The burst of light is called a photon echo; and its observation proved we have full control over the quantum state of the atoms.
辐射出的光被称为光子回波，它的观测表明我们对于原子的量子态进行了完全的控制。
Moreover, the photon echo signal gave the dephasing time due to the phonon interaction.
同时由光子回波信号测得由声子作用引起的波包退相特征时间。
The stimulated photon echo in degenerate two-level system has been studied.
研究了简并二能级系统的受激光子回波效应。
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