Using the photon closed orbit theory, the spontaneous emission rate of a polarized atom in a medium between two parallel mirrors is derived and calculated. It is found that the spontaneous emission rate of a polarized...Using the photon closed orbit theory, the spontaneous emission rate of a polarized atom in a medium between two parallel mirrors is derived and calculated. It is found that the spontaneous emission rate of a polarized atom between the mirrors is related to the atomic position and the polarization direction. The results show that in the vicinity of the mirror, the variation of the spontaneous emission rate depends crucially on the atomic polarization direction. With the increase of the polarization angle, the oscillation in the spontaneous emission rate becomes decreased. For the polarization direction parallel to the mirror plane, the oscillation is the greatest; while for the perpendicular polarization direction, the oscillation is nearly vanished. The agreement between our result and the quantum electrodynamics result suggests the correctness of our calculation. This study further verifies that the atomic spontaneous emission process can be effectively controlled by changing the polarization orientation of the atom.展开更多
To solve those problems such as farmland deficiency, ecological environment deterioration, high consumption of resources with low efficiency, serious agricultural pollution, and lack of scientific and technological su...To solve those problems such as farmland deficiency, ecological environment deterioration, high consumption of resources with low efficiency, serious agricultural pollution, and lack of scientific and technological support for agriculture, the basic researches in breeding theories, serious birds epidemic diseases, agriculture protections, multiple information acquisition methods and diagnosis mechanisms in precision farming, quality formation process of crop produces, and mechanisms of nondestructive examination were explored in this paper, And the results could provide information resources to strengthen the scientific and technologyical support for agriculture and its sustainable development.展开更多
基金Supported by National Natural Science Foundation of China under Grant No. 10604045the University Science & Technology Planning Program of Shandong Province under Grant No. J09LA02the Discipline Construction Fund of Ludong University
文摘Using the photon closed orbit theory, the spontaneous emission rate of a polarized atom in a medium between two parallel mirrors is derived and calculated. It is found that the spontaneous emission rate of a polarized atom between the mirrors is related to the atomic position and the polarization direction. The results show that in the vicinity of the mirror, the variation of the spontaneous emission rate depends crucially on the atomic polarization direction. With the increase of the polarization angle, the oscillation in the spontaneous emission rate becomes decreased. For the polarization direction parallel to the mirror plane, the oscillation is the greatest; while for the perpendicular polarization direction, the oscillation is nearly vanished. The agreement between our result and the quantum electrodynamics result suggests the correctness of our calculation. This study further verifies that the atomic spontaneous emission process can be effectively controlled by changing the polarization orientation of the atom.
文摘To solve those problems such as farmland deficiency, ecological environment deterioration, high consumption of resources with low efficiency, serious agricultural pollution, and lack of scientific and technological support for agriculture, the basic researches in breeding theories, serious birds epidemic diseases, agriculture protections, multiple information acquisition methods and diagnosis mechanisms in precision farming, quality formation process of crop produces, and mechanisms of nondestructive examination were explored in this paper, And the results could provide information resources to strengthen the scientific and technologyical support for agriculture and its sustainable development.
