  I show a scheme which allows a perfect transfer of an unknown single-qubit
atomic state from one atom to another by letting two atoms interact
simultaneously with a cavity QED. During the interaction between atom and
cavity, the cavity is only virtually excited and accordingly the scheme is
insensitive to the cavity field states and cavity decay. Based on this scheme,
a network for transfer of an arbitrary single-qubit atomic state between atoms
is engineered. Then the scheme is generalized to perfectly transfer an
arbitrary 2-qubit atomic state and accordingly a network for transfer of an
arbitrary 2-qubit atomic state is designed. At last, it is proven that the
schemes can be generalized to an arbitrary $n(n\ge 3)$-qubit atomic state
transfer case and a corresponding network is also proposed.
