Resonance fluorescence of N entangled atoms in a strong driving field

In the limit of a strong driving field, the resonance fluorescence of N two-level atoms initially in the various maximum-entangled states with the same average excited-atom number is investigated. We find that the steady-state fluorescent integrated intensity on resonance is proportional to [(N−2m)2+2N]/4 (N>2), which will become smaller as m increases. In particular, the cases for two, three and four two-level maximum-entangled atoms are discussed, respectively.