Classical analogs of double electromagnetically induced transparency

Double electromagnetically induced transparency (DEIT) in a four-level atomic system with tripod-type energy-level configuration is modeled by using two classical systems. The first is a set of three coupled harmonic oscillators subject to frictional forces and external drives and the second is a set of three coupled RLC circuits with electric resistors and alternating voltage sources. It is shown that both of the two classical systems have absorption spectra of DEIT similar to that of the four-level tripod-type atomic system. These classical analogies provide simple and intuitive physical description of quantum interference processes and can be used to illustrate experimental observations of the DEIT in quantum systems. (c) 2012 Elsevier B.V. All rights reserved.

利用两个经典系统对具有三脚架型能级结构的四能级原子系统中的双电磁诱导透明（DEIT）进行建模。第一个是一组受摩擦力和外部驱动的三个耦合谐振子，第二个是一组带有电阻和交流电压源的三个耦合RLC电路。结果表明，这两个经典系统都具有与四能级三脚架型原子系统相似的DEIT吸收光谱。这些经典类比为量子干涉过程提供了简单直观的物理描述，并可用于说明量子系统中DEIT的实验观测结果。（c）2012爱思唯尔有限公司。版权所有。