Wei Feng, Yong Li, Shi-Yao Zhu
We study the influence of the distribution of atoms on the cooperative spontaneous emission by a simple model of three identical atoms. The effects of counter rotating terms are included by a unitary transformation method. By discussing two special cases that the three atoms are arranged as an equilateral triangle and in a straight line, we find that the superradiance of the will be enhanced. Next, we calculate the emission spectra of three identical atoms under the single-photon state. We find that the distribcoherent system largely dependent on the homogeneity of the atomic distribution. If the atoms distribute symmetrically, the superradiant emission ution of atoms also has a great impact on the lamb shift and the spectrum. If three atoms are placed into an equilateral triangle and the same dipole moment is perpendicular to the plane of the three atoms, the spectrum will degenerate into two peaks from the three peaks for general case.
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http://arxiv.org/abs/1302.0957
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