Choi Wonshik, Lee Jai-Hyung, An Kyungwon, Fang-Yen C, Dasari R R, Feld M S
School of Physics, Seoul National University, Seoul, 151-742, Korea.
Phys Rev Lett. 2006 Mar 10;96(9):093603. doi: 10.1103/PhysRevLett.96.093603. Epub 2006 Mar 7.
We have measured the second-order correlation function of the cavity-QED microlaser output and observed a transition from photon bunching to antibunching with increasing average number of intracavity atoms. The observed correlation times and the transition from super- to sub-Poisson photon statistics can be well described by gain-loss feedback or enhanced-reduced restoring action against fluctuations in photon number in the context of a quantum microlaser theory and a photon rate equation picture. However, the theory predicts a degree of antibunching several times larger than that observed, which may indicate the inadequacy of its treatment of atomic velocity distributions.
我们测量了腔量子电动力学微激光输出的二阶关联函数，并观察到随着腔内原子平均数量的增加，从光子聚束到反聚束的转变。在量子微激光理论和光子速率方程的框架下，所观察到的关联时间以及从超泊松光子统计到亚泊松光子统计的转变，可以通过增益-损耗反馈或针对光子数波动的增强-减弱恢复作用得到很好的描述。然而，该理论预测的反聚束程度比观察到的大几倍，这可能表明其对原子速度分布的处理不够充分。
