Coherent Resonance Energy Transfer And Energy Extraction Of A Pair Of Two-level Atoms

A pair of two level atoms is taken as research object.The coherent resonance energy transfer of a pair two-level atoms is studied from the perspective of quantum coherence.Taking the dipole-dipole interaction of atoms and the light field as perturbation,quantum mechanics nondegenerate perturbation and solving Schrodinger equation in subspace are used.The analytical formula of the coherent resonance energy transfer efficiency of a pair two-level atoms at the same atomic transition frequency is obtained.Atomic dipole electric field is equivalently replaced by the same frequency light field,and the energy transfer efficiency of one pair of two-level atomic coherent is obtained when there exists detuning between two atomic transition frequencies.The atomic dipole electric field equivalent is replaced by the same frequency light field,and the analytic formula of the coherent resonance energy transfer efficiency of a pair two-level atoms is obtained when there exists detuning of the two atomic transition frequencies.The theoretical results show that the longer the excited state lifetime of the donor atom is,the higher the energy transfer efficiency is.The coherent resonance energy transfer efficiency is directly proportional to the square of the sine of the minus three power of the distance between two atoms,inversely proportional to the sixth power of the distance between two atoms under first-order approximation.The stronger the two-atom dipole-dipole interaction is,the higher the energy transfer efficiency is,the stronger the ability to restrain spontaneous emission of the donor atoms is.The energy transfer efficiency is periodically decaying over time.With the increase of the detuning of the two atomic transition frequency,the energy transfer efficiency decays rapidly.After obtaining the analytic formula of the coherent resonance energy transfer efficiency,then the single time and N times energy extraction of acceptor atom is studied.The relative maximum value problems of single time and N times energy extraction are studied by using the graphic method to solve the differential equations.