利用量子“鬼”干涉与成像辨识纠缠
量子物理
2009-11-10 v2
摘要
我们报道一个量子干涉与成像实验，定量地证明爱因斯坦-波多尔斯基-罗森(EPR)型纠缠双光子态展现出比任何经典关联都更强的动量-动量与位置-位置关联。测量确实显示纠缠双光子的动量之和与位置之差的不确定度满足两个EPR不等式 D(k1+k2)<min(D(k1),D(k2)) 和 D(x1-x2)<min(D(x1),D(x2))。这两个不等式共同代表一个非经典性条件。我们的测量为在连续变量双光子/双光子系统中区分量子纠缠与经典关联提供了直接方法。
引用
@article{arxiv.quant-ph/0401007,
title = {Identifying entanglement using quantum "ghost" interference and imaging},
author = {Milena D'Angelo and Yoon-Ho Kim and Sergei P. Kulik and Yanhua Shih},
journal= {arXiv preprint arXiv:quant-ph/0401007},
year = {2009}
}
备注
We have changed Eq.(2) from one inequality to two inequalities. The two expressions are actually consistent with each other, but the new one represents a more stringent condition for entanglement and, in our opinion, better explains the original idea of EPR. We have clarified this point in the paper. 4 pages; submitted to PRL