两原子与双模腔场喇曼相互作用(g_1≠g_2)的辐射谱

EMISSION SPECTRA OF TWO ATOMS INTERACTING WITH TWO MODES OF THE CAVITY FIELD THROUGH RAMAN PROCESS (g_1≠g_2)

研究了两个有效双能级原子与双模腔场具有不同耦合常数(g_1≠g_2)时通过喇曼相互作用的辐射谱,详细讨论了双模腔场分别处于不同数态时的情形,发现其辐射谱具有如下新特点:当模1腔场处于真空态,模2腔场处于弱场中时,随着R=g_2/g_1的增加,辐射谱交替出现对称的10峰、6峰结构,与单模双原子情形相比较,更为灵敏地反映出两原子与腔场间不同的喇曼相互作用强度;当模1腔场处于真空态、模2腔场处于强场中时,0<R<1的辐射谱展现出对称的10峰结构;n_1=1,n_2=50的谱与n_1=50,n_2=1的谱之间的明显差别反映了模1、模2腔场与两原子喇曼相互作用过程中的不同地位.最后。

Emission spectra of a pair of effective two-level atoms interacting with two modes of the cavity field through Raman interaction are studied, where the interaction of each atom with the field may be different. The spectra with two modes of the cavity field being initially in various number states are analysed in detail. It is found that emission spectra manifest following new properties: When mode 1 of the cavity field is in vacuum state and the other is in the weak field , the spectrum shows symmetric ten peaks and six peaks alternately, with the increase of R=g2/g1, which reflects the different Raman interacting intensities of two atoms with the cavity field more sensitively compared with the spectrum of two atoms in a single-mode cavity. The spectrum with 0<R<1 consists of symmetric ten peaks when mode 1 of cavity field is in vacuum state and the other is in the strong field. The obvious difference between the spectra when n1=1, n2=50 and n1 = 50, n2=1 reflects the different positions of mode 1 and mode 2 of cavity field interacting with two atoms through Raman process. Finally, the symmetric 16-peaks structure of the spectrum is explained.