相干制备非简并Y型四能级关联发射laser：一种三重纠缠光源
Coherently prepared nondegenerate Y-shaped four-level correlated emission laser: A source of tripartite entangled light
摘要：
本文详细推导了相干制备的$Y$型四能级关联发射激光器的腔辐射主方程。还提供了可用于解析求解随机微分方程和各种相关性的速率方程的程序的大纲。结果表明，相干准备的原子在上两个能级和较低的，最初，可以导致一个真正的连续变量的三重纠缠。此外，将原子准备在相干叠加中，除了可能的最大值或最小值之外，上面两个能级，留下较低的未填充，可能导致类似的观察。由于原子在中间能级上有可能在诱导相干性的引导下采取三种不同的跃迁根，该系统通常被发现包含用于实际应用的多功能选项。特别地，通过外部辐射耦合偶极禁戒跃迁中的至少一个有望增强可检测纠缠的程度。
英文摘要：
A detailed derivation of the master equation of the cavity radiation of a coherently prepared $Y$-shaped four-level correlated emission laser is presented. The outline of the procedures that can be employed in analytically solving the stochastic differential equations and the rate equations of various correlations are also provided. It is shown that coherently preparing the atoms in the upper two energy levels and the lower, initially, can lead to a genuine continuous variable tripartite entanglement. Moreover, preparing the atoms in the coherent superposition, other than the possible maximum or minimum, of the upper two energy levels, leaving the lower unpopulated, may lead to a similar observation. With the possibility of the atom at the intermediate energy level to take three different transition roots guided by the induced coherence, this system in general is found to encompass versatile options for practical utilization. In particular, coupling at least one of the dipole forbidden transitions by an external radiation is expected to enhance the degree of detectable entanglement.
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