Violation of multiparticle Bell inequalities for low- and high-flux parametric amplification using both vacuum and entangled input states
Violation of multiparticle Bell inequalities for low- and high-flux parametric amplification using both vacuum and entangled input states
复制标题
DOI：
10.1103/physreva.66.033801
复制
发表时间：
2001-04
影响因子：
2.9
通讯作者：
Margaret D. Reid;W. J. Munro;F. Martini
中科院分区：
文献类型：
--
作者：
Margaret D. Reid;W. J. Munro;F. Martini
我们展示了由参数下转换产生的输出场的偏振测量将如何揭示在低和高输出强度范围内违反多粒子贝尔不等式。在这种情况下，对其执行测量的每个空间分离的系统由多于一个粒子组成。考虑到与自旋系统的形式类比，该提议提供了一个检验空间分离的高自旋态的量子力学预测的机会。在这里，即使在大量子(粒子)数的系统上进行测量，也可以演示可能的量子行为。我们的建议既适用于真空态信号和空闲输入，也适用于de Martini所研究的量子注入参数放大器。考虑了探测器效率低下的影响，并导出了较弱的Bell-Clauser-Horne不等式，以便能够在多粒子情况下利用辅助假设对局部隐藏变量进行现实检验。
We show how polarization measurements on the output fields generated by parametric down conversion will reveal a violation of multiparticle Bell inequalities, in the regime of both low- and high-output intensity. In this case, each spatially separated system, upon which a measurement is performed, is comprised of more than one particle. In view of the formal analogy with spin systems, the proposal provides an opportunity to test the predictions of quantum mechanics for spatially separated higher spin states. Here the quantum behavior possible even where measurements are performed on systems of large quantum (particle) number may be demonstrated. Our proposal applies to both vacuum-state signal and idler inputs, and also to the quantum-injected parametric amplifier as studied by De Martini The effect of detector inefficiencies is included, and weaker Bell-Clauser-Horne inequalities are derived to enable realistic tests of local hidden variables with auxiliary assumptions for the multiparticle situation.