Interaction potential of two nonidentical ground-state atoms  

作　　者：Yan Peng Shijing Cheng Wenting Zhou 

机构地区：[1]Department of Physics,Synergetic Innovation Center for Quantum Effects and Applications and Institute of Interdisciplinary Studies,Hunan Normal University,Changsha 410081,China [2]School of Physics and Information Engineering,Shanxi Normal University,Taiyuan 030031,China [3]Department of Physics,School of Physical Science and Technology,Ningbo University,Ningbo 315211,China

出　　处：《Communications in Theoretical Physics》2023年第8期100-110,共11页理论物理通讯（英文版）

基　　金：supported in part by the NSFC under Grant Nos.11690034,12075084,11875172,12047551 and 12105061;the KC Wong Magna Fund in Ningbo University。

摘　　要：We study the interaction potential of two nonidentical ground-state atoms coupled to a scalar field in a vacuum by separately calculating the contributions of vacuum fluctuations and those of the radiation reaction of the atoms.Both cases of atoms in a free space and in parallel or vertical alignment to a reflecting boundary are considered.For the former case,we find that the leading-order interaction potential in the regionλA?L?λB exhibits the same separationdependence as that in the region L?λA?λB,where L,λA andλB are respectively the interatomic separation and the transition wavelengths of two atoms withλA?λB.For the latter case,we find that boundary-induced modifications are very remarkable when L?z,with z characterizing the separation between the two-atom system and the boundary.Particularly,when L further satisfies L?λA and L?λB,the interaction potential in the parallel-and the verticalalignment cases respectively scales as z4L-7 and z2L-5,the L-dependence of which is one order higher than those of two atoms in regions where L?z and meanwhile L?λA or/and L?λB.Our results suggest that retardation for the interaction potential of two nonidentical atoms with remarkably distinctive transition frequencies happens only when the interatomic separation is much greater than the transition wavelengths of both atoms.

关 键 词：boundary effects interatomic interaction potential nonidentical atoms with remarkably distinctive transition frequencies 

分 类 号：O413[理学—理论物理] O562[理学—物理]