两能级原子置于噪声场中,噪声场用热库态描述.得出原子与噪声场相互作用过程中原子约化密度算符非对角元,讨论原子相干性的衰变.如果在相互作用系统中外加驱动场,当外加驱动场的时间演化满足一定条件时,可保持原子的相干性.
参考文献
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