Abstract

In this work we present a theoretical frame work to identify the role and the nature of interference between Autler–Townes (AT) peaks (or dressed states) in generic multi-level system. In three-level system, the two AT peaks interfere pair-wise with each other, almost similar to the two-slit interference. In four-level system, the interference between the three AT peaks is also pair-wise only with no higher order of interference analogous to three-slit interference but has a bit more complicated nature of interference. However, in many practical situations in atomic systems only the simple form of interference similar to three-level system dominates. In the three-level system, the nature of interference (i.e. constructive, destructive or no interference) between the two AT peaks is purely determined by the natural decay rate of the states coupled by the control laser(s). However, in four-level system the nature of interference between the two extreme AT peaks can be tuned from constructive to destructive by tuning the power of the control lasers.

Graphical abstract

中文翻译：

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通用多级系统中Autler–Townes峰之间的干扰性质

摘要

在这项工作中，我们提出了一个理论框架，以确定通用多级系统中Autler-Townes（AT）峰（或穿衣状态）之间的干扰的作用和性质。在三电平系统中，两个AT峰彼此成对干扰，几乎类似于两狭缝干扰。在四级系统中，三个AT峰之间的干扰也是成对的，并且没有类似于三缝干扰的更高阶干扰，但是干扰的性质稍微复杂一些。但是，在原子系统的许多实际情况下，仅类似于三能级系统的简单干扰形式占主导地位。在三级系统中，干扰的性质（即建设性，两个AT峰之间的干扰（无干扰或无干扰）完全由控制激光器耦合的状态的自然衰减率确定。但是，在四能级系统中，可以通过调节控制激光器的功率，将两个极端AT峰之间的干扰性质从相长调至相消。

图形概要