Oohata Goro, Shimizu Ryosuke, Edamatsu Keiichi
Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan.
Phys Rev Lett. 2007 Apr 6;98(14):140503. doi: 10.1103/PhysRevLett.98.140503. Epub 2007 Apr 3.
We have investigated the polarization entanglement between photon pairs generated from a biexciton in a CuCl single crystal via resonant hyperparametric scattering. The pulses of a high repetition pump are seen to provide improved statistical accuracy and the ability to test Bell's inequality. Our results clearly violate the inequality and thus manifest the quantum entanglement and nonlocality of the photon pairs. We also analyzed the quantum state of our photon pairs using quantum state tomography.
我们通过共振超参量散射研究了CuCl单晶中双激子产生的光子对之间的偏振纠缠。高重复率泵浦脉冲可提高统计精度并具备测试贝尔不等式的能力。我们的结果明显违反了该不等式，从而证明了光子对的量子纠缠和非定域性。我们还使用量子态层析成像分析了光子对的量子态。
