Effects of atomic cooperation and dipole correlation on the N-photon emission spectrum of atoms

摘要

Two new results are revealed. First, in the strong-field region of cavity-mode the two-atom emission spectrum shows four peaks for N $GRT 1 (vs. three for N $EQ 1). The distance between the two inner peaks is twice as large as the corresponding one in the one-atom spectrum due to atomic cooperation. Second, the inclusion of atomic dipole-dipole interaction makes the emission spectrum asymmetric; this effect is most obvious in the vacuum field.