Steady-state two-level atomic population inversion via a quantized cavity field.
Steady-state two-level atomic population inversion via a quantized cavity field.
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通过量子化空腔场进行稳态两级原子布居反转。
DOI：
10.1103/physreva.38.5182
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Savage
中科院分区：
文献类型：
--
作者：
Lindberg;Savage
用激光照射的二能级原子，如果耦合到一个腔中，可以被驱动到一个种群反转的稳态。这是电磁场量子性质的结果，是半经典理论所禁止的。我们用数值方法和解析方法分析了这种反转。我们找到了最大可能的反转，并确定了接近稳态的速率。量子化的空腔改变了原子所看到的电磁真空；这将我们的工作与空腔增强自发辐射和动力线变窄的研究联系起来。考虑了反演的实验特征和可能存在的实验困难。例如，无论是在模中存在许多原子还是在腔中存在许多模都不会破坏反转。
A two-level atom illuminated by a laser may be driven into a population-inverted steady state if it is coupled to a cavity. This is a result of the quantum nature of the electromagnetic field and is forbidden by the semiclassical theory. We numerically and analytically analyze this inversion. We find the maximum possible inversion and determine the rate of approach to the steady state. The quantized cavity modifies the electromagnetic vacuum seen by the atom; this connects our work to that on cavity-enhanced spontaneous emission and on dynamical line narrowing. Experimental signatures of the inversion and potential experimental difficulties are considered. For example, neither the presence of many atoms in the mode nor many modes in the cavity destroys the inversion.