  We propose a scheme for generating entangled states for two or more
multi-level atoms in a thermal cavity. The photon-number dependent parts in the
effective Hamiltonian are canceled with the assistant of a strong classical
field. Thus the scheme is insensitive to both the cavity decay and the thermal
field. The scheme does not require individual addressing of the atoms in the
cavity. The scheme can also be used to generate entangled states for many hot
multi-level ions.
