Sakai H, Saito T, Ikeda T, Itoh K, Kawabata T, Kuboki H, Maeda Y, Matsui N, Rangacharyulu C, Sasano M, Satou Y, Sekiguchi K, Suda K, Tamii A, Uesaka T, Yako K
Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan.
Phys Rev Lett. 2006 Oct 13;97(15):150405. doi: 10.1103/PhysRevLett.97.150405.
We report the results of the first-time test of the local hidden variable theories (Bell-Clauser-Horne-Shimony-Holt) involving strongly interacting pairs of massive spin 1/2 hadrons from the decay of short-lived (tau<10;-21sec) 2He spin-singlet state, populated in the nuclear reaction 2H+;1H-->;2He+n. The novel features of this experiment are (a) the use of an 'event-ready' [corrected] detector of nearly 100% efficiency to prepare an unbiased sample and (b) a focal-plane polarimeter of full 2pi sr acceptance with a random "post selection" of the reference axes. The spin-correlation function is deduced to be Sexp=2.83+/-0.24stat+/-0.07sys. This result is in agreement with nonlocal quantum mechanical prediction and it violates the Bell-CHSH inequality of |S|<or=2 at a confidence level of 99.3%.
我们报告了对局部隐变量理论（贝尔 - 克劳泽 - 霍恩 - 希莫尼 - 霍尔特）首次测试的结果，该测试涉及来自短寿命（τ<10⁻²¹秒）²He自旋单重态衰变的强相互作用的大质量自旋1/2强子对，²He自旋单重态通过核反应²H + ¹H→²He + n产生。该实验的新特点是：（a）使用效率接近100%的“事件就绪”[已修正]探测器来制备无偏样本；（b）具有全2π立体角接受度的焦平面偏振仪，对参考轴进行随机“后选择”。推导出的自旋关联函数为Sexp=2.83±0.24统计误差±0.07系统误差。该结果与非局部量子力学预测一致，并且在99.3%的置信水平下违反了|S|≤2的贝尔 - 克劳泽 - 霍恩 - 希莫尼 - 霍尔特不等式。
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