两原子相干共振能量传递的单次与N次能量提取  

Single time and N times energy extraction of two atoms coherent resonance energy transfer

作　　者：白小刚[1] 张海明[1] BAI Xiao-Gang;ZHANG Hai-Ming(School of Science,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]天津工业大学理学院,天津300387

出　　处：《原子与分子物理学报》2018年第5期820-824,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(61274064)

摘　　要：两原子间隔一定距离且两原子跃迁频率接近时,两原子之间可发生能量传递.理论研究了供能原子和受能原子两共振原子的能量传递.求解薛定谔方程得出两原子共振能量传递效率.结果表明,供能原子在真空场中的激发态寿命在能量传递效率中起到十分重要的作用.能量传递效率与两原子间距离的负三次幂的正弦值的平方成正比,在一阶近似条件下,与两原子间距离的6次方成反比.以供能原子处于激发态时为初始时刻,能量从初始时刻随时间由供能原子向受能原子传递,对受能原子的单次能量提取的最大值大约在供能原子寿命的2/3时刻;对受能原子的连续N次能量提取的最大值,每次提取时间大约在供能原子寿命的1/2时刻.When two atoms are spaced at a certain distance and the two atomic transition frequencies are close to each other,the energy transfer can occur between the two atoms.In this paper,the energy transfer between donor atom and acceptor atom is studied.The solution of the two atoms resonance energy transfer efficiency is obtained by solving the Schrodinger equation.The results show that the lifetime of excited atom in the vacuum field plays an important role in the energy transfer efficiency.The energy transfer efficiency is proportional to the square of the sine of the negative three power of the distance between the two atoms.In the first order approximation,the efficiency is inversely proportional to the 6 power of the distance between the two atoms.The donor atom is the initial time when donor atom is in the excited state,and the energy begins to transfer from the donor atom to the acceptor atom.The maximum energy of the single time energy extraction is about 2/3 of the lifetime of the donor atom.The maximum energy is obtained for the N times energy extraction,the extraction time of every time is about 1/2 of the lifetime of the donor atom.

关 键 词：原子间相互作用 相干共振能量传递 能量提取 

分 类 号：O562.4[理学—原子与分子物理]