无光子交换微脉泽谱线展宽
Micromaser line broadening without photon exchange
摘要：
利用主方程和量子回归方法计算了微脉泽的线宽。一个“退相”的贡献是确定从泵送过程中保存的光子数，并没有出现在光子统计。我们工作的单原子微波激射器与精确控制的耦合和激光的相互作用时间是广泛分布的例子。在后一种情况下，我们还评估了最近开发的统一Lindblad近似的主方程的收敛性，它是相对缓慢的。
英文摘要：
We perform a calculation of the linewidth of a micromaser, using the master equation and the quantum regression approach. A `dephasing' contribution is identified from pumping processes that conserve the photon number and do not appear in the photon statistics. We work out examples for a single-atom maser with a precisely controlled coupling and for a laser where the interaction time is broadly distributed. In the latter case, we also assess the convergence of a recently developed uniform Lindblad approximation to the master equation; it is relatively slow.
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