共查询到16条相似文献,搜索用时 46 毫秒
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研究了存在偶极-偶极相互作用的两个等同二能级原子与单模光场喇曼耦合过程的腔场谱.结果表明,当两原子处于同一能级时,腔场谱在弱场和强场条件下相应地为五峰和三峰结构.当两原子初态处于不同能级时,交换对称性对谱结构有明显的影响. 原子间的相互作用只在初始场很弱时才会影响谱结构. 相似文献
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本文用密度算符方法研究了级联工能级原子同单膜腔场的相互作用,求得了辐射场的光子数几率分布,并讨论了反聚束效应和不同偏调的影响. 相似文献
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Effects of an applied low frequency field on the dynamics of a two-level atom interacting with a single-modefield 下载免费PDF全文
The effects of an applied low frequency field on the
dynamics of a two-level atom interacting with a single-mode field
are investigated. It is shown that the time evolution of the atomic
population is mainly controlled by the coupling constants and the
frequency of the low frequency field, which leads to a low frequency
modulation function for the time evolution of the upper state
population. The amplitude of the modulation function becomes larger
as the coupling constants increase. The frequency of the modulation
function is proportional to the frequency of the low frequency
field, and decreases with increasing coupling constant. 相似文献
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Single photon transport properties in coupled cavity arrays nonlocally coupled to a two-level atom in the presence of dissipation 下载免费PDF全文
We discuss the effects of dissipation on the behavior of single photon transport in a system of coupled cavity arrays,with the two nearest cavities nonlocally coupled to a two-level atom.The single photon transmission amplitude is solved exactly by employing the quasi-boson picture.We investigate two different situations of local and nonlocal couplings,respectively.Comparing the dissipative case with the nondissipative one reveals that the dissipation of the system increases the middle dip and lowers the peak of the single photon transmission amplitudes,broadening the line width of the transport spectrum.It should be noted that the influence of the cavity dissipation to the single photon transport spectrum is asymmetric.By comparing the nonlocal coupling with the local one,one can find that the enhancement of the middle dip of single photon transmission amplitudes is mostly caused by the atom dissipation and that the reduced peak is mainly caused by the cavity dissipation,no matter whether it is a nonlocal or local coupling case.Whereas in the nonlocal coupling case,when the coupling strength gets stronger,the cavity dissipation has a greater effect on the single photon transport spectrum and the atom dissipation affection becomes weak,so it can be ignored. 相似文献
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Effect of cavity dissipation on the emission spectrum of an atom interacting with a field in the dispersive approximation 下载免费PDF全文
The emission spectrum of a two-level atom interacting
dispersively with a single mode radiation field in the dissipative
cavity is investigated. A general expression for the emission
spectrum is derived. The numerical results for the initial field in
coherent state are calculated. It is found that the spectrum
structure is influenced significantly by the cavity damping constant
\kappa , and the spectrum structure is dependent on the
interaction time T when the cavity dissipation is present. Only
one peak located at Ωa appears in the atomic spectra for
larger T. 相似文献
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Boris F. Samsonov V. V. Shamshutdinova D. M. Gitman 《Czechoslovak Journal of Physics》2005,55(9):1173-1176
We study chains of transformations introduced in B.F. Samsonov and V.V. Shamshutdinova: J. Phys. A: Math. Gen. 38 (2005) 4715, in order to obtain electric fields with a time-dependent frequency for which the equation of motion of a two-level
atom in the presence of these fields can be solved exactly. We show that a polynomial pseudosupersymmetry may be associated
to such chains.
Presented at the 3rd International Workshop “Pseudo-Hermitian Hamiltonians in Quantum Physics”, Istanbul, Turkey, June 20–22,
2005. 相似文献