called induced gauge field relevant to the Berry's phase. Such
an artificial magnetic monopole structure manifests itself in the
characterizing energy spectrum.
